[asterisk-users] PRI voice optimization

[DHAVAL INDRODIYA]

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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