[VoIP] Cisco 3810's

[john jones]

IMO, the 3810's do DP (and MF) very well.  This product was a multi-thousand dollar product intended for early voice/data integration for branch office applications; not a home product.  The ATA186/188 are horrible products but the 3810 seems to work very well.

I just wish I could get SIP to T1 working!

I do need to do some testing with a 3810 NAT'd behind some dynamically changing IP end-point.  It is possible to configure the gateway with a DNS name as the following commands illustrate (but I didn't test this and not 100% sure the port number appendage actuall works)

BatPhone(config-sip-ua)#sip-server dns:asteriskgateway.cnetsystem.com
BatPhone(config-sip-ua)#sip-server dns:asteriskgateway.cnetsystem.com:5060
BatPhone(config-sip-ua)# sip-server ipv4:192.168.0.20:5060


The last line is what I actually use but with non-static public IP's on the Asterisk side, it doesn't help much.


Does anyone have a often changing public IP address on there CNET Asterisk system that I could test a remote 3810 with.  My doesn't change very much so the testing would appear to work better than I'd expect in the real world.

John



----- Original Message ----
From: Shane Young <voiptandem at shaneyoung.com>
To: voip at ckts.info
Sent: Monday, September 24, 2007 11:44:42 AM
Subject: Re: [VoIP] Cisco 3810's

The docs say the can do DP as well as DTMF.  I'm curious to see how  
well that works as some of Cisco's other stuff doesn't do DP very well.

I think this is available in many different configurations, but yes,  
it seems that you could use it as a simple voice gateway in front of a  
channel bank, or just use the analog ports on it.

You might need to configure it "statically" in your Asterisk system.   
I don't know that the code for these supports registering like an ATA  
does.  That is one of the things I want to find out when I get them.   
This is easy to do when you are on the same LAN, but if you want to  
put it behind something that does NAT *and* may change it's WAN-Side  
IP address, it could be a little more difficult.

In an ideal world, these could be packaged up for non-IP savvy  
switchers to tandem off of somone elses system.  Just send out the  
3810 pre-configured and ready to go!



Quoting Donald Froula <dfroula at sbcglobal.net>:

> Sorry for the basic question, but I'm curious what
> these are used for.
>
> Can they be used simply as an ATA with FXO and FXS
> ports that can support dial pulsing? Can they be used
> to interface a T1/E1 channel bank to SIP? Do they have
> any other unique capabilities?
>
> How difficult is the SIP firmware to come by? Are they
> difficult to configure? They look like a fun unit to
> experiment with.
>
> Best,
>
> Don
>
> --- John Novack <jnovack at stromberg-carlson.org> wrote:
>
>> Best configuration is:
>> 3810-V3
>> 64 Ram
>> 16 Flash
>> AVM daughterboard
>> Your choice of modules
>> FXS and FXO are easier to find than the E&M
>> E&M needs some protection. Don't try and drive
>> relays and such directly
>> Ask John Jones about that.
>> There is one seller who has a bunch, make offer, and
>> he has generally
>> accepted in the 70-75 dollar range plus shipping.
>>
>> The 3810 and 3810-V usually don't have, and can't
>> accept the amount of
>> ram needed for the SIP image.
>>
>> John Jones is the real guru on these, but his job is
>> making him almost
>> inaccessible these days.
>> Enjoy
>>
>> JN
>>
>>
>>
>> Shane Young wrote:
>> > I'm going to be purchasing a couple of 3810's for
>> some experiments I
>> > want to do.
>> >
>> > I thought I'd check and see if there were any
>> extras here before I hit eBay.
>> >
>> >
>> > --Shane
>> > +1-821-7311 CNET
>> >
>> >
>>
> ----------------------------------------------------------------
>> >
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>> >
>> >
>>
>> --
>> Dog is my co-pilot
>>
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>

--Shane
+1-821-7311 CNET

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