I have 2 Asterisk servers connected with IAX. It's working fine I can call an extension from one phone in an office to another phone in the other office. The only problem I have is lagging. What codec should I use? I have Cisco phones 7960 on both end. Currently in the IAX trunk I configured it to disallow all and use GSM only. In my sip config of each phone I use disallow all and allow ulaw and alaw only. I see that the Cisco phone support G.729a, G.711u and G.711a codecs. I know that Digium is selling G.729 codec on there website. Should I get that to fix my problem? The less bandwitdh the codec takes over the Internet the better chance I have that it will work fine I presume. The maximum upload speed I can reach is 64k/sec so 512kbits. But that's if there's nothing else using the internet. I see that G.729 use 8kbps per call which seems quite small. The sound quality is good enough for SIP to SIP phones over the Net? Thanks Martin
I've called using G729 SIP phones over my LAN, and I think it sounds quite good. YMMV. On Fri, 04 Mar 2005 15:58:23 -0500, Martin Roy <mroy@mac.com> wrote:> I have 2 Asterisk servers connected with IAX. It's working fine I can > call an extension from one phone in an office to another phone in the > other office. The only problem I have is lagging. What codec should I > use? I have Cisco phones 7960 on both end. Currently in the IAX trunk I > configured it to disallow all and use GSM only. In my sip config of each > phone I use disallow all and allow ulaw and alaw only. > > I see that the Cisco phone support G.729a, G.711u and G.711a codecs. > > I know that Digium is selling G.729 codec on there website. Should I get > that to fix my problem? > > The less bandwitdh the codec takes over the Internet the better chance I > have that it will work fine I presume. > > The maximum upload speed I can reach is 64k/sec so 512kbits. But that's > if there's nothing else using the internet. I see that G.729 use 8kbps > per call which seems quite small. The sound quality is good enough for > SIP to SIP phones over the Net? > > Thanks > > Martin > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
Currently I have one server running Fedora Core 3 AMD 64bits (on a 3mbits DSL with 640kbits upload) and the second server is running on Mac OS X (on a 512kbits SDSL) I'll change it soon for a PC with Fedora Core 3 but I know the G.729 isn't available for Mac OS X. Is there another codec that do the job well for now? I'll change the server in less then a month so I'll try all the supported codec if I have to until then... Thanks Martin |From: Dana Olson <rickaster@gmail.com> |Subject: Re: [Asterisk-Users] IAX Codec | |I've called using G729 SIP phones over my LAN, and I think it sounds |quite good. YMMV.