[cisco-voip] recommendations for handing off sip trunks as pri for legacy

[Zoltan.Kelemen at Emerson.com]

Now here's a question:
CUBE, as far as I know, is IP to IP gateway. So why would one need CUBE licenses for SIP to PRI?

Your IPVoice feature set should do the trick just fine (not as if CUBE would be anywhere enforced, but I digress. I actually don't think this setup needs CUBE licensing).

However, keep in mind that you will also need DSPs (PVDM modules) for the T1, a PVDM2-32 per T1.

You would probably need to act as network side on the PRI for your PBX.

Here's some sample config, although your switch-type may vary, as well as you may need to use different patterns, number translations etc.:

card type t1 0 0
!
network-clock-participate wic 0 
network-clock-select 1 T1 0/0/0
!
isdn switch-type primary-qsig
!
controller T1 0/0/0
 cablelength long 0db
 pri-group timeslots 1-24
!
interface Serial0/0/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-qsig
 isdn incoming-voice voice
 no cdp enable
!
voice-port 0/0/0:23
!
dial-peer voice 2 voip
 description SIPTrunk
 destination-pattern 9T
 session protocol sipv2
 session target ipv4:10.20.30.40
 incoming called-number .
 voice-class sip options-keepalive up-interval 20 down-interval 10
 dtmf-relay rtp-nte
 no vad
 supplementary-service pass-through
!
dial-peer voice 3 pots
 description PBX-PRI
 destination-pattern +T
 incoming called-number .
 direct-inward-dial
 port 0/0/0:23
!

Cheers,

Zoltan Kelemen
ETS & Information Security 
Implementation Engineering
w: +40 374 132356 | m: +40 757 039093

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mike 
Sent: Sunday, March 31, 2013 11:35 PM
To: 'chris'; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] recommendations for handing off sip trunks as pri for legacy

Chris,

I've done this several times. You will need CUBE licenses and a multi-flex
T1 card (MFT), but you easily convert the SIP handoff to PRI.

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of chris
Sent: Sunday, March 31, 2013 9:28 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] recommendations for handing off sip trunks as pri for legacy

We have recently acquired a new location which has a legacy analog pbx and a carrier who was providing service as a PRI.

The carrier has now stated they will no longer be supporting PRI and are recommending a switch to SIP trunks, which would be fine if they provided adtran or similar to handle the conversion.

The carrier says they do not get involved in this situation and its up to the customer, so we are left to fend for ourselves :)

This loction already has a 2851 with ipvoice, and I was thinking I should be able to do everything I need with that?

Googling seems to turn up lots of configs which simply terminate local calls to a physically connected PRI, when in actuality I want to do the inverse and use the cisco to hand off a traditional PRI to the analog system.

Anyone gone down this path before? Have any config examples of what I described that I can reference?

Also what type of linecard would I need to handoff the PRI? Does it need to be a MFT T1 card or plain t1 dsu/csu?

thanks in advance
chris
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