[Asterisk-Users] echotraining on T1 circuits

[Richard Lyman]

sounds like you switched providers.  you never know, unless you 
ask, where/who is really providing the line.

example:  we ordered a qwest line, it got installed.  found out 
later that the line was actually a MCI line because qwest had 
nothing available locally, and long-hauled it, placing echo cans 
inline.  (in our case the echo cans worsened the quality and made 
diagnostics impossible.

just food for thought.

mattf wrote:
> Hello,
> 
> We just had some new T1s turned up today to replace others that our contract
> has run out on and we are now getting more echo on the new T1 lines than we
> had on the old ones.
> 
> The T1 type is 24-channel, D4/AMI SF Robbed-bit(the same as the T1s they
> replaced)
> 
> The problem is that we are getting echo on about 10% of the calls in and out
> placed on these new T1s compared to less than 1% with echos on the old T1s.
> 
> I was wondering if anyone with T1s or E1s is using echotraining=yes. All the
> info on echotraining I've found seems to involve POTS lines not T1s.
> 
> Also, how much of a pause is made when using echotraining?
> 
> Here are my current zapata.conf settings for the T1s:
> [channels]
> group=1
> language=en
> signalling=em_w
> usecallerid=yes
> callerid=asreceived
> context=default
> echocancel=yes
> echocancelwhenbridged=yes
> rxgain=1.0
> txgain=1.0
> channel => 1-24
> 
> Thanks,
> 
> MATT---
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