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I discussed this with sangoma support in the past. Sangoma says, it
is NOT recommended to disable echo cancellation there.<br>
<br>
Am 04.02.2011 10:53, schrieb Gopalakrishnan A.N:
<blockquote
cite="mid:AANLkTinY5Lh0MzEw2PW=Rv=WC23+-xoU=+asQeTHhq3P@mail.gmail.com"
type="cite">It seems to be you are using Sangoma T1/E1 card with
echo cancellation. If I am not wrong there is a parameter for echo
cancel in the card configuration, try disabling that because
already you have enabled echo cancel in dahdi file.
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<div>Hope it help.:)</div>
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<div class="gmail_quote">On Fri, Feb 4, 2011 at 11:11 AM, DHAVAL
INDRODIYA <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:dhaval.it01034@gmail.com">dhaval.it01034@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">Hi All,<br>
<br>
This posting regarding PRI voice optimization, on dahdi
2.1.0.4.<br>
<br>
we have more than 4 machine running on 4 port PRI card with
echo cancellation hardware based.<br>
<br>
i have enabled echo cancel from chan_dahdi.conf using
echocancel=yes, now more than 70% of call get good voice <br>
but some of calls having issue for callquality and other
voice related issues. now my question is that is there<br>
any voice related parameter that we need to set for INDIA
specific region and is ther any voice hardware tester for
PRI<br>
that we can use and tell us our PRI [telco] provider that
problem is not from our side. let give some idea . below are
my configuration as well.<br>
<br>
<br>
<br>
# Autogenerated by /usr/local/sbin/genzaptelconf -- do not
hand edit<br>
# Zaptel Configuration File<br>
#<br>
# This file is parsed by the Zaptel Configurator, ztcfg<br>
#<br>
<br>
# It must be in the module loading order<br>
<br>
<br>
# Global data<br>
<br>
loadzone = in<br>
defaultzone = in<br>
<br>
<br>
span = 1,0,0,ccs,hdb3<br>
bchan = 1-15<br>
dchan = 16<br>
bchan = 17-31<br>
<br>
span = 2,0,0,ccs,hdb3<br>
bchan = 32-46<br>
dchan = 47<br>
bchan = 48-62<br>
<br>
span = 3,0,0,ccs,hdb3<br>
bchan = 63-77<br>
dchan = 78<br>
bchan = 79-93<br>
<br>
span = 4,0,0,ccs,hdb3<br>
bchan = 94-108<br>
dchan = 109<br>
bchan = 110-124<br>
<br>
<br>
<br>
[channels]<br>
language=en<br>
context=from-pstn<br>
switchtype=euroisdn<br>
pridialplan=local<br>
prilocaldialplan=local<br>
signalling=pri_cpe<br>
usecallerid=yes<br>
hidecallerid=no<br>
callwaiting=yes<br>
usecallingpres=yes<br>
callwaitingcallerid=yes<br>
threewaycalling=yes<br>
transfer=yes<br>
cancallforward=yes<br>
callreturn=yes<br>
relaxdtmf=yes<br>
echocancel=yes<br>
echocancelwhenbridged=yes<br>
echotraining=yes<br>
resetinterval=never<br>
rxgain=0.0<br>
txgain=0.0<br>
callgroup=1<br>
pickupgroup=1<br>
immediate=no<br>
group = 0<br>
channel => 1-15<br>
channel => 17-31<br>
channel => 32-46<br>
channel => 48-62<br>
channel => 63-77<br>
channel => 79-93<br>
channel => 94-108<br>
channel => 110-124<br>
</blockquote>
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