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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110204/ee1dd7bb/attachment.htm>
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 > > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-- Thank you with regards, Gopalakrishnan A.N. VoIP call - sip:saigop at gtalk2voip.com <sip%3Asaigop at gtalk2voip.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110204/cbefe27f/attachment-0001.htm>
Hi Gopal, i am using *Digium, Inc. Wildcard TE410P quad-span T1/E1/J1 card 3.3V* card with tata PRI lines. regards dhaval On Fri, Feb 4, 2011 at 3:23 PM, Gopalakrishnan A.N <saigop at gmail.com> wrote:> 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 >> >> >> >> -- >> _____________________________________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> New to Asterisk? Join us for a live introductory webinar every Thurs: >> http://www.asterisk.org/hello >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> > > > > -- > Thank you with regards, > Gopalakrishnan A.N. > VoIP call - sip:saigop at gtalk2voip.com <sip%3Asaigop at gtalk2voip.com> > > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20110204/cc02e9b4/attachment.htm>
On Fri, Feb 4, 2011 at 12:41 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. >If 70% of calls get good quality then chances are its not your problem for the 30%. Things to look at (for the 30%): 1. Any specific internal phones that this problem sticks with? 2. Other end a cell phone? or maybe VoIP? 3. Any bluetooth involved? Bluetooth IMHO is a disaster of a technology when it comes to realtime voice as in phone conversations. Worse than G.729. It should never be used for a professional business conversation, wired headsets for cell phones still beat any wireless solutions. For desk phones proprietary RF is far better than BT. 4. What type of call quality? A. Garbled as in under water (jitter???) or B. Echo as in hearing yourself back after some ms? or C. Static Select case case A your end or far end? case B your end or far end? case C probably far end. Hope this helps