From spock71 at paonline.com Fri Feb 1 19:41:25 2008 From: spock71 at paonline.com (Spock71) Date: Fri, 1 Feb 2008 20:41:25 -0500 Subject: [VoIP] Recordings / My Asterisk & Router Message-ID: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> Everytime I see no messages for a day or so, I think something's wrong with my e-mail client, listserve subscription, or the mail daemon at CNET; but I think it's actually the fact that nobody has anything to say at the time. So, that being the case, I'll add something. I had planned previously to purchase an Intertex router to solve my SIP problems that I've been having with no-audio calls going out from my box completing over that protocol. I decided to hold off thinking the problems would somehow be worked-around, and that, according to John I didn't need a costly router to get everything I want to work on my * box, as IAX calls are great with very few or no difficulties. Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP were prematurely cut off after less than 30 seconds. Now I don't know if that occured as a result of my opening up additional ranges of ports in my Linksys 300N router, or if there was actually a VoicePulse issue. Since I've very rarely had difficulty with VoicePulse actually failing during a SIP call, I prefer to think it is the 'former', or something related to my Linksys 300N. While not very likely due to routers from Linksys I've used before (and placing them in front of my 3-set windows looking S.E.), it is certainly possible that I may have affected the poor lil plastic-enclosed 300N when I transmitted on H.F. frequencies for the first time last night on SSB on 3 bands (160, 80 and 40 meters) with between 40 and 100 Watts RF. Previously, I'd used only the VHF/UHF bands of 2-meters and above, which is 144 MHz. and up, with no difficulties. Additionally, I don't believe consumer-grade routers are built with a high quality of care or components. Since the possibility of damage exists, and since I canNOT tolerate failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and order for an Intertex SurfinBird IX67 FW AIR GW2 router this morning, which may or may not arrive tomorrow via Priority Overnight FedEx, as I ordered. This router has 2 FXS and 1 FXO port, along with a built-in SIP proxy mini-server and full total integration of that proxy with the firewall and with NAT hardware/firmware. This router ALSO supports full SIP and other media types on it's 4-port LAN despite other-brand routers' omitting that support in total favor of built-in SIP ports that a few do have, and the rest who don't have any support for SIP or IAX at "all". The cost was over $300 but I feel it is well worth it, since this router is a commercial-grade router in addition to it's VoIP/SIP speciality-design. I also plan to place it at least 3 feet from the edge of the window opening(s). {I only wish it had a metal case too, for added RF protection since the case can be grounded}. This model also has wireless 802.11 b/g support. After the Intertex is installed and configured, the recordings I spoke of previously will be made available. Some will be put on the * box, but I think alot will be put on this neat lil device I forgot I had until tonight: an AEC (Automation Electronics Corp.) model 712 "The Messenger" mini-IVR system. It appears in good shape still; it has 6 line-ports (RJ-45), handset port (RJ-11), Remote Change line port (RJ-45), and C.O./PBX switchable termination for each of the 6 lines, and a separate Ext. MIC jack (which can be used as a line-level input via an attenuating mini-phone jack patchcord). With over a dozen function buttons, a numeric keypad and a 5-digit LED readout, I think it rises above any ordinary consumer-grade voicemail or audio storage system. I wonder if any of you fellows have had experience with this or other AEC-brand equipment. It seems heavy and of good sturdy quality (with a metal case, of course). I found this at one of the many hamfests (Amateur Radio flea-markets) that I've been to. You should know that hamfests can be a trove for telephone equipments as well, especially collectors. I've seen manual-ring phones, a couple fan-tail plunger lineswitches, 500- and 2500- type phones, 1A2 and other partial and WHOLE keysystems, and 1 or 2 entire PBXs at some of these hamfests, especially the larger hamfests. I have yet to find an entire CDO central office, but I've seen a few selectors/connectors since I've been a ham or 20 years, as well as a crossbar switch or two, and some misc. telephone gear and equipment and parts I wasn't familiar with. If any of you live close or within decent traveling distance to Dayton, OH, you might want to make the journey there this coming Spring, since it is THE LARGEST hamfest in the world with people traveling from outside the U.S. to attend it. I believe they still have the site http://www.daytonhamvention.com as the official website. At any rate, I'll update on here as I get this lil gem of mine set up for my audio recordings and place it online with 1 or 2 assigned (perhaps more) numbers. 73's, de Jeff (KA3RXE) Amateur Radio: A National Resource From spock71 at paonline.com Fri Feb 1 19:53:13 2008 From: spock71 at paonline.com (Spock71) Date: Fri, 1 Feb 2008 20:53:13 -0500 Subject: [VoIP] Recordings / My Asterisk & Router References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> Message-ID: <002a01c8653e$5f746360$0b01a8c0@spockraptor> ...new CORRECTION to the Dayton Hamvention Website: http://www.hamvention.org/ From jnovack at stromberg-carlson.org Sat Feb 2 08:21:25 2008 From: jnovack at stromberg-carlson.org (John Novack) Date: Sat, 02 Feb 2008 09:21:25 -0500 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> Message-ID: <47A47C65.3080701@stromberg-carlson.org> As many of us know, SIP can be a problem, especially with NAT. I have both Stanaphone and Gizmo as SIP providers, one is my portal for users to access CNET, and although I don't often rely on it for my ONLY connection to the PSTN, it mostly works. I also have Vonage with their locked ATA on the LAN side of my router. I use an 8 port Linksys consumer grade router with no related problems. When I used their 4 port version, with different firmware, SIP would die after about 18 minutes, sometimes killing all Internet access, sometimes coming back. This was with Vonage, Stanaphone and Gizmo. Once I changed the router to the 8 port version, I had no more problems. It has a completely different problem. My ISP is Comcast, and every so often they go on a tear of changing IP addresses, it seems not simply for me to annoy me, but they are doing some sort of network re-configuration or a fall back network or ??? No sense in calling customer service. I get better answers from my dogs! So when they are in this mode, I either have to tell the WAN DHCP to release and renew, or at times power cycle the router. I have no high energy RF to upset my router, as Jeff does. I have often though of going up a level or two with routers, but just as I explore the current field, things settle down for many weeks/months so the issue moves to the back of the line. I currently have built a small MonoWall configuration. I may go that route. The last time I tried, I had difficulty getting CNET to work, though everything else seemed just fine. Anyone have experience with other routers they would care to share? John Novack Spock71 wrote: > Everytime I see no messages for a day or so, I think something's wrong with my e-mail client, listserve subscription, or the mail daemon at CNET; but I think it's actually the fact that nobody has anything to say at the time. So, that being the case, I'll add something. > > I had planned previously to purchase an Intertex router to solve my SIP problems that I've been having with no-audio calls going out from my box completing over that protocol. I decided to hold off thinking the problems would somehow be worked-around, and that, according to John I didn't need a costly router to get everything I want to work on my * box, as IAX calls are great with very few or no difficulties. > Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP were prematurely cut off after less than 30 seconds. Now I don't know if that occured as a result of my opening up additional ranges of ports in my Linksys 300N router, or if there was actually a VoicePulse issue. Since I've very rarely had difficulty with VoicePulse actually failing during a SIP call, I prefer to think it is the 'former', or something related to my Linksys 300N. > While not very likely due to routers from Linksys I've used before (and placing them in front of my 3-set windows looking S.E.), it is certainly possible that I may have affected the poor lil plastic-enclosed 300N when I transmitted on H.F. frequencies for the first time last night on SSB on 3 bands (160, 80 and 40 meters) with between 40 and 100 Watts RF. Previously, I'd used only the VHF/UHF bands of 2-meters and above, which is 144 MHz. and up, with no difficulties. Additionally, I don't believe consumer-grade routers are built with a high quality of care or components. > Since the possibility of damage exists, and since I canNOT tolerate failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and order for an Intertex SurfinBird IX67 FW AIR GW2 router this morning, which may or may not arrive tomorrow via Priority Overnight FedEx, as I ordered. This router has 2 FXS and 1 FXO port, along with a built-in SIP proxy mini-server and full total integration of that proxy with the firewall and with NAT hardware/firmware. This router ALSO supports full SIP and other media types on it's 4-port LAN despite other-brand routers' omitting that support in total favor of built-in SIP ports that a few do have, and the rest who don't have any support for SIP or IAX at "all". The cost was over $300 but I feel it is well worth it, since this router is a commercial-grade router in addition to it's VoIP/SIP speciality-design. I also plan to place it at least 3 feet from the edge of the window opening(s). {I only wish it had a metal case too, for add > ed RF protection since the case can be grounded}. This model also has wireless 802.11 b/g support. > > After the Intertex is installed and configured, the recordings I spoke of previously will be made available. Some will be put on the * box, but I think alot will be put on this neat lil device I forgot I had until tonight: an AEC (Automation Electronics Corp.) model 712 "The Messenger" mini-IVR system. It appears in good shape still; it has 6 line-ports (RJ-45), handset port (RJ-11), Remote Change line port (RJ-45), and C.O./PBX switchable termination for each of the 6 lines, and a separate Ext. MIC jack (which can be used as a line-level input via an attenuating mini-phone jack patchcord). With over a dozen function buttons, a numeric keypad and a 5-digit LED readout, I think it rises above any ordinary consumer-grade voicemail or audio storage system. I wonder if any of you fellows have had experience with this or other AEC-brand equipment. It seems heavy and of good sturdy quality (with a metal case, of course). I found this at one of the many hamfests (Amateur Radio > flea-markets) that I've been to. > > You should know that hamfests can be a trove for telephone equipments as well, especially collectors. I've seen manual-ring phones, a couple fan-tail plunger lineswitches, 500- and 2500- type phones, 1A2 and other partial and WHOLE keysystems, and 1 or 2 entire PBXs at some of these hamfests, especially the larger hamfests. I have yet to find an entire CDO central office, but I've seen a few selectors/connectors since I've been a ham or 20 years, as well as a crossbar switch or two, and some misc. telephone gear and equipment and parts I wasn't familiar with. If any of you live close or within decent traveling distance to Dayton, OH, you might want to make the journey there this coming Spring, since it is THE LARGEST hamfest in the world with people traveling from outside the U.S. to attend it. I believe they still have the site http://www.daytonhamvention.com as the official website. > > At any rate, I'll update on here as I get this lil gem of mine set up for my audio recordings and place it online with 1 or 2 assigned (perhaps more) numbers. > 73's, > de Jeff (KA3RXE) Amateur Radio: A National Resource > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > > -- Dog is my co-pilot From ian at uax.org.uk Sat Feb 2 09:13:35 2008 From: ian at uax.org.uk (Ian Jolly) Date: Sat, 2 Feb 2008 15:13:35 -0000 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <47A47C65.3080701@stromberg-carlson.org> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> <47A47C65.3080701@stromberg-carlson.org> Message-ID: <3E067B4F3EAD41E5BAA135161FE21DFA@IanPC> I also have a Linksys 8 FXS ATA and have about half the ports populated with no problems so far in four weeks. The only problem I find is the noise level from the fan! You can hear it 20 yards away! Does anyone-else have this problem with the fan? Ian J ----- Original Message ----- From: "John Novack" To: "Voice Over IP Tandem for Analog Switches" Sent: Saturday, February 02, 2008 2:21 PM Subject: Re: [VoIP] Recordings / My Asterisk & Router > As many of us know, SIP can be a problem, especially with NAT. > I have both Stanaphone and Gizmo as SIP providers, one is my portal for > users to access CNET, and although I don't often rely on it for my ONLY > connection to the PSTN, it mostly works. > I also have Vonage with their locked ATA on the LAN side of my router. > I use an 8 port Linksys consumer grade router with no related problems. > When I used their 4 port version, with different firmware, SIP would die > after about 18 minutes, sometimes killing all Internet access, sometimes > coming back. This was with Vonage, Stanaphone and Gizmo. > Once I changed the router to the 8 port version, I had no more problems. > It has a completely different problem. My ISP is Comcast, and every so > often they go on a tear of changing IP addresses, it seems not simply > for me to annoy me, but they are doing some sort of network > re-configuration or a fall back network or ??? No sense in calling > customer service. I get better answers from my dogs! > So when they are in this mode, I either have to tell the WAN DHCP to > release and renew, or at times power cycle the router. > I have no high energy RF to upset my router, as Jeff does. > I have often though of going up a level or two with routers, but just as > I explore the current field, things settle down for many weeks/months so > the issue moves to the back of the line. > I currently have built a small MonoWall configuration. I may go that > route. The last time I tried, I had difficulty getting CNET to work, > though everything else seemed just fine. > > Anyone have experience with other routers they would care to share? > > John Novack > > Spock71 wrote: >> Everytime