Help please. I have two systems on the net. one in indiana and one in georgia. connected with IAX. local SIP phones in each office (10 each) are cisco and running sip. TDM04B card in each location has 4 local lines. Incoming calls to each location sound fine always. The problem is dialing between offices the call quality is BAD. Both offices are connected to the net with T1 lines. all data. All phones are setup ulaw 64bit. The IAX connection between the boxes is ulaw 64 bit. I tried skype between the two offices and talked for 15 minutes and had no issue. The machine CPU usage is running 92-97% idle most of the time. Running asterisk 1.2.9.1 and zaptel 1.2.6. There are switches in the mix that have voice traffic having priority. How do I determine what is the issue here? Why is the call quality bad and where is it that I can tweek. Jerry
Brandon Galbraith
2006-Jul-31 14:15 UTC
[asterisk-users] IAX over two T1 connections bad quality
What's your bandwidth utilization on each T1 like? -brandon On 7/31/06, Jerry Geis <geisj@pagestation.com> wrote:> > Help please. I have two systems on the net. > one in indiana and one in georgia. > connected with IAX. local SIP phones in each office (10 each) are cisco > and running sip. > TDM04B card in each location has 4 local lines. > Incoming calls to each location sound fine always. > The problem is dialing between offices the call quality is BAD. > > Both offices are connected to the net with T1 lines. all data. > > All phones are setup ulaw 64bit. The IAX connection between the boxes is > ulaw 64 bit. > > I tried skype between the two offices and talked for 15 minutes and had > no issue. > > The machine CPU usage is running 92-97% idle most of the time. > > Running asterisk 1.2.9.1 and zaptel 1.2.6. > > There are switches in the mix that have voice traffic having priority. > > How do I determine what is the issue here? Why is the call quality bad > and where is > it that I can tweek. > > Jerry > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-- Brandon Galbraith Email: brandon.galbraith@gmail.com AIM: brandong00 Voice: 630.400.6992 "A true pirate starts drinking before the sun hits the yard-arm. Yarrrr. --thelost" -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060731/dba62a3e/attachment.htm
Bart Fisher
2006-Jul-31 14:16 UTC
[asterisk-users] IAX over two T1 connections bad quality
Replace IAX with SIP - It solved my problems with several providers including FWD and Teliax Bart Jerry Geis wrote:> Help please. I have two systems on the net. > one in indiana and one in georgia. > connected with IAX. local SIP phones in each office (10 each) are > cisco and running sip. > TDM04B card in each location has 4 local lines. > Incoming calls to each location sound fine always. > The problem is dialing between offices the call quality is BAD. > > Both offices are connected to the net with T1 lines. all data. > > All phones are setup ulaw 64bit. The IAX connection between the boxes > is ulaw 64 bit. > > I tried skype between the two offices and talked for 15 minutes and > had no issue. > > The machine CPU usage is running 92-97% idle most of the time. > > Running asterisk 1.2.9.1 and zaptel 1.2.6. > > There are switches in the mix that have voice traffic having priority. > > How do I determine what is the issue here? Why is the call quality bad > and where is > it that I can tweek. > > Jerry > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > __________ NOD32 1.1647 (20060706) Information __________ > > This message was checked by NOD32 antivirus system. > http://www.eset.com > > >
On 31 Jul 2006, at 22:11, Jerry Geis wrote:> Help please. I have two systems on the net. > one in indiana and one in georgia. > connected with IAX. local SIP phones in each office (10 each) are > cisco and running sip. > TDM04B card in each location has 4 local lines. > Incoming calls to each location sound fine always. > The problem is dialing between offices the call quality is BAD. > > Both offices are connected to the net with T1 lines. all data. > > All phones are setup ulaw 64bit. The IAX connection between the > boxes is ulaw 64 bit. > > I tried skype between the two offices and talked for 15 minutes and > had no issue. > > The machine CPU usage is running 92-97% idle most of the time. > > Running asterisk 1.2.9.1 and zaptel 1.2.6. > > There are switches in the mix that have voice traffic having priority. > > How do I determine what is the issue here? Why is the call quality > bad and where is > it that I can tweek.How have you configured your switches/routers to give voice priority? Do those rules cover IAX (UDP port 4569)? To see what asterisk thinks the problem is you can look at iax2 show netstats (from memory - I'm off net as I write this) It tells you how many dropped/late/jittered packets it has seen at each end. You probably want to enable the new jitterbuffer (at both ends) if you have not yet. Tim Panton www.mexuar.com