[Asterisk-Users] T1 Technology and VoIP Gateway Primer

[Adam Robins]

Why would you use gateways and PRI's when several of the major carriers
(AT&T, Global Crossing, etc.) also have products that can interface
directly with SIP for the same per minute cost?

We have a multisite Asterisk call center application and are routing all
calls over private VPN to one central Asterisk location from where we
have multiple point-to-point T1's going straight into Global Crossing.
They are accepting the traffic as SIP g.729a and are handling the
gateway themselves.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Callum
McGillivray
Sent: Friday, April 29, 2005 1:19 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] T1 Technology and VoIP Gateway Primer

Hi Matt & everyone else,

We have also been steering toward using a gateway for our large
installation.

Ours differs from your significantly in as much as our setup will
involve 8 apartment buildings located throughout the CBD.  Each
apartment building will have as many as 600 extensions (rooms) with an
Asterisk Server in the comms room in the basement.

Incoming and Outgoing calls are going to be trunked from the Asterisk
box along a fiber link back to our core exchange, where the calls will
be handed off to a gateway machine (Cisco?) which will have an
impressively large number of PRI's plugged into the back of it.

My (very vague) examination so far tells me that I can use something
along the lines of a Cisco AS5400 (a couple of which I have kicking
around here in the office).

Has anyone had experience in handing off / receiving calls from a Cisco
AS5400 with Asterisk ? 

How is it done ?

Matt, is this similar to the idea that you have for your project ?  What
Cisco hardware have you looked at so far ?  How many E1/T1 lines are you
going to have terminating on your setup ?

Cheers,

Callum

Matt Roth wrote:

> Michael,
>
>> Have you decided which PSTN-VoIP gateway you'll use?
>
>
>
> Not yet, but our preference is a Cisco gateway.  Lucent, Quintum, and 
> AudioCodes also make TDM-VoIP gateways.
>
> Prior to purchasing any hardware, our entire layout will be posted to 
> this list in detail for review.
>
> Matthew Roth
> http://voip-info.org/tiki-index.php?page=Running%20Asterisk%20on%20Deb
> ian _______________________________________________
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