I see no messages for a day or so, I think something's wrong >> with my e-mail client, listserve subscription, or the mail daemon at >> CNET; but I think it's actually the fact that nobody has anything to say >> at the time. So, that being the case, I'll add something. >> >> I had planned previously to purchase an Intertex router to solve my SIP >> problems that I've been having with no-audio calls going out from my box >> completing over that protocol. I decided to hold off thinking the >> problems would somehow be worked-around, and that, according to John I >> didn't need a costly router to get everything I want to work on my * box, >> as IAX calls are great with very few or no difficulties. >> Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP were >> prematurely cut off after less than 30 seconds. Now I don't know if that >> occured as a result of my opening up additional ranges of ports in my >> Linksys 300N router, or if there was actually a VoicePulse issue. Since >> I've very rarely had difficulty with VoicePulse actually failing during a >> SIP call, I prefer to think it is the 'former', or something related to >> my Linksys 300N. >> While not very likely due to routers from Linksys I've used before (and >> placing them in front of my 3-set windows looking S.E.), it is certainly >> possible that I may have affected the poor lil plastic-enclosed 300N when >> I transmitted on H.F. frequencies for the first time last night on SSB on >> 3 bands (160, 80 and 40 meters) with between 40 and 100 Watts RF. >> Previously, I'd used only the VHF/UHF bands of 2-meters and above, which >> is 144 MHz. and up, with no difficulties. Additionally, I don't believe >> consumer-grade routers are built with a high quality of care or >> components. >> Since the possibility of damage exists, and since I canNOT tolerate >> failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and >> order for an Intertex SurfinBird IX67 FW AIR GW2 router this morning, >> which may or may not arrive tomorrow via Priority Overnight FedEx, as I >> ordered. This router has 2 FXS and 1 FXO port, along with a built-in SIP >> proxy mini-server and full total integration of that proxy with the >> firewall and with NAT hardware/firmware. This router ALSO supports full >> SIP and other media types on it's 4-port LAN despite other-brand routers' >> omitting that support in total favor of built-in SIP ports that a few do >> have, and the rest who don't have any support for SIP or IAX at "all". >> The cost was over $300 but I feel it is well worth it, since this router >> is a commercial-grade router in addition to it's VoIP/SIP >> speciality-design. I also plan to place it at least 3 feet from the edge >> of the window opening(s). {I only wish it had a metal case too, for a > dd >> ed RF protection since the case can be grounded}. This model also has >> wireless 802.11 b/g support. >> >> After the Intertex is installed and configured, the recordings I spoke of >> previously will be made available. Some will be put on the * box, but I >> think alot will be put on this neat lil device I forgot I had until >> tonight: an AEC (Automation Electronics Corp.) model 712 "The Messenger" >> mini-IVR system. It appears in good shape still; it has 6 line-ports >> (RJ-45), handset port (RJ-11), Remote Change line port (RJ-45), and >> C.O./PBX switchable termination for each of the 6 lines, and a separate >> Ext. MIC jack (which can be used as a line-level input via an attenuating >> mini-phone jack patchcord). With over a dozen function buttons, a >> numeric keypad and a 5-digit LED readout, I think it rises above any >> ordinary consumer-grade voicemail or audio storage system. I wonder if >> any of you fellows have had experience with this or other AEC-brand >> equipment. It seems heavy and of good sturdy quality (with a metal case, >> of course). I found this at one of the many hamfests (Amateur Rad > io >> flea-markets) that I've been to. >> >> You should know that hamfests can be a trove for telephone equipments as >> well, especially collectors. I've seen manual-ring phones, a couple >> fan-tail plunger lineswitches, 500- and 2500- type phones, 1A2 and other >> partial and WHOLE keysystems, and 1 or 2 entire PBXs at some of these >> hamfests, especially the larger hamfests. I have yet to find an entire >> CDO central office, but I've seen a few selectors/connectors since I've >> been a ham or 20 years, as well as a crossbar switch or two, and some >> misc. telephone gear and equipment and parts I wasn't familiar with. If >> any of you live close or within decent traveling distance to Dayton, OH, >> you might want to make the journey there this coming Spring, since it is >> THE LARGEST hamfest in the world with people traveling from outside the >> U.S. to attend it. I believe they still have the site >> http://www.daytonhamvention.com as the official website. >> >> At any rate, I'll update on here as I get this lil gem of mine set up for >> my audio recordings and place it online with 1 or 2 assigned (perhaps >> more) numbers. >> 73's, >> de Jeff (KA3RXE) >> Amateur Radio: A National Resource >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> >> > > -- > Dog is my co-pilot > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ From jnovack at stromberg-carlson.org Sat Feb 2 09:29:19 2008 From: jnovack at stromberg-carlson.org (John Novack) Date: Sat, 02 Feb 2008 10:29:19 -0500 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <3E067B4F3EAD41E5BAA135161FE21DFA@IanPC> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> <47A47C65.3080701@stromberg-carlson.org> <3E067B4F3EAD41E5BAA135161FE21DFA@IanPC> Message-ID: <47A48C4F.7050608@stromberg-carlson.org> I have a 6 port Cisco 3810 with a small fan in it, but it is rack mounted away from my office. Plus it is hard to hear over the "Hummer" My battery charger that I had to press into service after my switcher failed. Funny how poorly the channel banks and SXS system worked when the power plant dropped to 39 volts! Really need to hook up a low battery alarm! John Novack Ian Jolly wrote: > I also have a Linksys 8 FXS ATA and have about half the ports > populated with no problems so far in four weeks. > > The only problem I find is the noise level from the fan! You can hear > it 20 yards away! Does anyone-else have this problem with the fan? > > Ian J > > ----- Original Message ----- From: "John Novack" > > To: "Voice Over IP Tandem for Analog Switches" > Sent: Saturday, February 02, 2008 2:21 PM > Subject: Re: [VoIP] Recordings / My Asterisk & Router > > >> As many of us know, SIP can be a problem, especially with NAT. >> I have both Stanaphone and Gizmo as SIP providers, one is my portal for >> users to access CNET, and although I don't often rely on it for my ONLY >> connection to the PSTN, it mostly works. >> I also have Vonage with their locked ATA on the LAN side of my router. >> I use an 8 port Linksys consumer grade router with no related problems. >> When I used their 4 port version, with different firmware, SIP would die >> after about 18 minutes, sometimes killing all Internet access, sometimes >> coming back. This was with Vonage, Stanaphone and Gizmo. >> Once I changed the router to the 8 port version, I had no more problems. >> It has a completely different problem. My ISP is Comcast, and every so >> often they go on a tear of changing IP addresses, it seems not simply >> for me to annoy me, but they are doing some sort of network >> re-configuration or a fall back network or ??? No sense in calling >> customer service. I get better answers from my dogs! >> So when they are in this mode, I either have to tell the WAN DHCP to >> release and renew, or at times power cycle the router. >> I have no high energy RF to upset my router, as Jeff does. >> I have often though of going up a level or two with routers, but just as >> I explore the current field, things settle down for many weeks/months so >> the issue moves to the back of the line. >> I currently have built a small MonoWall configuration. I may go that >> route. The last time I tried, I had difficulty getting CNET to work, >> though everything else seemed just fine. >> >> Anyone have experience with other routers they would care to share? >> >> John Novack >> >> Spock71 wrote: >>> Everytime I see no messages for a day or so, I think something's >>> wrong with my e-mail client, listserve subscription, or the mail >>> daemon at CNET; but I think it's actually the fact that nobody has >>> anything to say at the time. So, that being the case, I'll add >>> something. >>> >>> I had planned previously to purchase an Intertex router to solve my >>> SIP problems that I've been having with no-audio calls going out >>> from my box completing over that protocol. I decided to hold off >>> thinking the problems would somehow be worked-around, and that, >>> according to John I didn't need a costly router to get everything I >>> want to work on my * box, as IAX calls are great with very few or no >>> difficulties. >>> Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP >>> were prematurely cut off after less than 30 seconds. Now I don't >>> know if that occured as a result of my opening up additional ranges >>> of ports in my Linksys 300N router, or if there was actually a >>> VoicePulse issue. Since I've very rarely had difficulty with >>> VoicePulse actually failing during a SIP call, I prefer to think it >>> is the 'former', or something related to my Linksys 300N. >>> While not very likely due to routers from Linksys I've used before >>> (and placing them in front of my 3-set windows looking S.E.), it is >>> certainly possible that I may have affected the poor lil >>> plastic-enclosed 300N when I transmitted on H.F. frequencies for the >>> first time last night on SSB on 3 bands (160, 80 and 40 meters) with >>> between 40 and 100 Watts RF. Previously, I'd used only the VHF/UHF >>> bands of 2-meters and above, which is 144 MHz. and up, with no >>> difficulties. Additionally, I don't believe consumer-grade routers >>> are built with a high quality of care or components. >>> Since the possibility of damage exists, and since I canNOT tolerate >>> failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and >>> order for an Intertex SurfinBird IX67 FW AIR GW2 router this >>> morning, which may or may not arrive tomorrow via Priority Overnight >>> FedEx, as I ordered. This router has 2 FXS and 1 FXO port, along >>> with a built-in SIP proxy mini-server and full total integration of >>> that proxy with the firewall and with NAT hardware/firmware. This >>> router ALSO supports full SIP and other media types on it's 4-port >>> LAN despite other-brand routers' omitting that support in total >>> favor of built-in SIP ports that a few do have, and the rest who >>> don't have any support for SIP or IAX at "all". The cost was over >>> $300 but I feel it is well worth it, since this router is a >>> commercial-grade router in addition to it's VoIP/SIP >>> speciality-design. I also plan to place it at least 3 feet from the >>> edge of the window opening(s). {I only wish it had a metal case >>> too, for a >> dd >>> ed RF protection since the case can be grounded}. This model also >>> has wireless 802.11 b/g support. >>> >>> After the Intertex is installed and configured, the recordings I >>> spoke of previously will be made available. Some will be put on the >>> * box, but I think alot will be put on this neat lil device I forgot >>> I had until tonight: an AEC (Automation Electronics Corp.) model 712 >>> "The Messenger" mini-IVR system. It appears in good shape still; it >>> has 6 line-ports (RJ-45), handset port (RJ-11), Remote Change line >>> port (RJ-45), and C.O./PBX switchable termination for each of the 6 >>> lines, and a separate Ext. MIC jack (which can be used as a >>> line-level input via an attenuating mini-phone jack patchcord). >>> With over a dozen function buttons, a numeric keypad and a 5-digit >>> LED readout, I think it rises above any ordinary consumer-grade >>> voicemail or audio storage system. I wonder if any of you fellows >>> have had experience with this or other AEC-brand equipment. It >>> seems heavy and of good sturdy quality (with a metal case, of >>> course). I found this at one of the many hamfests (Amateur Rad >> io >>> flea-markets) that I've been to. >>> >>> You should know that hamfests can be a trove for telephone >>> equipments as well, especially collectors. I've seen manual-ring >>> phones, a couple fan-tail plunger lineswitches, 500- and 2500- type >>> phones, 1A2 and other partial and WHOLE keysystems, and 1 or 2 >>> entire PBXs at some of these hamfests, especially the larger >>> hamfests. I have yet to find an entire CDO central office, but I've >>> seen a few selectors/connectors since I've been a ham or 20 years, >>> as well as a crossbar switch or two, and some misc. telephone gear >>> and equipment and parts I wasn't familiar with. If any of you live >>> close or within decent traveling distance to Dayton, OH, you might >>> want to make the journey there this coming Spring, since it is THE >>> LARGEST hamfest in the world with people traveling from outside the >>> U.S. to attend it. I believe they still have the site >>> http://www.daytonhamvention.com as the official website. >>> >>> At any rate, I'll update on here as I get this lil gem of mine set >>> up for my audio recordings and place it online with 1 or 2 assigned >>> (perhaps more) numbers. >>> 73's, >>> de Jeff (KA3RXE) Amateur Radio: A National Resource >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >>> >>> >> >> -- >> Dog is my co-pilot >> >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ > > -- Dog is my co-pilot From jjones3601 at yahoo.com Sat Feb 2 11:18:48 2008 From: jjones3601 at yahoo.com (john jones) Date: Sat, 2 Feb 2008 09:18:48 -0800 (PST) Subject: [VoIP] Recordings / My Asterisk & Router Message-ID: <253664.40924.qm@web34308.mail.mud.yahoo.com> I have unplugged the fans from many (non-commercial) routers and never had one blow up fro overheating. IMO, if it is comfortable enough for people, the fan is probably optional. John ----- Original Message ---- From: John Novack To: Ian Jolly Cc: Voice Over IP Tandem for Analog Switches Sent: Saturday, February 2, 2008 10:29:19 AM Subject: Re: [VoIP] Recordings / My Asterisk & Router I have a 6 port Cisco 3810 with a small fan in it, but it is rack mounted away from my office. Plus it is hard to hear over the "Hummer" My battery charger that I had to press into service after my switcher failed. Funny how poorly the channel banks and SXS system worked when the power plant dropped to 39 volts! Really need to hook up a low battery alarm! John Novack Ian Jolly wrote: > I also have a Linksys 8 FXS ATA and have about half the ports > populated with no problems so far in four weeks. > > The only problem I find is the noise level from the fan! You can hear > it 20 