[VoIP] Seize zap channel without dialing

[Mad Mark]

Hey Don. I've been lurking for a while but had to post when I saw this.

I remember we discussed this a while back over E-Mail. You had tried stacking by dialing out of your system and dialing back in, trying to stack the call. You said it caused the system not release the trunks further down the line when the call hung up, and the system needed restarting to rectify the problem. Are you still having this problem, or was it sorted?

Now, if you're able to stack on a ProjectMF system, from what I've been able to discern flashing the hook-switch won't work, correct? I've been wrong on many an occasion before, and am just starting to learn the quirks of ProjectMF.

I think I've got this right. Tell me if I'm wrong. As long as the 2600 supervision "flash" you send is not longer than x milliseconds set in the config files, ProjectMF shouldn't disconnect the call. HOWEVER, even on short flashes, will you still get the "bip-bip-bip-BIP-BIP-BIP-BIP" effect (the 2600 flash traveling from exchange to exchange) on a ProjectMF system? I'm thinking you won't without more "cosmetic" coding.

Work on the exchange emulator is progressing much slower than I anticipated, mainly due to lack of time (and motivation) to work on it. I have, however, almost completed a wire-carrier trunk DSP.

For those that don't know, I'm slowly writing an actual phone network emulator to run on your local machine, able to simulate many different exchange types/configurations and trunk types, all with the old sounds (panel-pulses, SxS noise, XBT sounds, carrier noise...).

The only part I have completed so far is audio I/O and one trunk type, as well as miscellaneous other items. The trunk has programmable dynamics, having adjustable frequency response, looping wave file for carrier noise, and new as of last night, the "singing wires" effect (which I'll complete and test tonight.)

Sorry about the long message, but I tend to rant...


>From: dfroula at sbcglobal.net
>To: voip at ckts.info
>Date: Thu, 27 Sep 2007 08:25:56 -0700
>Subject: [VoIP] Seize zap channel without dialing
>I wonder if anyone knows how to do accomplish the
>following.
> 
>I want to be able to seize one of my SF/MF Zaptel
>trunks without dialing any digits.
> 
>I normally route a call through my T1-Over-Ethernet
>trunks with a simple dial command like:
> 
>exten => 2600,1,Dial(ZAP/g1/999)
>exten => 2600,2,HangUp
> 
>This dials extensions "999" through the SF/MF trunks,
>and allows the blue box user to seize the ringing 999
>extension with 2600.
> 
>I want to be able to simply seize the line without
>dialing anything, allowing the user to "stack" calls
>without having to blow 2600 and release the entire
>stack. Just seizing the trunk on connecting would
>allow the blue box user to simply outpulse the MF
>digits within the trunk timeout window (5 seconds or
>so), similar to the Phonetrips "classic tandem
>stacking" recording.
> 
>I tried omitting the extension:
> 
>exten => 2600,1,Dial(ZAP/g1/)
>exten => 2600,2,HangUp
> 
>This doesn't work, since KP-ST with no digits still
>gets sent, routing the call do the default extension
>in my incoming trunk context.
> 
>I hope this all makes sense.
> 
>Any ideas?
> 
>Don
 
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