[cisco-voip] SIP to Legacy PBX

[Rupert Finnigan]

Hi,

Thanks for everyone's input so far. I think Jim's suggestion is most along
what I'm trying to achieve. I believe that XO take a similar approach to
this for our offices in the US, certainly they've got a 2821 that provides a
T1 PRI to a BCM400.

Thankfully, our four digit DN's map to the last four digits on the DDIs, so
this shouldn't be a major drama.

Obviously, I'll need to get a E1 Interface module for the interconnect the
BCM - and I'm currently looking at the HWIC-1CE1T1-PRI. Will this work
correctly? Also, am I likely to need any more DSP to handle this extra
processing?

Sorry for all these "newbie" questions - I really appreciate the help.

Thanks,

Rupert



On 8 July 2010 00:08, Jim McBurnett <jim at tgasolutions.com> wrote:

>  This is doable..
>
> Configure the router as a Cisco CUBE—search Cisco’s site on that..
>
>
> http://www.cisco.com/en/US/docs/ios/voice/cube/configuration/guide/vb_book/vb_book.html
>
>
>
> Basically ---
>
> SIP Dial-peers to the SIP PROVIDER..
>
>
>
> h.323 Dial peers to the PRI port..
>
>
>
> Read the Cisco Gateways Gatekeepers book for the h.323 config and you will
> also need the info from there on the translation patterns.
>
>
>
>
>
> If in the states—I use this rule…
>
> Pulls the first part of the extension of and sends the last 3 digits that
> you can match on to the h.323 peers..
>
>
>
>
>
> voice translation-rule 2
>
>  rule 1 /\+\(15555555\)\(...\)/ /\2/
>
>
>
>
>
> Now if your DID’s have NOTHING in common with the extensions, then you’re
> in for some fun
>
>
>
> IE 15555552323  goes to ext 879
>
>
>
>
>
> Later,
>
> Jim
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Rupert Finnigan
> *Sent:* Wednesday, July 07, 2010 5:26 PM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] SIP to Legacy PBX
>
>
>
> Hi All,
>
>
>
> First time poster here, so hello - and thanks in advance for any insight
> and advice you can offer now and in the future.
>
>
>
> I've been working with Cisco equipment for a while now, but have never
> touched on the VoIP field - however I now have a specific interest which I
> haven't been able to gather an answer to dispite my best Google-ing efforts.
>
>
>
> We've currently got a Nortel BCM 400 system, contected to PSTN via a ISDN30
> with 20 channels. I'm looking to consolodate all our conectivity to a 10MB
> Fibre Leased Line from BT, and route our calls over this connection using
> SIP either directly to BT, or to an alternative provider, such as Gradwell.
> However.... our BCM maintenance company won't support SIP directly on the
> BCM. Apparently, although the BCM will do SIP Nortel won't support it and so
> it'll leave the Maintenance guys exposed should problems arise. Changing the
> PBX isn't an option.
>
>
>
> Therefore, I'm looking into the possibilty of using one of our Cisco 2821
> routers to act as a SIP gateway. It'll provide the BCM with a ISDN 30 PRI,
> in much the same way as it gets now to remove the Nortel support problems.
> The other side will be SIP down the 10Mb line to our call provider. And
> hopefully, some magic will happen in the middle on the 2821 to make this all
> work "seemlessly"....
>
>
>
> Couple of questions really - 1) is it possible, & 2) if it is, can anyone
> point me in the direction of the recommended reading so I can enlighten
> myself futher?
>
>
>
> I really appreciate any help.
>
>
>
> Thanks,
>
>
>
> Rupes
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20100708/4c7aeb5d/attachment.html>