yards away! Does anyone-else have this problem with the fan? > > Ian J > > ----- Original Message ----- From: "John Novack" > > To: "Voice Over IP Tandem for Analog Switches" > Sent: Saturday, February 02, 2008 2:21 PM > Subject: Re: [VoIP] Recordings / My Asterisk & Router > > >> As many of us know, SIP can be a problem, especially with NAT. >> I have both Stanaphone and Gizmo as SIP providers, one is my portal for >> users to access CNET, and although I don't often rely on it for my ONLY >> connection to the PSTN, it mostly works. >> I also have Vonage with their locked ATA on the LAN side of my router. >> I use an 8 port Linksys consumer grade router with no related problems. >> When I used their 4 port version, with different firmware, SIP would die >> after about 18 minutes, sometimes killing all Internet access, sometimes >> coming back. This was with Vonage, Stanaphone and Gizmo. >> Once I changed the router to the 8 port version, I had no more problems. >> It has a completely different problem. My ISP is Comcast, and every so >> often they go on a tear of changing IP addresses, it seems not simply >> for me to annoy me, but they are doing some sort of network >> re-configuration or a fall back network or ??? No sense in calling >> customer service. I get better answers from my dogs! >> So when they are in this mode, I either have to tell the WAN DHCP to >> release and renew, or at times power cycle the router. >> I have no high energy RF to upset my router, as Jeff does. >> I have often though of going up a level or two with routers, but just as >> I explore the current field, things settle down for many weeks/months so >> the issue moves to the back of the line. >> I currently have built a small MonoWall configuration. I may go that >> route. The last time I tried, I had difficulty getting CNET to work, >> though everything else seemed just fine. >> >> Anyone have experience with other routers they would care to share? >> >> John Novack >> >> Spock71 wrote: >>> Everytime I see no messages for a day or so, I think something's >>> wrong with my e-mail client, listserve subscription, or the mail >>> daemon at CNET; but I think it's actually the fact that nobody has >>> anything to say at the time. So, that being the case, I'll add >>> something. >>> >>> I had planned previously to purchase an Intertex router to solve my >>> SIP problems that I've been having with no-audio calls going out >>> from my box completing over that protocol. I decided to hold off >>> thinking the problems would somehow be worked-around, and that, >>> according to John I didn't need a costly router to get everything I >>> want to work on my * box, as IAX calls are great with very few or no >>> difficulties. >>> Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP >>> were prematurely cut off after less than 30 seconds. Now I don't >>> know if that occured as a result of my opening up additional ranges >>> of ports in my Linksys 300N router, or if there was actually a >>> VoicePulse issue. Since I've very rarely had difficulty with >>> VoicePulse actually failing during a SIP call, I prefer to think it >>> is the 'former', or something related to my Linksys 300N. >>> While not very likely due to routers from Linksys I've used before >>> (and placing them in front of my 3-set windows looking S.E.), it is >>> certainly possible that I may have affected the poor lil >>> plastic-enclosed 300N when I transmitted on H.F. frequencies for the >>> first time last night on SSB on 3 bands (160, 80 and 40 meters) with >>> between 40 and 100 Watts RF. Previously, I'd used only the VHF/UHF >>> bands of 2-meters and above, which is 144 MHz. and up, with no >>> difficulties. Additionally, I don't believe consumer-grade routers >>> are built with a high quality of care or components. >>> Since the possibility of damage exists, and since I canNOT tolerate >>> failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and >>> order for an Intertex SurfinBird IX67 FW AIR GW2 router this >>> morning, which may or may not arrive tomorrow via Priority Overnight >>> FedEx, as I ordered. This router has 2 FXS and 1 FXO port, along >>> with a built-in SIP proxy mini-server and full total integration of >>> that proxy with the firewall and with NAT hardware/firmware. This >>> router ALSO supports full SIP and other media types on it's 4-port >>> LAN despite other-brand routers' omitting that support in total >>> favor of built-in SIP ports that a few do have, and the rest who >>> don't have any support for SIP or IAX at "all". The cost was over >>> $300 but I feel it is well worth it, since this router is a >>> commercial-grade router in addition to it's VoIP/SIP >>> speciality-design. I also plan to place it at least 3 feet from the >>> edge of the window opening(s). {I only wish it had a metal case >>> too, for a >> dd >>> ed RF protection since the case can be grounded}. This model also >>> has wireless 802.11 b/g support. >>> >>> After the Intertex is installed and configured, the recordings I >>> spoke of previously will be made available. Some will be put on the >>> * box, but I think alot will be put on this neat lil device I forgot >>> I had until tonight: an AEC (Automation Electronics Corp.) model 712 >>> "The Messenger" mini-IVR system. It appears in good shape still; it >>> has 6 line-ports (RJ-45), handset port (RJ-11), Remote Change line >>> port (RJ-45), and C.O./PBX switchable termination for each of the 6 >>> lines, and a separate Ext. MIC jack (which can be used as a >>> line-level input via an attenuating mini-phone jack patchcord). >>> With over a dozen function buttons, a numeric keypad and a 5-digit >>> LED readout, I think it rises above any ordinary consumer-grade >>> voicemail or audio storage system. I wonder if any of you fellows >>> have had experience with this or other AEC-brand equipment. It >>> seems heavy and of good sturdy quality (with a metal case, of >>> course). I found this at one of the many hamfests (Amateur Rad >> io >>> flea-markets) that I've been to. >>> >>> You should know that hamfests can be a trove for telephone >>> equipments as well, especially collectors. I've seen manual-ring >>> phones, a couple fan-tail plunger lineswitches, 500- and 2500- type >>> phones, 1A2 and other partial and WHOLE keysystems, and 1 or 2 >>> entire PBXs at some of these hamfests, especially the larger >>> hamfests. I have yet to find an entire CDO central office, but I've >>> seen a few selectors/connectors since I've been a ham or 20 years, >>> as well as a crossbar switch or two, and some misc. telephone gear >>> and equipment and parts I wasn't familiar with. If any of you live >>> close or within decent traveling distance to Dayton, OH, you might >>> want to make the journey there this coming Spring, since it is THE >>> LARGEST hamfest in the world with people traveling from outside the >>> U.S. to attend it. I believe they still have the site >>> http://www.daytonhamvention.com as the official website. >>> >>> At any rate, I'll update on here as I get this lil gem of mine set >>> up for my audio recordings and place it online with 1 or 2 assigned >>> (perhaps more) numbers. >>> 73's, >>> de Jeff (KA3RXE) Amateur Radio: A National Resource >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >>> >>> >> >> -- >> Dog is my co-pilot >> >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ > > -- Dog is my co-pilot _______________________________________________ VoIP mailing list VoIP at ckts.info http://lists.ckts.info/mailman/listinfo/voip Project Web Page: http://www.ckts.info/ From windmill at topletter.com Sat Feb 2 09:04:30 2008 From: windmill at topletter.com (windmill) Date: Sat, 02 Feb 2008 15:04:30 +0000 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <47A47C65.3080701@stromberg-carlson.org> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> <47A47C65.3080701@stromberg-carlson.org> Message-ID: <47A4867E.8020800@topletter.com> John, here in the UK I'm using a Belkin G+MIMO router, prior to this I was using a Netgear DG834 which I only changed because it got zapped in a storm though I have its replacement kindly supplied by netgear under guarantee and I also have a spare Belkin G+MIMO just in case the worst should happen again. Both the Netgear and the Belkin routers have worked well though I have at times had issues with my 512Kb broadband service. Both I and my ISP see the problems as being on the BT network but BT always claims there is nothing wrong. If anything I have found that SIP and IAX works better over my broadband connection than either email or website browsing and generally I have had few problems talking using IAX and SIP IP phones or analogue phones on SIP ATAs. I think my longest call was with Ian Jolly a few weeks ago now which was several hours as I recall with just a single dropout but excellent transmission each way. Most of my calls are around 20-30 minutes minimum but anyone will tell you I can talk for England if they let me and minutes soon run into hours. One thing I will say is that when I have used SIP i.e. when talking to a person hosted on my *box and using only a softphone and headset all the problems have been audio in nature and due entirely to the headset as far as I can tell. One thing is that I have no RTP ports forwarded in my router at all so it is up to * to open them as it requires them. As far as I can tell this has caused me no problems when traversing NAT. Strangely I have found that sometimes my IAX2 phones will lock up if I call Ian's or Jon Kay's DISA gateways and I haven't discovered why. It does very rarely happen to my SIP phones though having said that it has never happened with my Aastra 9112 so maybe that is a case of 'you get what you pay for'! One thing I did do was seperate as far as possible voice and data traffic, I have my main Windows PC which is online 24/7 connected to my router, the only other connection to it being from a Netgear Gigabit 5 port switch which I installed when I was having lockup problems that I associated with faults on the BT backbone somehow affecting my router. This has worked well as the Gigabit switch marshalls my local SIP phones and FXS port and the main cat 5 network which in turn has a 16 port distibution switch connected to two *boxes and further local SIP and IAX2 phones and also to an 8 port switch (with my third *box, third Windows PC, local IAX2 phone and FXS ports) and a 5 port switch (with 2nd Windows PC, FXS ports and IAX2 phone). At some point I intend to futher split the voice from the data by introducing additional switches and wireless routers which I bought last year. Currently I am not using wireless anywhere in my network and have it disabled in the router. Brian John Novack wrote: > As many of us know, SIP can be a problem, especially with NAT. > I have both Stanaphone and Gizmo as SIP providers, one is my portal for > users to access CNET, and although I don't often rely on it for my ONLY > connection to the PSTN, it mostly works. > I also have Vonage with their locked ATA on the LAN side of my router. > I use an 8 port Linksys consumer grade router with no related problems. > When I used their 4 port version, with different firmware, SIP would die > after about 18 minutes, sometimes killing all Internet access, sometimes > coming back. This was with Vonage, Stanaphone and Gizmo. > Once I changed the router to the 8 port version, I had no more problems. > It has a completely different problem. My ISP is Comcast, and every so > often they go on a tear of changing IP addresses, it seems not simply > for me to annoy me, but they are doing some sort of network > re-configuration or a fall back network or ??? No sense in calling > customer service. I get better answers from my dogs! > So when they are in this mode, I either have to tell the WAN DHCP to > release and renew, or at times power cycle the router. > I have no high energy RF to upset my router, as Jeff does. > I have often though of going up a level or two with routers, but just as > I explore the current field, things settle down for many weeks/months so > the issue moves to the back of the line. > I currently have built a small MonoWall configuration. I may go that > route. The last time I tried, I had difficulty getting CNET to work, > though everything else seemed just fine. > > Anyone have experience with other routers they would care to share? > > John Novack > > Spock71 wrote: > >> Everytime I see no messages for a day or so, I think something's wrong with my e-mail client, listserve subscription, or the mail daemon at CNET; but I think it's actually the fact that nobody has anything to say at the time. So, that being the case, I'll add something. >> >> I had planned previously to purchase an Intertex router to solve my SIP problems that I've been having with no-audio calls going out from my box completing over that protocol. I decided to hold off thinking the problems would somehow be worked-around, and that, according to John I didn't need a costly router to get everything I want to work on my * box, as IAX calls are great with very few or no difficulties. >> Now this evening, 2 of my PSTN calls (via VoicePulse) over my ITSP were prematurely cut off after less than 30 seconds. Now I don't know if that occured as a result of my opening up additional ranges of ports in my Linksys 300N router, or if there was actually a VoicePulse issue. Since I've very rarely had difficulty with VoicePulse actually failing during a SIP call, I prefer to think it is the 'former', or something related to my Linksys 300N. >> While not very likely due to routers from Linksys I've used before (and placing them in front of my 3-set windows looking S.E.), it is certainly possible that I may have affected the poor lil plastic-enclosed 300N when I transmitted on H.F. frequencies for the first time last night on SSB on 3 bands (160, 80 and 40 meters) with between 40 and 100 Watts RF. Previously, I'd used only the VHF/UHF bands of 2-meters and above, which is 144 MHz. and up, with no difficulties. Additionally, I don't believe consumer-grade routers are built with a high quality of care or components. >> Since the possibility of damage exists, and since I canNOT tolerate failure on SIP over my ITSPs VoicePulse and BroadVoice, I placed and order for an Intertex SurfinBird IX67 FW AIR GW2 router this morning, which may or may not arrive tomorrow via Priority Overnight FedEx, as I ordered. This router has 2 FXS and 1 FXO port, along with a built-in SIP proxy mini-server and full total integration of that proxy with the firewall and with NAT hardware/firmware. This router ALSO supports full SIP and other media types on it's 4-port LAN despite other-brand routers' omitting that support in total favor of built-in SIP ports that a few do have, and the rest who don't have any support for SIP or IAX at "all". The cost was over $300 but I feel it is well