[asterisk-users] PRI voice optimization

[Gopalakrishnan A.N]

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.

Hope it help.:)

On Fri, Feb 4, 2011 at 11:11 AM, DHAVAL INDRODIYA
<dhaval.it01034 at gmail.com>wrote:

> Hi All,
>
> This posting regarding PRI voice optimization, on dahdi 2.1.0.4.
>
> we have more than 4 machine running on 4 port PRI card with echo
> cancellation hardware based.
>
> i have enabled echo cancel from chan_dahdi.conf using echocancel=yes, now
> more than 70% of call get good voice
> but some of calls having issue for callquality and other voice related
> issues. now my question is that is there
> any voice related parameter that we need to set for INDIA specific region
> and is ther any voice hardware tester for PRI
> 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.
>
>
>
> # Autogenerated by /usr/local/sbin/genzaptelconf -- do not hand edit
> # Zaptel Configuration File
> #
> # This file is parsed by the Zaptel Configurator, ztcfg
> #
>
> # It must be in the module loading order
>
>
> # Global data
>
> loadzone        = in
> defaultzone     = in
>
>
> span = 1,0,0,ccs,hdb3
> bchan = 1-15
> dchan = 16
> bchan = 17-31
>
> span = 2,0,0,ccs,hdb3
> bchan = 32-46
> dchan = 47
> bchan = 48-62
>
> span = 3,0,0,ccs,hdb3
> bchan = 63-77
> dchan = 78
> bchan = 79-93
>
> span = 4,0,0,ccs,hdb3
> bchan = 94-108
> dchan = 109
> bchan = 110-124
>
>
>
> [channels]
>    language=en
>    context=from-pstn
>    switchtype=euroisdn
>    pridialplan=local
>    prilocaldialplan=local
>    signalling=pri_cpe
>    usecallerid=yes
>    hidecallerid=no
>    callwaiting=yes
>    usecallingpres=yes
>    callwaitingcallerid=yes
>    threewaycalling=yes
>    transfer=yes
>    cancallforward=yes
>    callreturn=yes
>    relaxdtmf=yes
>    echocancel=yes
>    echocancelwhenbridged=yes
>    echotraining=yes
>    resetinterval=never
>    rxgain=0.0
>    txgain=0.0
>    callgroup=1
>    pickupgroup=1
>    immediate=no
>    group = 0
>    channel => 1-15
>    channel => 17-31
>    channel => 32-46
>    channel => 48-62
>    channel => 63-77
>    channel => 79-93
>    channel => 94-108
>    channel => 110-124
>
>
>
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-- 
Thank you  with regards,
Gopalakrishnan A.N.
VoIP call - sip:saigop at gtalk2voip.com <sip%3Asaigop at gtalk2voip.com>
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