Colin Anderson
2005-Oct-27 16:12 UTC
[Asterisk-Users] Opinions on IAX JitterBuffer in old-school 1.0.0 ?
I have a small issue with some remote users connecting to my primary Asterisk server using 1.0 Every few seconds, there is a subtle "tick" and a very small amount of jitter. The tick is not consistent i.e. it could be in 2 seconds, could be 5, could be 10. This does not affect core functionality, and the call is quite usable but my endusers want it eliminated. My primary is also running 1.0. I am using the AstShape script on both ends and tos is set to 0x18 on both ends. If I connect through IAX to my primary with a 1.0.9 (a@h 1.5) there is no tick. GSM codec end-to-end, no transcoding. SNOM SIP phones on the remote, latest firmware. CPU on both ends is basically nil. No IRQ conflict. The tick only exhibits itself through my firewall but note if I use 1.0.9 though the firewall there is no tick. If I bring the remote IAX box inside the LAN and plug it in, no problem. Default jitter buffer settings on both ends as follows: jitterbuffer=yes maxjitterbuffer=500 maxexcessbuffer=80 minexcessbuffer=10 jittershrinkrate=1 Roundabout average-type values for "IAX2 SHOW CHANNELS" is 20ms lag, 10-20ms jitter, 60-80ms jitter buffer My theory is somehow the jitter buffer is contributing to this. Before I start twiddling knobs, I'd like opinions on whether the jitterbuffer could be contributing to this, and whether fooling around with the jitterbuffer values would have any effect. For various reasons, I am staying with 1.0 for the moment.
Shane Burrell
2005-Oct-27 20:17 UTC
[Asterisk-Users] Opinions on IAX JitterBuffer in old-school 1.0.0?
I've had similar problems with IAX2 and ticks. Jit buffer on and off don't seem to change things much. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Colin Anderson Sent: Thursday, October 27, 2005 7:13 PM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: [Asterisk-Users] Opinions on IAX JitterBuffer in old-school 1.0.0? I have a small issue with some remote users connecting to my primary Asterisk server using 1.0 Every few seconds, there is a subtle "tick" and a very small amount of jitter. The tick is not consistent i.e. it could be in 2 seconds, could be 5, could be 10. This does not affect core functionality, and the call is quite usable but my endusers want it eliminated. My primary is also running 1.0. I am using the AstShape script on both ends and tos is set to 0x18 on both ends. If I connect through IAX to my primary with a 1.0.9 (a@h 1.5) there is no tick. GSM codec end-to-end, no transcoding. SNOM SIP phones on the remote, latest firmware. CPU on both ends is basically nil. No IRQ conflict. The tick only exhibits itself through my firewall but note if I use 1.0.9 though the firewall there is no tick. If I bring the remote IAX box inside the LAN and plug it in, no problem. Default jitter buffer settings on both ends as follows: jitterbuffer=yes maxjitterbuffer=500 maxexcessbuffer=80 minexcessbuffer=10 jittershrinkrate=1 Roundabout average-type values for "IAX2 SHOW CHANNELS" is 20ms lag, 10-20ms jitter, 60-80ms jitter buffer My theory is somehow the jitter buffer is contributing to this. Before I start twiddling knobs, I'd like opinions on whether the jitterbuffer could be contributing to this, and whether fooling around with the jitterbuffer values would have any effect. For various reasons, I am staying with 1.0 for the moment. _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- 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