worth it, since this router is a commercial-grade router in addition to it's VoIP/SIP speciality-design. I also plan to place it at least 3 feet from the edge of the window opening(s). {I only wish it had a metal case too, for a >> > dd > >> ed RF protection since the case can be grounded}. This model also has wireless 802.11 b/g support. >> >> After the Intertex is installed and configured, the recordings I spoke of previously will be made available. Some will be put on the * box, but I think alot will be put on this neat lil device I forgot I had until tonight: an AEC (Automation Electronics Corp.) model 712 "The Messenger" mini-IVR system. It appears in good shape still; it has 6 line-ports (RJ-45), handset port (RJ-11), Remote Change line port (RJ-45), and C.O./PBX switchable termination for each of the 6 lines, and a separate Ext. MIC jack (which can be used as a line-level input via an attenuating mini-phone jack patchcord). With over a dozen function buttons, a numeric keypad and a 5-digit LED readout, I think it rises above any ordinary consumer-grade voicemail or audio storage system. I wonder if any of you fellows have had experience with this or other AEC-brand equipment. It seems heavy and of good sturdy quality (with a metal case, of course). I found this at one of the many hamfests (Amateur Rad >> > io > >> flea-markets) that I've been to. >> >> You should know that hamfests can be a trove for telephone equipments as well, especially collectors. I've seen manual-ring phones, a couple fan-tail plunger lineswitches, 500- and 2500- type phones, 1A2 and other partial and WHOLE keysystems, and 1 or 2 entire PBXs at some of these hamfests, especially the larger hamfests. I have yet to find an entire CDO central office, but I've seen a few selectors/connectors since I've been a ham or 20 years, as well as a crossbar switch or two, and some misc. telephone gear and equipment and parts I wasn't familiar with. If any of you live close or within decent traveling distance to Dayton, OH, you might want to make the journey there this coming Spring, since it is THE LARGEST hamfest in the world with people traveling from outside the U.S. to attend it. I believe they still have the site http://www.daytonhamvention.com as the official website. >> >> At any rate, I'll update on here as I get this lil gem of mine set up for my audio recordings and place it online with 1 or 2 assigned (perhaps more) numbers. >> 73's, >> de Jeff (KA3RXE) Amateur Radio: A National Resource >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> >> >> > > From windmill at topletter.com Sat Feb 2 09:47:31 2008 From: windmill at topletter.com (windmill) Date: Sat, 02 Feb 2008 15:47:31 +0000 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <3E067B4F3EAD41E5BAA135161FE21DFA@IanPC> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> <47A47C65.3080701@stromberg-carlson.org> <3E067B4F3EAD41E5BAA135161FE21DFA@IanPC> Message-ID: <47A49093.1060007@topletter.com> Ian, Hands up to that on my Lounge PC! Strangely that PC has a silencer on it but my IAX2 phone, two analogue phones on a Linksys pap2 and the USB handset attached to the Zoiper all pick up the fan noise! Brian Ian Jolly wrote: > I also have a Linksys 8 FXS ATA and have about half the ports populated with > no problems so far in four weeks. > > The only problem I find is the noise level from the fan! You can hear it 20 > yards away! Does anyone-else have this problem with the fan? > > Ian J From chad at maine.edu Sun Feb 3 08:26:11 2008 From: chad at maine.edu (Chad Perkins) Date: Sun, 03 Feb 2008 09:26:11 -0500 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <47A47C65.3080701@stromberg-carlson.org> References: <001a01c8653c$b8ff6e90$0b01a8c0@spockraptor> Message-ID: <47A588B3.18144.2FB2DD@localhost> On 2 Feb 2008 at 9:21, John Novack wrote: [big snip] > Anyone have experience with other routers they would care to share? > John Novack I used to run IAX and SIP through Smoothwall back in my cable modem days with no trouble (I switched to DSL a couple years back at the same speed but $15 less per month when VZ upgraded their plans here in the northeast). I would do it again if I could squeeze the likes of Smoothwall or IP cop into a Linksys WRT54Gx something (I have no desire to go back to a(nother) full PC based platform for my Internet firewall/router). As most on the list are probably aware, when it comes to routers, different firmwares/different manufactures handle some rather transparent things like NAT somewhat differently. This can raise hell with SIP (and H.323) in particular (whereas IAX(2) as a single port protocol is designed to work in this environment). This trouble can get really ugly if you have more than one SIP device connecting out to two or SIP providers on the Internet; some of these routers get really confused and can't figure out where and when to send which packets to. In some cases you may be able to use a different "non-standard" port number for the second SIP connection (i.e. 5061 instead of 5060), but you may also need to use a different port range (and port forwarding) for the RTP protocol that actually carries the voice streams (in a strict sense, SIP is just a signalling protocol). Terminating multiple SIP connections one device is bad enough; terminating multiple SIP connections on multiple devices, especially on consumer grade products is more often that not going lead to major frustration if not a "train wreck". Chad From chad at maine.edu Sun Feb 3 08:39:41 2008 From: chad at maine.edu (Chad Perkins) Date: Sun, 03 Feb 2008 09:39:41 -0500 Subject: [VoIP] Recordings / My Asterisk & Router In-Reply-To: <47A588B3.18144.2FB2DD@localhost> References: <47A47C65.3080701@stromberg-carlson.org> Message-ID: <47A58BDD.31111.3C113B@localhost> On 3 Feb 2008 at 9:26, I wrote: [snip] > Terminating multiple SIP connections one device is bad enough; > terminating multiple SIP connections on multiple devices, especially > on consumer grade products is more often that not going lead to major > frustration if not a "train wreck". I neglected to mention that when it comes to multiple devices on the LAN via a NAT router, terminating VoIP connections using the same protocol you're typically going to have problems; IAX(2) or any other protocol is not totally immune in this scenario. A SIP device and an IAX device typically can coexist without any coexistance issues. chad From madmanmarkau at hotmail.com Sun Feb 3 22:35:12 2008 From: madmanmarkau at hotmail.com (Mad Mark) Date: Mon, 4 Feb 2008 04:35:12 +0000 Subject: [VoIP] Spotted On Ebay Message-ID: Someone on the CNET-UK-I mailing list spotted these items on E-Bay: 130193124276 130193124377 130193124440 I'm just wondering if they could be used in conjunction with my Strowger 2000-type rotary final selector, to maybe construct some kind of frankenswitch. There's only about 4:30 left on the auctions, so I'm hurrying. Any thoughts, anyone? _________________________________________________________________ Overpaid or Underpaid? Check our comprehensive Salary Centre http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fcontent%2Emycareer%2Ecom%2Eau%2Fsalary%2Dcentre%3Fs%5Fcid%3D595810&_t=766724125&_r=Hotmail_Email_Tagline_MyCareer_Oct07&_m=EXT From stfkerman at jps.net Sun Feb 3 22:56:33 2008 From: stfkerman at jps.net (Steph Kerman) Date: Sun, 03 Feb 2008 23:56:33 -0500 Subject: [VoIP] Spotted On Ebay In-Reply-To: References: Message-ID: <47A69B01.5070005@jps.net> My thoughts are that the photos are so small that even though I am somewhat familiar with British equipment and highly familiar with North American equipment, IMO not enough can be determined about them to be confident that they would be useful. Very specific details about these kinds of parts determines whether they will fit a specific application. If you had seen these earlier and gotten more info from the seller, that might have given more certainty. Are you in Oz, such that they would not need to be shipped internationally? I should add that I don't know what the exchange rate is so I can't judge the pricing. Steph Mad Mark wrote: > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: > > 130193124276 > 130193124377 > 130193124440 > > I'm just wondering if they could be used in conjunction with my Strowger 2000-type rotary final selector, to maybe construct some kind of frankenswitch. There's only about 4:30 left on the auctions, so I'm hurrying. > > Any thoughts, anyone? > > From madmanmarkau at hotmail.com Sun Feb 3 23:09:08 2008 From: madmanmarkau at hotmail.com (Mad Mark) Date: Mon, 4 Feb 2008 05:09:08 +0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <47A69B01.5070005@jps.net> References: <47A69B01.5070005@jps.net> Message-ID: Yeah, I'm in Oz, so shipping is fairly cheap. I'll bid on them - if they don't work/can't be used, they can always go into my collection as show pieces or something. And I believe the seller doesn't know too much about them. I *think* (s)he is auctioning off his/her deceased uncles possessions, and is not into telephone equipment themselves. Thanks. > Date: Sun, 3 Feb 2008 23:56:33 -0500 > From: stfkerman at jps.net > To: voip at ckts.info > Subject: Re: [VoIP] Spotted On Ebay > > My thoughts are that the photos are so small that even though I am > somewhat familiar with British equipment and highly familiar with North > American equipment, IMO not enough can be determined about them to be > confident that they would be useful. > > Very specific details about these kinds of parts determines whether they > will fit a specific application. If you had seen these earlier and > gotten more info from the seller, that might have given more certainty. > > Are you in Oz, such that they would not need to be shipped > internationally? I should add that I don't know what the exchange rate > is so I can't judge the pricing. > > Steph > > Mad Mark wrote: > > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: > > > > 130193124276 > > 130193124377 > > 130193124440 > > > > I'm just wondering if they could be used in conjunction with my Strowger 2000-type rotary final selector, to maybe construct some kind of frankenswitch. There's only about 4:30 left on the auctions, so I'm hurrying. > > > > Any thoughts, anyone? > > > > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ _________________________________________________________________ Overpaid or Underpaid? Check our comprehensive Salary Centre http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fcontent%2Emycareer%2Ecom%2Eau%2Fsalary%2Dcentre%3Fs%5Fcid%3D595810&_t=766724125&_r=Hotmail_Email_Tagline_MyCareer_Oct07&_m=EXT From stfkerman at jps.net Sun Feb 3 23:15:22 2008 From: stfkerman at jps.net (Steph Kerman) Date: Mon, 04 Feb 2008 00:15:22 -0500 Subject: [VoIP] Spotted On Ebay In-Reply-To: References: <47A69B01.5070005@jps.net> Message-ID: <47A69F6A.6010508@jps.net> Mad Mark wrote: > Yeah, I'm in Oz, so shipping is fairly cheap. I'll bid on them - if > they don't work/can't be used, they can always go into my collection > as show pieces or something. For that purpose they'll probably work without even any adjustment! Some of them look to be unusual pieces at that and worth having for display in their own right. > And I believe the seller doesn't know too much about them. I *think* > (s)he is auctioning off his/her deceased uncles possessions, and is > not into telephone equipment themselves. Certainly my take too. And so inexperienced on eBay as to not understand the need to post reasonable size pix. > Thanks. YW Steph > >> Date: Sun, 3 Feb 2008 23:56:33 -0500 >> From: stfkerman at jps.net >> To: voip at ckts.info >> Subject: Re: [VoIP] Spotted On Ebay >> >> My thoughts are that the photos are so small that even though I am >> somewhat familiar with British equipment and highly familiar with North >> American equipment, IMO not enough can be determined about them to be >> confident that they would be useful. >> >> Very specific details about these kinds of parts determines whether they >> will fit a specific application. If you had seen these earlier and >> gotten more info from the seller, that might have given more certainty. >> >> Are you in Oz, such that they would not need to be shipped >> internationally? I should add that I don't know what the exchange rate >> is so I can't judge the pricing. >> >> Steph >> >> Mad Mark wrote: >> >>> Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >>> >>> 130193124276 >>> 130193124377 >>> 130193124440 >>> >>> I'm just wondering if they could be used in conjunction with my Strowger 2000-type rotary final selector, to maybe construct some kind of frankenswitch. There's only about 4:30 left on the auctions, so I'm hurrying. >>> >>> Any thoughts, anyone? >>> >>> >>> >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> > > _________________________________________________________________ > Overpaid or Underpaid? Check our comprehensive Salary Centre > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fcontent%2Emycareer%2Ecom%2Eau%2Fsalary%2Dcentre%3Fs%5Fcid%3D595810&_t=766724125&_r=Hotmail_Email_Tagline_MyCareer_Oct07&_m=EXT > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > > From gijones at clear.net.nz Mon Feb 4 00:26:51 2008 From: gijones at clear.net.nz (gijones@clear.net.nz) Date: Mon, 04 Feb 2008 19:26:51 +1300 Subject: [VoIP] Spotted On Ebay References: <47A69B01.5070005@jps.net> Message-ID: <003501c866f6$ee13eb90$1401a8c0@DellWinPc> So long as its are operational you should be able to make something out of the large uniselector. You might be able to make a subscribers linefinder but you would really need more then one. With a bit of imagination you could possibly wire it so you have an extension connected to some of the set of contacts around the edge . Then with some relays for subscriber line relay and cut off relay. You could wire it so when any extension is picked up the uniselector hunts until it finds that extension. Then it connects to your one final selector allowing you to have a two digit numbering system for your telephone exchange. Another use maybe in what they call a pulse set. These are normaly where the ring tones, dial tones etc can be feed to different contatcs on the uniselector. For example on one set of contacts around the outside you might wire the contacts together in certain groups to give ring tone cadence. Eg 5 contacts next to each other might be wired to the ring tone and each other then the next two aren't then the next 5 are etc. So for five steps the wiper tag has ring tone on it you can use to ring the called phone. The next two give silence then 5 steps give ringing etc You get the idea. But if no one has told you already try and get hold of a book called "telephony" volume 2 Automatic Exchange systems by Atkinson . There are earlier editions known by the authors name Herbert, Proctor. An edition from 1960's or '70's will be a great help to you. Apparently