convert analog DID to a PRI using Cisco router(s)?

[bthom73]

Hi all, the more I research the available hardware, the more confused I get... I'm definitely not a Cisco guru by any means.

First of all, my goal is to convert an analog DID circuit coming from the phone company to a digital PRI while at the same time preserving the "dialed number". The end result would be a PRI with 1 active B-channel, 22 inactive B-channels, and a D-channel containing the signaling including the dialed number. My ISDN phone equipment would then take it from there.

Second, I'm trying to do this as inexpensively as possible...

The boxes I'm currently looking at using are a 2600 series router and/or a MC3810 concentrator. The only reason the MC3810 is attractive is because they're available used for around $100 including a voice-capable PRI port and alternately it looks to be a bit more expensive to add voice PRI capabilities (high density DSP? NM-HDV? AIM-VOICE-30?) to a 2600 though the 2600 might still be required though for the DID portion. A 2600 router with a low-density voice carrier card (NM-2V) and DID card (VIC-2DID) is affordable but I'm not sure if that's all I would need for if what I'm trying to do is even possible...

Any suggestions would be greatly appreciated.

Thanks,
Brian

 

[jneiberger]

Brian,

Come to think of it, the IP Telephony forum on Cisco's site would be an even better place to ask this question.

http://forum.cisco.com/eforum/servlet/NetProf?page=main

Go there and select the IP Telephony forum. You should get fairly quick answers there.

 

[pndscm]

One end of the PRI must be the controlling end. What will be on the other end besides the Cisco router? I'm not sure a Cisco router can be the 'controlling' end of a PRI. I believe CallManager can do so but not a router.

 

[bthom73]

Are you speaking of PRIs in general or something Cisco specific?

The other end would be an Adtran Atlas 550. The Atlas can be configured to supply the clock/timing and can act as the C.O. end of the circuit if that helps.

 

[bthom73]

Regarding forum.cisco.com, I posted something similar there around the same time I posted it here, but I probably didn't word it very well and never got any responsese. I just reposted it again with more details. In any case, thanks for the suggestion. We'll see what happens...

Worst case I'll just order the parts, play with it until it either works or I lose my mind trying to make it work, and then post the end results.

-Brian