[Asterisk-Users] T1 echo canceller

Matthew Crocker matthew at crocker.com
Tue Sep 5 09:59:18 MST 2006

On Sep 5, 2006, at 11:56 AM, Michael Araba wrote:

> I have had a bad experience with Asterisk and a Carrier's channel  
> bank.
> The carrier brought in a PRI (data/voice integrated), the data and  
> voice
> channels are split from the channel bank. I connected Asterisk to the
> channel bank via T1 cross cable with a Digium T205.

Sorry to nitpick but a PRI is NOT a data/voice integrated T1.  A PRI  
is a T1 with one channel (normally the last) used for call signalling.
If the T1 from the carrier is split into two pieces (data & voice) at  
your office and the hand off to Asterisk is a T1 then it is not a  
channel bank.  A channel bank splits a T1 into 1-24 DS0 voice  
channels.  If your interface with Asterisk is a T1 you should  
probably look at getting one of the newer Digium cards with the add- 
on hardware echo canceller.


Matthew S. Crocker
Vice President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710

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