it use to be the bible for exchange technicians. It goes through explanations of different basic circuits in the exchange such as hunting, testing, holding circuits, how selectors work etc. It is well worth getting hold of a copy you will learn a lot from it and can use it to help you design a basic mini exchange. You may have to use one of those international secondhand book sellers on the web. But if you buy one book to help you, you need Atkinson. I am still hunting for parts to build a model exchange myself. But as I am a volunteer in Telecommunications at a museuem I get to play with old gear and have experienced techs around me to teach me. Good luck I look forward to calling into your exchange. Brent ----- Original Message ----- From: "Mad Mark" To: "Voice Over IP Tandem for Analog Switches" Sent: Monday, February 04, 2008 6:09 PM Subject: Re: [VoIP] Spotted On Ebay > > Yeah, I'm in Oz, so shipping is fairly cheap. I'll bid on them - if they > don't work/can't be used, they can always go into my collection as show > pieces or something. > > And I believe the seller doesn't know too much about them. I *think* (s)he > is auctioning off his/her deceased uncles possessions, and is not into > telephone equipment themselves. > > Thanks. > >> Date: Sun, 3 Feb 2008 23:56:33 -0500 >> From: stfkerman at jps.net >> To: voip at ckts.info >> Subject: Re: [VoIP] Spotted On Ebay >> >> My thoughts are that the photos are so small that even though I am >> somewhat familiar with British equipment and highly familiar with North >> American equipment, IMO not enough can be determined about them to be >> confident that they would be useful. >> >> Very specific details about these kinds of parts determines whether they >> will fit a specific application. If you had seen these earlier and >> gotten more info from the seller, that might have given more certainty. >> >> Are you in Oz, such that they would not need to be shipped >> internationally? I should add that I don't know what the exchange rate >> is so I can't judge the pricing. >> >> Steph >> >> Mad Mark wrote: >> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >> > >> > 130193124276 >> > 130193124377 >> > 130193124440 >> > >> > I'm just wondering if they could be used in conjunction with my >> > Strowger 2000-type rotary final selector, to maybe construct some kind >> > of frankenswitch. There's only about 4:30 left on the auctions, so I'm >> > hurrying. >> > >> > Any thoughts, anyone? >> > >> > >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ > > _________________________________________________________________ > Overpaid or Underpaid? Check our comprehensive Salary Centre > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fcontent%2Emycareer%2Ecom%2Eau%2Fsalary%2Dcentre%3Fs%5Fcid%3D595810&_t=766724125&_r=Hotmail_Email_Tagline_MyCareer_Oct07&_m=EXT > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.19.19/1257 - Release Date: > 3/02/2008 5:49 p.m. > > From stfkerman at jps.net Mon Feb 4 00:56:30 2008 From: stfkerman at jps.net (Steph Kerman) Date: Mon, 04 Feb 2008 01:56:30 -0500 Subject: [VoIP] Fundamentals of Antique Strowger In-Reply-To: <47A2B211.40105@telis.org> References: <47A2AA9A.5010502@telis.org> <47A2AFA4.1060909@jps.net> <47A2B211.40105@telis.org> Message-ID: <47A6B71E.4000701@jps.net> Mark (and others), Here are a couple of messages that didn't make it here and are very worthy of cross-posting. I think they are for the most part self-explanatory. At the time this book was published, Keith "plunger" lineswitches and rotary lineswitches (what are referred to as Subscriber Uniselectors in BPO parlance) were all that existed. The 2-motion Linefinder was about to be introduced. From the viewpoint of North American practice this is a major area not covered since LFs were very widely used here, much more widely than in the UK it seems. However these books are very worthwhile despite that for the breadth of coverage and the view they give of the early days. And you can't beat the price! IMO Jim deserves many thanks from the wannabe electro-mechanical switcher community for the effort he put into this. He is not on this list AFAIK but his address is in the CC. (More comments at the bottom) Jim Burnham wrote: > I've scanned and posted for download the first half of Smith & > Campbells' Automatic Telephony, 1921 edition. It's about 60mb and can > be had from - > > www.aircraftmanuals.us/phone/automatic-telephony.pdf > > The second half will be posted by Sunday evening or so. There are no > restrictions on this - it's available for all. Index it, OCR it, sell > it, give it away, it matters not to me. It makes fun gifts for the > whole family. Jim Burnham wrote: > I've scanned and posted for download the second half of Smith & > Campbell's Automatic Telephony, 1921 edition. > > It's about 68mb and can be downloaded from - > > www.aircraftmanuals.us/phone/automatic-telephony-2.pdf > > > The first half is still available at - > > www.aircraftmanuals.us/phone/automatic-telephony.pdf > > Dialup users - download at your own peril. The total size will be > around 125MB > > > Enjoy. > > Jim Burnham In reply, someone pointed out that Google also scanned the book and that their entire volume was only about 11 MB instead of 2 x 68 MB. That's because the scan quality is much much lower. A discussion about quality ensued as a result of that comment. I downloaded both forms of it so I have it for purposes of future extracting purposes. I own a copy of the book. Steph From madmanmarkau at hotmail.com Mon Feb 4 01:11:30 2008 From: madmanmarkau at hotmail.com (Mad Mark) Date: Mon, 4 Feb 2008 07:11:30 +0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <003501c866f6$ee13eb90$1401a8c0@DellWinPc> References: <47A69B01.5070005@jps.net> <003501c866f6$ee13eb90$1401a8c0@DellWinPc> Message-ID: Yeah, I know about the "Telephony" book by Atkinson. I know someone with a 5-volume set called "Telephony" but I don't think it's by Atkinson, according to reports I've received, as the Atkinson one didn't have 5 volumes. But this 5-volume set was described to me as "the bible of step-by-step." I haven't been able to get in contact with the guy since I bought the final selector from him, but I plan on nabbing that 5-volume set he has. Funds permitting, of course. > Date: Mon, 4 Feb 2008 19:26:51 +1300 > From: gijones at clear.net.nz > To: voip at ckts.info > Subject: Re: [VoIP] Spotted On Ebay > > So long as its are operational you should be able to make something out of > the large uniselector. > > You might be able to make a subscribers linefinder but you would really need > more then one. > > With a bit of imagination you could possibly wire it so you have an > extension connected to some of the set of contacts around the edge . > Then with some relays for subscriber line relay and cut off relay. You could > wire it so when any extension is picked up the uniselector hunts until > it finds that extension. Then it connects to your one final selector > allowing you to have a two digit numbering system for your telephone > exchange. > > Another use maybe in what they call a pulse set. These are normaly where > the ring tones, dial tones etc can be feed to different contatcs on the > uniselector. > For example on one set of contacts around the outside you might wire the > contacts together in certain groups to give ring tone cadence. Eg 5 > contacts next to each other might be wired to the ring tone and each other > then the next two aren't then the next 5 are etc. So for five steps the > wiper tag has ring tone on it you can use to ring the called phone. The > next two give silence then 5 steps give ringing etc > You get the idea. > > But if no one has told you already try and get hold of a book called > "telephony" volume 2 Automatic Exchange systems by Atkinson . There are > earlier editions known by the authors name Herbert, Proctor. An edition > from 1960's or '70's will be a great help to you. Apparently it use to be > the bible for exchange technicians. > It goes through explanations of different basic circuits in the exchange > such as hunting, testing, holding circuits, how selectors work etc. > > It is well worth getting hold of a copy you will learn a lot from it and can > use it to help you design a basic mini exchange. > You may have to use one of those international secondhand book sellers on > the web. > But if you buy one book to help you, you need Atkinson. > > I am still hunting for parts to build a model exchange myself. But as I am > a volunteer in Telecommunications at a museuem I get to play with old gear > and have experienced techs around me to teach me. > > Good luck I look forward to calling into your exchange. > > Brent > > > > > ----- Original Message ----- > From: "Mad Mark" > To: "Voice Over IP Tandem for Analog Switches" > Sent: Monday, February 04, 2008 6:09 PM > Subject: Re: [VoIP] Spotted On Ebay > > > > > > Yeah, I'm in Oz, so shipping is fairly cheap. I'll bid on them - if they > > don't work/can't be used, they can always go into my collection as show > > pieces or something. > > > > And I believe the seller doesn't know too much about them. I *think* (s)he > > is auctioning off his/her deceased uncles possessions, and is not into > > telephone equipment themselves. > > > > Thanks. > > > >> Date: Sun, 3 Feb 2008 23:56:33 -0500 > >> From: stfkerman at jps.net > >> To: voip at ckts.info > >> Subject: Re: [VoIP] Spotted On Ebay > >> > >> My thoughts are that the photos are so small that even though I am > >> somewhat familiar with British equipment and highly familiar with North > >> American equipment, IMO not enough can be determined about them to be > >> confident that they would be useful. > >> > >> Very specific details about these kinds of parts determines whether they > >> will fit a specific application. If you had seen these earlier and > >> gotten more info from the seller, that might have given more certainty. > >> > >> Are you in Oz, such that they would not need to be shipped > >> internationally? I should add that I don't know what the exchange rate > >> is so I can't judge the pricing. > >> > >> Steph > >> > >> Mad Mark wrote: > >> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: > >> > > >> > 130193124276 > >> > 130193124377 > >> > 130193124440 > >> > > >> > I'm just wondering if they could be used in conjunction with my > >> > Strowger 2000-type rotary final selector, to maybe construct some kind > >> > of frankenswitch. There's only about 4:30 left on the auctions, so I'm > >> > hurrying. > >> > > >> > Any thoughts, anyone? > >> > > >> > > >> _______________________________________________ > >> VoIP mailing list > >> VoIP at ckts.info > >> http://lists.ckts.info/mailman/listinfo/voip > >> Project Web Page: http://www.ckts.info/ > > > > _________________________________________________________________ > > Overpaid or Underpaid? Check our comprehensive Salary Centre > > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fcontent%2Emycareer%2Ecom%2Eau%2Fsalary%2Dcentre%3Fs%5Fcid%3D595810&_t=766724125&_r=Hotmail_Email_Tagline_MyCareer_Oct07&_m=EXT > > _______________________________________________ > > VoIP mailing list > > VoIP at ckts.info > > http://lists.ckts.info/mailman/listinfo/voip > > Project Web Page: http://www.ckts.info/ > > > > > > -- > > No virus found in this incoming message. > > Checked by AVG Free Edition. > > Version: 7.5.516 / Virus Database: 269.19.19/1257 - Release Date: > > 3/02/2008 5:49 p.m. > > > > > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ _________________________________________________________________ Your Future Starts Here. Dream it? Then be it! Find it at www.seek.com.au http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau%2F%3Ftracking%3Dsk%3Ahet%3Ask%3Anine%3A0%3Ahot%3Atext&_t=764565661&_r=OCT07_endtext_Future&_m=EXT From madmanmarkau at hotmail.com Mon Feb 4 01:53:35 2008 From: madmanmarkau at hotmail.com (Mad Mark) Date: Mon, 4 Feb 2008 07:53:35 +0000 Subject: [VoIP] Fundamentals of Antique Strowger In-Reply-To: <47A6B71E.4000701@jps.net> References: <47A2AA9A.5010502@telis.org> <47A2AFA4.1060909@jps.net> <47A2B211.40105@telis.org> <47A6B71E.4000701@jps.net> Message-ID: Oh how awesome. I'm nabbing a copy of that as we speak. > Date: Mon, 4 Feb 2008 01:56:30 -0500 > From: stfkerman at jps.net > To: voip at ckts.info > CC: jtburnham at q.com > Subject: Re: [VoIP] Fundamentals of Antique Strowger > > Mark (and others), > > Here are a couple of messages that didn't make it here and are very worthy of cross-posting. I think they are for the most part self-explanatory. > > At the time this book was published, Keith "plunger" lineswitches and rotary lineswitches (what are referred to as Subscriber Uniselectors in BPO parlance) were all that existed. The 2-motion > Linefinder was about to be introduced. From the viewpoint of North American practice this is a major area not covered since LFs were very widely used here, much more widely than in the UK it seems. > However these books are very worthwhile despite that for the breadth of coverage and the view they give of the early days. And you can't beat the price! > > IMO Jim deserves many thanks from the wannabe electro-mechanical switcher community for the effort he put into this. He is not on this list AFAIK but his address is in the CC. > > (More comments at the bottom) > > Jim Burnham wrote: > > I've scanned and posted for download the first half of Smith & > > Campbells' Automatic Telephony, 1921 edition. It's about 60mb and can > > be had from - > > > > www.aircraftmanuals.us/phone/automatic-telephony.pdf > > > > The second half will be posted by Sunday evening or so. There are no > > restrictions on this - it's available for all. Index it, OCR it, sell > > it, give it away, it matters not to me. It makes fun gifts for the > > whole family. > Jim Burnham wrote: > > I've scanned and posted for download the second half of Smith & > > Campbell's Automatic Telephony, 1921 edition. > > > > It's about 68mb and can be downloaded from - > > > > www.aircraftmanuals.us/phone/automatic-telephony-2.pdf > > > > > > The first half is still available at - > > > > www.aircraftmanuals.us/phone/automatic-telephony.pdf > > > > Dialup users - download at your own peril. The total size will be > > around 125MB > > > > > > Enjoy. > > > > Jim Burnham > > In reply, someone pointed out that Google also scanned the book and that > their entire volume was only about 11 MB instead of 2 x 68 MB. That's > because the scan quality is much much lower. A discussion about quality > ensued as a result of that comment. > > I downloaded both forms of it so I have it for purposes of future > extracting purposes. I own a copy of the book. > > Steph > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ _________________________________________________________________ It's simple! Sell your car for just $30 at CarPoint.com.au