[Asterisk-Users] Questions about PRI lines for modem banks and Asterisk

[Steven Critchfield]

On Sat, 2004-09-11 at 15:40, Clif Jones wrote:
> I have a friend with a PRI coming into a modem bank that is receiving 
> 56K modem calls and some ISDN data calls.  He wants to dump his analog 
> office phone lines and use some of the capacity on the PRI. I have been 
> digging through the mail archives and Wiki site on this subject but the 
> information I found doesn't give me a high enough confidence to go buy a 
> few T1 cards and try it out.  There is talk of using Asterisk as the 
> termination of the PRI from the PSTN and then forward calls for the 
> modem bank via another T1 span and a cross-over cable.  Others talk of 
> splitting the calls off with specialized equipment before it reaches the 
> Asterisk box.  Does anyone actually have the same (or similar) scenario 
> and if so what was your solution?  If you are using Asterisk to do the 
> switching, I would be interested in seeing your relevant config files.  
> My primary concerns are:
> - The load on the Asterisk box if it is acting as a router for the 
> incoming ISDN calls.
> - Effect of 56K modem dialup connections or ISDN data calls passing 
> through an Asterisk box.

Asterisk can handle your ISDN calls itself. So you really only need to
worry about passing the 56k calls through to the modem bank. Should
work, but I don't know if you can keep high 56k speed. 
-- 
Steven Critchfield <critch at basesys.com>