http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fsecure%2Dau%2Eimrworldwide%2Ecom%2Fcgi%2Dbin%2Fa%2Fci%5F450304%2Fet%5F2%2Fcg%5F801459%2Fpi%5F1004813%2Fai%5F859641&_t=762955845&_r=tig_OCT07&_m=EXT From chad at maine.edu Mon Feb 4 11:33:43 2008 From: chad at maine.edu (Chad Perkins) Date: Mon, 04 Feb 2008 12:33:43 -0500 Subject: [VoIP] OT: decpetive eBay auctions Message-ID: <47A70627.27936.601F7AE@localhost> I normally don't engage in this behavior, but knowing that a good number of you trade in Cisco IP phones, be aware seller bizphones- ca is selling sets billed as SIP that apparently are not. Obviously they can be upgraded, but the auction(s) make no (other) mention of of what firmware is actually installed leading (potential) buyers to assume the are SIP (as opposed to SIP capable but really something else, i.e. H.323 or SCCP). As always, buyer beware. From martin at Princeton.EDU Mon Feb 4 15:31:39 2008 From: martin at Princeton.EDU (Martin Harriss) Date: Mon, 04 Feb 2008 16:31:39 -0500 Subject: [VoIP] Spotted On Ebay In-Reply-To: References: Message-ID: <47A7843B.9000406@Princeton.EDU> Mad Mark wrote: > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: > > > 130193124276 > > 130193124377 > > 130193124440 The first appears to be a standard BPO type 1 uniselector. The third is a BPO "miniature' uniselector (type 4 if memory serves.) The second item is rather interesting. I *think* it's a Siemens digit/pulse counting switch, developed by them for their number 17 system (the one that used motor uniselectors.) Unfortunately, from the pictures it appears to be missing it's wipers, so it's no ore than a display piece. S17 was never used in public service in the UK as far as I am aware, but maybe it was in Oz... One of the big oil companies, I forget which, had a big S17 PBX installation in their London office. Martin From madmanmarkau at hotmail.com Wed Feb 6 21:01:11 2008 From: madmanmarkau at hotmail.com (Mad Mark) Date: Thu, 7 Feb 2008 03:01:11 +0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <47A7843B.9000406@Princeton.EDU> References: <47A7843B.9000406@Princeton.EDU> Message-ID: I won the items, and they should be arriving in a few days, if all goes well. Sounds like that S17 is the perfect novelty piece for a display. Now I understand why someone said it was rather unusual. Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps you can help me too. *** Begin message *** I?ve been reading up on EM switching gear from the Automatic Telephony book by Arthur Bessey Smith and Wilson Lee Campbell, and have a couple of questions about the line and cut-off relays when using a line finder. First, can you confirm my understanding of this. When the customer goes off-hook, the Line-Relay (LR) actuates, connecting the motor-magnet (MM) of the line-finder to the private wiper (PW) and off into the rest of the exchange. If the PW is grounded by the rest of the exchange, the current flows via the MM through the PW and to ground via the rest of the exchange, advancing the line-finder (because the MM is basically a chopper circuit). When the wipers rest on an idle trunk, the PW is no longer grounded, so the MM doesn?t have a ground connection for power so can?t actuate. However, the cut-off relay (COR) has enough current via the MM to actuate, cutting the customer loop through to the idle trunk, and connecting the PW to ground via the LR, busying the trunk circuit. Because the COR has now actuated, the LR is cut off and slowly releases, being a slow release relay. Here?s the part I don?t quite understand. After the LR has released, it disconnects the ground from the COR relay. What is now supplying the ground connection to keep the COR actuated? Is it something at the other end of the trunk? Or am I missing something? The following are assumptions based on the circuit diagram I have. When the called party disconnects, the ground is removed from the Trunk Release line and PW, thus removing ground from the COR, returning the relay to the normal state and connecting the customer line back onto the LR. The LR is getting power because the customers handset is still off-hook, so it actuates again, and causes the COR to actuate, reconnecting the line to the trunk, and cutting power to the LR. The LR releases AGAIN, causing the COR to release, etc? One huge chopper circuit is happening. Or, maybe the trunk circuit sees the momentary ground on the PW and applies its ground to the PW as if the customer had just picked up their handset again. I am most probably misunderstanding this greatly, as I don?t see this happening as being a good thing. And I am assuming the connector switch or some circuit further up the trunk handles all call disconnects? Also I?m assuming the line-finder rotates only in one direction and has two sets of wipers, one set coming into use at position 0 when the other set (positioned at 180 degrees) leaves position 24 (or whatever the maximum is) and rotates into dead air. Is this correct? Can you give any clarification on these points? > Date: Mon, 4 Feb 2008 16:31:39 -0500 > From: martin at Princeton.EDU > To: voip at ckts.info > Subject: Re: [VoIP] Spotted On Ebay > > Mad Mark wrote: > > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: > > > > > > 130193124276 > > > > 130193124377 > > > > 130193124440 > > The first appears to be a standard BPO type 1 uniselector. The third is > a BPO "miniature' uniselector (type 4 if memory serves.) > > The second item is rather interesting. I *think* it's a Siemens > digit/pulse counting switch, developed by them for their number 17 > system (the one that used motor uniselectors.) Unfortunately, from the > pictures it appears to be missing it's wipers, so it's no ore than a > display piece. > > S17 was never used in public service in the UK as far as I am aware, but > maybe it was in Oz... One of the big oil companies, I forget which, had > a big S17 PBX installation in their London office. > > Martin > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ _________________________________________________________________ What are you waiting for? Join Lavalife FREE http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT From ian at uax.org.uk Thu Feb 7 03:13:40 2008 From: ian at uax.org.uk (Ian Jolly) Date: Thu, 7 Feb 2008 09:13:40 -0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: References: <47A7843B.9000406@Princeton.EDU> Message-ID: <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> I've replied at length to Mark on this one to save clogging the list up with 'non-CNET' info. Also pointed him in the direction of the bible as used for UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & Procter which covers most UK manufactured systems. Ian Jolly ----- Original Message ----- From: "Mad Mark" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 3:01 AM Subject: Re: [VoIP] Spotted On Ebay > > I won the items, and they should be arriving in a few days, if all goes > well. Sounds like that S17 is the perfect novelty piece for a display. Now > I understand why someone said it was rather unusual. > > Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps > you can help me too. > > *** Begin message *** > > > I?ve been reading up on EM > switching gear from the Automatic Telephony book by Arthur Bessey Smith > and > Wilson Lee Campbell, and have a couple of questions about the line and > cut-off > relays when using a line finder. > > > > First, can you confirm my > understanding of this. When the customer goes off-hook, the Line-Relay > (LR) > actuates, connecting the motor-magnet (MM) of the line-finder to the > private > wiper (PW) and off into the rest of the exchange. If the PW is grounded by > the > rest of the exchange, the current flows via the MM through the PW and to > ground > via the rest of the exchange, advancing the line-finder (because the MM is > basically a chopper circuit). > > > > When the wipers rest on an idle > trunk, the PW is no longer grounded, so the MM doesn?t have a ground > connection > for power so can?t actuate. However, the cut-off relay (COR) has enough > current > via the MM to actuate, cutting the customer loop through to the idle > trunk, and > connecting the PW to ground via the LR, busying the trunk circuit. Because > the > COR has now actuated, the LR is cut off and slowly releases, being a slow > release relay. > > > > Here?s the part I don?t quite > understand. After the LR has released, it disconnects the ground from the > COR > relay. What is now supplying the ground connection to keep the COR > actuated? Is > it something at the other end of the trunk? Or am I missing something? > > > > The following are assumptions > based on the circuit diagram I have. When the called party disconnects, > the > ground is removed from the Trunk Release line and PW, thus removing ground > from > the COR, returning the relay to the normal state and connecting the > customer > line back onto the LR. The LR is getting power because the customers > handset is > still off-hook, so it actuates again, and causes the COR to actuate, > reconnecting the line to the trunk, and cutting power to the LR. The LR > releases AGAIN, causing the COR to release, etc? One huge chopper circuit > is > happening. Or, maybe the trunk circuit sees the momentary ground on the PW > and > applies its ground to the PW as if the customer had just picked up their > handset again. I am most probably misunderstanding this greatly, as I don?t > see > this happening as being a good thing. > > > > And I am assuming the connector > switch or some circuit further up the trunk handles all call disconnects? > > > > Also I?m assuming the line-finder > rotates only in one direction and has two sets of wipers, one set coming > into > use at position 0 when the other set (positioned at 180 degrees) leaves > position 24 (or whatever the maximum is) and rotates into dead air. Is > this correct? > > > > Can you give any clarification on > these points? > >> Date: Mon, 4 Feb 2008 16:31:39 -0500 >> From: martin at Princeton.EDU >> To: voip at ckts.info >> Subject: Re: [VoIP] Spotted On Ebay >> >> Mad Mark wrote: >> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >> > >> > >> > 130193124276 >> > >> > 130193124377 >> > >> > 130193124440 >> >> The first appears to be a standard BPO type 1 uniselector. The third is >> a BPO "miniature' uniselector (type 4 if memory serves.) >> >> The second item is rather interesting. I *think* it's a Siemens >> digit/pulse counting switch, developed by them for their number 17 >> system (the one that used motor uniselectors.) Unfortunately, from the >> pictures it appears to be missing it's wipers, so it's no ore than a >> display piece. >> >> S17 was never used in public service in the UK as far as I am aware, but >> maybe it was in Oz... One of the big oil companies, I forget which, had >> a big S17 PBX installation in their London office. >> >> Martin >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ > > _________________________________________________________________ > What are you waiting for? Join Lavalife FREE > http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > From ian at uax.org.uk Thu Feb 7 03:21:31 2008 From: ian at uax.org.uk (Ian Jolly) Date: Thu, 7 Feb 2008 09:21:31 -0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> References: <47A7843B.9000406@Princeton.EDU> <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> Message-ID: <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> Forgot to mention - there's a good book on Strowger systems at http://tinyurl.com/2wbfzt I've got my copy! It is of use to me as I have couple of final selectors (connectors) from the UK's first public auto exchange which the book describes in detail together with all its large pull out circuit diagrams. When I get time I hope to build a small demo switch incorporating the selectors/s. I think this book is about the same date as the one Mark is using ! Ian J ----- Original Message ----- From: "Ian Jolly" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 9:13 AM Subject: Re: [VoIP] Spotted On Ebay > I've replied at length to Mark on this one to save clogging the list up > with > 'non-CNET' info. Also pointed him in the direction of the bible as used > for > UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & > Procter which covers most UK manufactured systems. > > Ian Jolly > > > ----- Original Message ----- > From: "Mad Mark" > To: "Voice Over IP Tandem for Analog Switches" > Sent: Thursday, February 07, 2008 3:01 AM > Subject: Re: [VoIP] Spotted On Ebay > > >> >> I won the items, and they should be arriving in a few days, if all goes >> well. Sounds like that S17 is the perfect novelty piece for a display. >> Now >> I understand why someone said it was rather unusual. >> >> Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps >> you can help me too. >> >> *** Begin message *** >> >> >> I?ve been reading up on EM >> switching gear from the Automatic Telephony book by Arthur Bessey Smith >> and >> Wilson Lee Campbell, and have a couple of questions about the line and >> cut-off >> relays when using a line finder. >> >> >> >> First, can you confirm my >> understanding of this. When the customer goes off-hook, the Line-Relay >> (LR) >> actuates, connecting the motor-magnet (MM) of the line-finder to the >> private >> wiper (PW) and off into the rest of the exchange. If the PW is grounded >> by >> the >> rest of the exchange, the current flows via the MM through the PW and to >> ground >> via the rest of the exchange, advancing the line-finder (because the MM >> is >> basically a chopper circuit). >> >> >> >> When the wipers rest on an idle >> trunk, the PW is no longer grounded, so the MM doesn?t have a ground >> connection >> for power so can?t actuate. However, the cut-off relay (COR) has enough >> current >> via the MM to actuate, cutting the customer loop through to the idle >> trunk, and >> connecting the PW to ground via the LR, busying the trunk circuit. >> Because >> the >> COR has now actuated, the LR is cut off and slowly releases, being a slow >> release relay. >> >> >> >> Here?s the part I don?t quite >> understand. After the LR has released, it disconnects the ground from the >> COR >> relay. What is now supplying the ground connection to keep the COR >> actuated? Is >> it something at the other end of the trunk? Or am I missing something? >> >> >> >> The following are assumptions >> based on the circuit diagram I have. When the called party disconnects, >> the >> ground is removed from the Trunk Release line and PW, thus removing >> ground >> from >> the COR, returning the relay to the normal state and connecting the >> customer >> line back onto the LR. The LR is getting power because the customers >> handset is >> still off-hook, so it actuates again, and causes the COR to actuate, >> reconnecting the line to the trunk, and cutting power to the LR. The LR >> releases AGAIN, causing the COR to release, etc? One huge chopper circuit >> is >> happening. Or, maybe the trunk circuit sees the momentary ground on the >> PW >> and >> applies its ground to the PW as if the customer had just picked up their >> handset again. I am most probably misunderstanding this greatly, as I don?t >> see >> this happening as being a good thing. >> >> >> >> And I am assuming the connector >> switch or some circuit further up the trunk handles all call disconnects? >> >> >> >> Also I?m assuming the line-finder >> rotates only in one direction and has two sets of wipers, one set coming >> into >> use at position 0 when the other set (positioned at 180 degrees) leaves >> position 24 (or whatever the maximum is) and rotates into dead air. Is >> this correct? >> >> >> >> Can you give any clarification on >> these points? >> >>> Date: Mon, 4 Feb 2008 16:31:39 -0500 >>> From: martin at Princeton.EDU >>> To: voip at ckts.info >>> Subject: Re: [VoIP] Spotted On Ebay >>> >>> Mad Mark wrote: >>> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >>> > >>> > >>> > 130193124276 >>> > >>> > 130193124377 >>> > >>> > 130193124440 >>> >>> The first appears to be a standard BPO type 1 uniselector. The third is >>> a BPO "miniature' uniselector (type 4 if memory serves.) >>> >>> The second item is rather interesting. I *think* it's a Siemens >>> digit/pulse counting switch, developed by them for their number 17 >>> system (the one that used motor uniselectors.) Unfortunately, from the >>> pictures it appears to be missing it's wipers, so it's no ore than a >>> display piece. >>> >>> S17 was never used in public service in the UK as far as I am aware, but >>> maybe it was in Oz... One of the big oil companies, I forget which, had >>> a big S17 PBX installation in their London office. >>> >>> Martin >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >> >> _________________________________________________________________ >> What are you waiting for? Join Lavalife FREE >> http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > From spenadel at gmail.com Thu Feb 7 06:27:26 2008 From: spenadel at gmail.com (Lee Spenadel) Date: Thu, 7 Feb 2008 07:27:26 -0500 Subject: [VoIP] Spotted On EBay In-Reply-To: <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> References: <47A7843B.9000406@Princeton.EDU> <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> Message-ID: <00e601c86984$cce1f8a0$66a5e9e0$@com> Ian, The book costs $1500 US! Does a working Strowger exchange switch come with it? Lee -----Original Message----- From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of Ian Jolly Sent: Thursday, February 07, 2008 4:22 AM To: Ian Jolly; Voice Over IP Tandem for Analog Switches Subject: Re: [VoIP] Spotted On Ebay Forgot to mention - there's a good book on Strowger systems at http://tinyurl.com/2wbfzt I've got my copy! It is of use to me as I have couple of final selectors (connectors) from the UK's first public auto exchange which the book describes in detail together with all its large pull out circuit diagrams. When I get time I hope to build a small demo switch incorporating the selectors/s. I think this book is about the same date as the one Mark is using ! Ian J ----- Original Message ----- From: "Ian Jolly" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 9:13 AM Subject: Re: [VoIP] Spotted On Ebay > I've replied at length to Mark on this one to save clogging the list up > with > 'non-CNET' info. Also pointed him in the direction of the bible as used > for > UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & > Procter which covers most UK manufactured systems. > > Ian Jolly > > > ----- Original Message ----- > From: "Mad Mark" > To: "Voice Over IP Tandem for Analog Switches" > Sent: Thursday, February 07, 2008 3:01 AM > Subject: Re: [VoIP] Spotted On Ebay > > >> >> I won the items, and they should be arriving in a few days, if all goes >> well. Sounds like that S17 is the perfect novelty piece for a display. >> Now >> I understand why someone said it was rather unusual. >> >> Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps >> you can help me too. >> >> *** Begin message *** >> >> >> I've been reading up on EM >> switching gear from the Automatic Telephony book by Arthur Bessey Smith >> and >> Wilson Lee Campbell, and have a couple of questions about the line and >> cut-off >> relays when using a line finder. >> >> >> >> First, can you confirm my >> understanding of this. When the customer goes off-hook, the Line-Relay >> (LR) >> actuates, connecting the motor-magnet (MM) of the line-finder to the >> private >> wiper (PW) and off into the rest of the exchange. If the PW is grounded >> by >> the >> rest of the exchange, the current flows via the MM through the PW and to >> ground >> via the rest of the exchange, advancing the line-finder (because the MM >> is >> basically a chopper circuit). >> >> >> >> When the wipers rest on an idle >> trunk, the PW is no longer grounded, so the MM doesn't have a ground >> connection >> for power so can't actuate. However, the cut-off relay (COR) has enough >> current >> via the MM to actuate, cutting the customer loop through to the idle >> trunk, and >> connecting the PW to ground via the LR, busying the trunk circuit. >> Because >> the >> COR has now actuated, the LR is cut off and slowly releases, being a slow >> release relay. >> >> >> >> Here's the part I don't quite >> understand. After the LR has released, it disconnects the ground from the >> COR >> relay. What is now supplying the ground connection to keep the COR >> actuated? Is >> it something at the other end of the trunk? Or am I missing something? >> >> >> >> The following are assumptions >> based on the circuit diagram I have. When the called party disconnects, >> the >> ground is removed from the Trunk Release line and PW, thus removing >> ground >> from >> the COR, returning the relay to the normal state and connecting the >> customer >> line back onto the LR. The LR is getting power because the customers >> handset is >> still off-hook, so it actuates again, and causes the COR to actuate, >> reconnecting the line to the trunk, and cutting power to the LR. The LR >> releases AGAIN, causing the COR to release, etc. One huge chopper circuit >> is >> happening. Or, maybe the trunk circuit sees the momentary ground on the >> PW >> and >> applies its ground to the PW as if the customer had just picked up their >> handset again. I am most probably misunderstanding this greatly, as I don't >> see >> this happening as being a good thing. >> >> >> >> And I am assuming the connector >> switch or some circuit further up the trunk handles all call disconnects. >> >> >> >> Also I'm assuming the line-finder >> rotates only in one direction and has two sets of wipers, one set coming >> into >> use at position 0 when the other set (positioned at 180 degrees) leaves >> position 24 (or whatever the maximum is) and rotates into dead air. Is >> this correct? >> >> >> >> Can you give any clarification on >> these points? >> >>> Date: Mon, 4 Feb 2008 16:31:39 -0500 >>> From: martin at Princeton.EDU >>> To: voip at ckts.info >>> Subject: Re: [VoIP] Spotted On Ebay >>> >>> Mad Mark wrote: >>> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >>> > >>> > >>> > 130193124276 >>> > >>> > 130193124377 >>> > >>> > 130193124440 >>> >>> The first appears to be a standard BPO type 1 uniselector. The third is >>> a BPO "miniature' uniselector (type 4 if memory serves.) >>> >>> The second item is rather interesting. I *think* it's a Siemens >>> digit/pulse counting switch, developed by them for their number 17 >>> system (the one that used motor uniselectors.) Unfortunately, from the >>> pictures it appears to be missing it's wipers, so it's no ore than a >>> display piece. >>> >>> S17 was never used in public service in the UK as far as I am aware, but >>> maybe it was in Oz... One of the big oil companies, I forget which, had >>> a big S17 PBX installation in their London office. >>> >>> Martin >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >> >> _________________________________________________________________ >> What are you waiting for? Join Lavalife FREE >> http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2E au%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3D en%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > _______________________________________________ VoIP mailing list VoIP at ckts.info http://lists.ckts.info/mailman/listinfo/voip Project Web Page: http://www.ckts.info/ From hockd at dteenergy.com Thu Feb 7 06:38:35 2008 From: hockd at dteenergy.com (Dennis D Hock) Date: Thu, 7 Feb 2008 07:38:35 -0500 Subject: [VoIP] Spotted On EBay In-Reply-To: <00e601c86984$cce1f8a0$66a5e9e0$@com> References: <47A7843B.9000406@Princeton.EDU> <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC>, <00e601c86984$cce1f8a0$66a5e9e0$@com> Message-ID: I think it has a gold plated model of a Strowger switch withit. ;-)) Dennis H. -----voip-bounces at ckts.info wrote: ----- To: "'Ian Jolly'" , "'Voice Over IP Tandem for Analog Switches'" From: "Lee Spenadel" Sent by: voip-bounces at ckts.info Date: 02/07/2008 07:27AM Subject: Re: [VoIP] Spotted On EBay Ian, The book costs $1500 US! Does a working Strowger exchange switch come with it? Lee -----Original Message----- From: voip-bounces at ckts.info [mailto:voip-bounces at ckts.info] On Behalf Of Ian Jolly Sent: Thursday, February 07, 2008 4:22 AM To: Ian Jolly; Voice Over IP Tandem for Analog Switches Subject: Re: [VoIP] Spotted On Ebay Forgot to mention - there's a good book on Strowger systems at http://tinyurl.com/2wbfzt I've got my copy! It is of use to me as I have couple of final selectors (connectors) from the UK's first public auto exchange which the book describes in detail together with all its large pull out circuit diagrams. When I get time I hope to build a small demo switch incorporating the selectors/s. I think this book is about the same date as the one Mark is using ! Ian J ----- Original Message ----- From: "Ian Jolly" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 9:13 AM Subject: Re: [VoIP] Spotted On Ebay > I've replied at length to Mark on this one to save clogging the list up > with > 'non-CNET' info. Also pointed him in the direction of the bible as used > for > UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & > Procter which covers most UK manufactured systems. > > Ian Jolly > > > ----- Original Message ----- > From: "Mad Mark" > To: "Voice Over IP Tandem for Analog Switches" > Sent: Thursday, February 07, 2008 3:01 AM > Subject: Re: [VoIP] Spotted On Ebay > > >> >> I won the items, and they should be arriving in a few days, if all goes >> well. Sounds like that S17 is the perfect novelty piece for a display. >> Now >> I understand why someone said it was rather unusual. >> >> Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps >> you can help me too. >> >> *** Begin message *** >> >> >> I've been reading up on EM >> switching gear from the Automatic Telephony book by Arthur Bessey Smith >> and >> Wilson Lee Campbell, and have a couple of questions about the line and >> cut-off >> relays when using a line finder. >> >> >> >> First, can you confirm my >> understanding of this. When the customer goes off-hook, the Line-Relay >> (LR) >> actuates, connecting the motor-magnet (MM) of the line-finder to the >> private >> wiper (PW) and off into the rest of the exchange. If the PW is grounded >> by >> the >> rest of the exchange, the current flows via the MM through the PW and to >> ground >> via the rest of the exchange, advancing the line-finder (because the MM >> is >> basically a chopper circuit). >> >> >> >> When the wipers rest on an idle >> trunk, the PW is no longer grounded, so the MM doesn't have a ground >> connection >> for power so can't actuate. However, the cut-off relay (COR) has enough >> current >> via the MM to actuate, cutting the customer loop through to the idle >> trunk, and >> connecting the PW to ground via the LR, busying the trunk circuit. >> Because >> the >> COR has now actuated, the LR is cut off and slowly releases, being a slow >> release relay. >> >> >> >> Here's the part I don't quite >> understand. After the LR has released, it disconnects the ground from the >> COR >> relay. What is now supplying the ground connection to keep the COR >> actuated? Is >> it something at the other end of the trunk? Or am I missing something? >> >> >> >> The following are assumptions >> based on the circuit diagram I have. When the called party disconnects, >> the >> ground is removed from the Trunk Release line and PW, thus removing >> ground >> from >> the COR, returning the relay to the normal state and connecting the >> customer >> line back onto the LR. The LR is getting power because the customers >> handset is >> still off-hook, so it actuates again, and causes the COR to actuate, >> reconnecting the line to the trunk, and cutting power to the LR. The LR >> releases AGAIN, causing the COR to release, etc. One huge chopper circuit >> is >> happening. Or, maybe the trunk circuit sees the momentary ground on the >> PW >> and >> applies its ground to the PW as if the customer had just picked up their >> handset again. I am most probably misunderstanding this greatly, as I don't >> see >> this happening as being a good thing. >> >> >> >> And I am assuming the connector >> switch or some circuit further up the trunk handles all call disconnects. >> >> >> >> Also I'm assuming the line-finder >> rotates only in one direction and has two sets of wipers, one set coming >> into >> use at position 0 when the other set (positioned at 180 degrees) leaves >> position 24 (or whatever the maximum is) and rotates into dead air. Is >> this correct? >> >> >> >> Can you give any clarification on >> these points? >> >>> Date: Mon, 4 Feb 2008 16:31:39 -0500 >>> From: martin at Princeton.EDU >>> To: voip at ckts.info >>> Subject: Re: [VoIP] Spotted On Ebay >>> >>> Mad Mark wrote: >>> > Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >>> > >>> > >>> > 130193124276 >>> > >>> > 130193124377 >>> > >>> > 130193124440 >>> >>> The first appears to be a standard BPO type 1 uniselector. The third is >>> a BPO "miniature' uniselector (type 4 if memory serves.) >>> >>> The second item is rather interesting. I *think* it's a Siemens >>> digit/pulse counting switch, developed by them for their number 17 >>> system (the one that used motor uniselectors.) Unfortunately, from the >>> pictures it appears to be missing it's wipers, so it's no ore than a >>> display piece. >>> >>> S17 was never used in public service in the UK as far as I am aware, but >>> maybe it was in Oz... One of the big oil companies, I forget which, had >>> a big S17 PBX installation in their London office. >>> >>> Martin >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >> >> _________________________________________________________________ >> What are you waiting for? Join Lavalife FREE >> http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2E au%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3D en%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > _______________________________________________ VoIP mailing list VoIP at ckts.info http://lists.ckts.info/mailman/listinfo/voip Project Web Page: http://www.ckts.info/ _______________________________________________ VoIP mailing list VoIP at ckts.info http://lists.ckts.info/mailman/listinfo/voip Project Web Page: http://www.ckts.info/ From Lucky225 at 2600.com Thu Feb 7 06:39:49 2008 From: Lucky225 at 2600.com (Lucky 225) Date: Thu, 7 Feb 2008 06:39:49 -0600 Subject: [VoIP] magicjack Message-ID: Anyone hear about this service? It's wild! $20/YEAR! Unlimite LD, Caller ID Spoofing, and CPN Trapping From windmill at topletter.com Thu Feb 7 06:22:23 2008 From: windmill at topletter.com (windmill) Date: Thu, 07 Feb 2008 12:22:23 +0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> References: <47A7843B.9000406@Princeton.EDU> <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> Message-ID: <47AAF7FF.90906@topletter.com> No book is worth that amount of money to me! I thought ?30+ for a 1928 book about London Underground and ?40+ for an IRSE reference work on British Railway Signalling were close to my limits when i bought them on Ebay. Interestingly I saw someone asking a ridiculous starting price of ?50+ for volumes 1&2 of Atkinson's Telephony recently and they were late editions. Brian Ian Jolly wrote: > Forgot to mention - there's a good book on Strowger systems at > http://tinyurl.com/2wbfzt I've got my copy! It is of use to me as I > have couple of final selectors (connectors) from the UK's first public auto > exchange which the book describes in detail together with all its large pull > out circuit diagrams. When I get time I hope to build a small demo switch > incorporating the selectors/s. > > I think this book is about the same date as the one Mark is using ! > > Ian J > > ----- Original Message ----- > From: "Ian Jolly" > To: "Voice Over IP Tandem for Analog Switches" > Sent: Thursday, February 07, 2008 9:13 AM > Subject: Re: [VoIP] Spotted On Ebay > > > >> I've replied at length to Mark on this one to save clogging the list up >> with >> 'non-CNET' info. Also pointed him in the direction of the bible as used >> for >> UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & >> Procter which covers most UK manufactured systems. >> >> Ian Jolly >> >> >> ----- Original Message ----- >> From: "Mad Mark" >> To: "Voice Over IP Tandem for Analog Switches" >> Sent: Thursday, February 07, 2008 3:01 AM >> Subject: Re: [VoIP] Spotted On Ebay >> >> >> >>> I won the items, and they should be arriving in a few days, if all goes >>> well. Sounds like that S17 is the perfect novelty piece for a display. >>> Now >>> I understand why someone said it was rather unusual. >>> >>> Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps >>> you can help me too. >>> >>> *** Begin message *** >>> >>> >>> I?ve been reading up on EM >>> switching gear from the Automatic Telephony book by Arthur Bessey Smith >>> and >>> Wilson Lee Campbell, and have a couple of questions about the line and >>> cut-off >>> relays when using a line finder. >>> >>> >>> >>> First, can you confirm my >>> understanding of this. When the customer goes off-hook, the Line-Relay >>> (LR) >>> actuates, connecting the motor-magnet (MM) of the line-finder to the >>> private >>> wiper (PW) and off into the rest of the exchange. If the PW is grounded >>> by >>> the >>> rest of the exchange, the current flows via the MM through the PW and to >>> ground >>> via the rest of the exchange, advancing the line-finder (because the MM >>> is >>> basically a chopper circuit). >>> >>> >>> >>> When the wipers rest on an idle >>> trunk, the PW is no longer grounded, so the MM doesn?t have a ground >>> connection >>> for power so can?t actuate. However, the cut-off relay (COR) has enough >>> current >>> via the MM to actuate, cutting the customer loop through to the idle >>> trunk, and >>> connecting the PW to ground via the LR, busying the trunk circuit. >>> Because >>> the >>> COR has now actuated, the LR is cut off and slowly releases, being a slow >>> release relay. >>> >>> >>> >>> Here?s the part I don?t quite >>> understand. After the LR has released, it disconnects the ground from the >>> COR >>> relay. What is now supplying the ground connection to keep the COR >>> actuated? Is >>> it something at the other end of the trunk? Or am I missing something? >>> >>> >>> >>> The following are assumptions >>> based on the circuit diagram I have. When the called party disconnects, >>> the >>> ground is removed from the Trunk Release line and PW, thus removing >>> ground >>> from >>> the COR, returning the relay to the normal state and connecting the >>> customer >>> line back onto the LR. The LR is getting power because the customers >>> handset is >>> still off-hook, so it actuates again, and causes the COR to actuate, >>> reconnecting the line to the trunk, and cutting power to the LR. The LR >>> releases AGAIN, causing the COR to release, etc? One huge chopper circuit >>> is >>> happening. Or, maybe the trunk circuit sees the momentary ground on the >>> PW >>> and >>> applies its ground to the PW as if the customer had just picked up their >>> handset again. I am most probably misunderstanding this greatly, as I don?t >>> see >>> this happening as being a good thing. >>> >>> >>> >>> And I am assuming the connector >>> switch or some circuit further up the trunk handles all call disconnects? >>> >>> >>> >>> Also I?m assuming the line-finder >>> rotates only in one direction and has two sets of wipers, one set coming >>> into >>> use at position 0 when the other set (positioned at 180 degrees) leaves >>> position 24 (or whatever the maximum is) and rotates into dead air. Is >>> this correct? >>> >>> >>> >>> Can you give any clarification on >>> these points? >>> >>> >>>> Date: Mon, 4 Feb 2008 16:31:39 -0500 >>>> From: martin at Princeton.EDU >>>> To: voip at ckts.info >>>> Subject: Re: [VoIP] Spotted On Ebay >>>> >>>> Mad Mark wrote: >>>> >>>>> Someone on the CNET-UK-I mailing list spotted these items on E-Bay: >>>>> >>>>> >>>>> 130193124276 >>>>> >>>>> 130193124377 >>>>> >>>>> 130193124440 >>>>> >>>> The first appears to be a standard BPO type 1 uniselector. The third is >>>> a BPO "miniature' uniselector (type 4 if memory serves.) >>>> >>>> The second item is rather interesting. I *think* it's a Siemens >>>> digit/pulse counting switch, developed by them for their number 17 >>>> system (the one that used motor uniselectors.) Unfortunately, from the >>>> pictures it appears to be missing it's wipers, so it's no ore than a >>>> display piece. >>>> >>>> S17 was never used in public service in the UK as far as I am aware, but >>>> maybe it was in Oz... One of the big oil companies, I forget which, had >>>> a big S17 PBX installation in their London office. >>>> >>>> Martin >>>> _______________________________________________ >>>> VoIP mailing list >>>> VoIP at ckts.info >>>> http://lists.ckts.info/mailman/listinfo/voip >>>> Project Web Page: http://www.ckts.info/ >>>> >>> _________________________________________________________________ >>> What are you waiting for? Join Lavalife FREE >>> http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Flavalife9%2Eninemsn%2Ecom%2Eau%2Fclickthru%2Fclickthru%2Eact%3Fid%3Dninemsn%26context%3Dan99%26locale%3Den%5FAU%26a%3D30288&_t=764581033&_r=email_taglines_Join_free_OCT07&_m=EXT >>> _______________________________________________ >>> VoIP mailing list >>> VoIP at ckts.info >>> http://lists.ckts.info/mailman/listinfo/voip >>> Project Web Page: http://www.ckts.info/ >>> >>> >> _______________________________________________ >> VoIP mailing list >> VoIP at ckts.info >> http://lists.ckts.info/mailman/listinfo/voip >> Project Web Page: http://www.ckts.info/ >> >> > > _______________________________________________ > VoIP mailing list > VoIP at ckts.info > http://lists.ckts.info/mailman/listinfo/voip > Project Web Page: http://www.ckts.info/ > From ratguy at insightbb.com Thu Feb 7 09:12:14 2008 From: ratguy at insightbb.com (Jayson Smith) Date: Thu, 7 Feb 2008 10:12:14 -0500 Subject: [VoIP] Fw: [C/O X-Bar] 5x10 Xbar For Sale Message-ID: <000d01c8699b$d2503ba0$0c00a8c0@BOE> Sorry for those of you who've already seen this, but thought some CNET people might be interested. ----- Original Message ----- From: "lrds" To: "Co at yahoo" ; "ATCA" ; "TCI" Sent: Thursday, February 07, 2008 6:18 AM Subject: [C/O X-Bar] 5x10 Xbar For Sale Hi Group, I have a friend who has a 5x10 cross bar for sale. He thinks its Western Electric. Its sealed & wrapped up. He is located in Farmingdale, NY. He is a good guy to deal with. If interested, his name is Arthur and email is: vzeoml7w at verizon.net I do not know anything else about the switch. Tell him Bruce from Huntington sent you. Thanks, Bruce Potter From ian at uax.org.uk Thu Feb 7 10:38:05 2008 From: ian at uax.org.uk (Ian Jolly) Date: Thu, 7 Feb 2008 16:38:05 -0000 Subject: [VoIP] Spotted On Ebay In-Reply-To: <47AAF7FF.90906@topletter.com> References: <47A7843B.9000406@Princeton.EDU> <8103675A8D6C4C6BACB962FEE3661CCC@IanPC> <0731A5DA35EF468BAA91D2BBA15D7B85@IanPC> <47AAF7FF.90906@topletter.com> Message-ID: <5EC866034E164243A25FA9AAAC5AC13A@IanPC> Two volumes of Atkinson's #Telephony' for ?50.00 (US$97.00 for out Colonial friends :-) ) - you obviously didn't buy them new as I did ! It took two years to pay for them at ?x. xs xd per week from my wages! They probably cost that much 50 years ago when I bought mine ! A bargain at modern day prices. Mind you I bought a "Vol 2" for some-one the other day for ?6.76 - and the postage was ?7.00 :-( Ian J ----- Original Message ----- From: windmill To: Ian Jolly ; Voice Over IP Tandem for Analog Switches Sent: Thursday, February 07, 2008 12:22 PM Subject: Re: [VoIP] Spotted On Ebay No book is worth that amount of money to me! I thought ?30+ for a 1928 book about London Underground and ?40+ for an IRSE reference work on British Railway Signalling were close to my limits when i bought them on Ebay. Interestingly I saw someone asking a ridiculous starting price of ?50+ for volumes 1&2 of Atkinson's Telephony recently and they were late editions. Brian Ian Jolly wrote: Forgot to mention - there's a good book on Strowger systems at http://tinyurl.com/2wbfzt I've got my copy! It is of use to me as I have couple of final selectors (connectors) from the UK's first public auto exchange which the book describes in detail together with all its large pull out circuit diagrams. When I get time I hope to build a small demo switch incorporating the selectors/s. I think this book is about the same date as the one Mark is using ! Ian J ----- Original Message ----- From: "Ian Jolly" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 9:13 AM Subject: Re: [VoIP] Spotted On Ebay I've replied at length to Mark on this one to save clogging the list up with 'non-CNET' info. Also pointed him in the direction of the bible as used for UK systems - Atkinson's 'Telephony' and its predecessor - by Herbert & Procter which covers most UK manufactured systems. Ian Jolly ----- Original Message ----- From: "Mad Mark" To: "Voice Over IP Tandem for Analog Switches" Sent: Thursday, February 07, 2008 3:01 AM Subject: Re: [VoIP] Spotted On Ebay I won the items, and they should be arriving in a few days, if all goes well. Sounds like that S17 is the perfect novelty piece for a display. Now I understand why someone said it was rather unusual. Anyway, I'm going to copy/paste an E-Mail I sent to Ian and John. Perhaps you can help me too. *** Begin message *** I?ve been reading up on EM switching gear from the Automatic Telephony book by Arthur Bessey Smith and Wilson Lee Campbell, and have a couple of questions about the line and cut-off relays when using a line finder. First, can you confirm my understanding of this. When the customer goes off-hook, the Line-Relay (LR) actuates, connecting the motor-magnet (MM) of the line-finder to the private wiper (PW) and off into the rest of the exchange. If the PW is grounded by the rest of the exchange, the current flows via the MM through the PW and to ground via the rest of the exchange, advancing the line-finder (because the MM is basically a chopper circuit). When the wipers rest on an idle trunk, the PW is no longer grounded, so the MM doesn?t have a ground connection for power so can?t actuate. However, the cut-off relay (COR) has enough current via the MM to actuate, cutting the customer loop through to the idle trunk, and connecting the PW to ground via the LR, busying the trunk circuit. Because the COR has now actuated, the LR is cut off and slowly releases, being a slow release relay. Here?s the part I don?t quite understand. After the LR has released, it disconnects the ground from the COR relay. What is now supplying the ground connection to keep the COR actuated? Is it something at the other end of the trunk? Or am I missing something? The following are assumptions based on the circuit diagram I have. When the called party disconnects, the ground is removed from the Trunk Release line and PW, thus removing ground from the COR, returning the relay to the normal state and connecting the customer line back onto the LR. The LR is getting power because the customers handset is still off-hook, so it actuates again, and causes the COR to actuate, reconnecting the line to the trunk, and cutting power to the LR. The LR releases AGAIN, causing the COR to release, etc? One huge chopper circuit is happening. Or, maybe the trunk circuit sees the momentary ground on the PW and applies its ground to the PW as if the customer had just picked up their handset again. I am most probably misunderstanding this greatly, as I don?t see this happening as being a good thing. And I am assuming the connector switch or some circuit further up the trunk handles all call disconnects? Also I?m assuming the line-finder rotates only in one direction and has two sets of wipers, one set coming into use at position 0 when the other set (positioned at 180 degrees) leaves position 24 (or whatever the maximum is) and rotates into dead air. Is this correct? Can you give any clarification on these points? Date: Mon, 4 Feb 2008 16:31:39 -0500 From: martin at Princeton.EDU To: voip at ckts.info Subject: Re: [VoIP] Spotted On Ebay Mad Mark wrote: Someone on the CNET-UK-I mailing list spotted these items on E-Bay: 130193124276 130193124377 130193124440 The first appears to be a standard BPO type 1 uniselector. The third is a BPO "miniature' uniselector (type 4 if memory serves.) The second item is rather interesting. I *think* it's a Siemens digit/pulse counting switch, developed by them for their number 17 system (the one t