[Asterisk-Users] Asterisk 1.2.4 IAX2 New Jitterbuffer Tuning

[Adam Robins]

After many days of playing with the new jitterbuffer and trunking options for IAX2, I have finally received almost acceptable quality.  I am receiving 5-8 complaints a day of calls "breaking up" from both the customer and agent sides.  What I have discovered is that in most of these cases, the new jitterbuffer performed a resync during the call.  Currently, I have the resyncthreshold, and all other jb parameters at their default levels  The traffic is running over a fairly high latency WAN connection between Canada and Atlanta (IAX2, ILBC).  Idle ping times run about 85ms.
 
Below are the resync messages for this past Friday.  Knowing that I have a slow connection, should I set the resync at a much higher level?  I appreciate any assistance you may provide.
 
Thanks,
Adam
 
Feb 17 09:07:41 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -34, this delay 1651, threshold 1488, new offset -1651
Feb 17 09:07:42 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -120, this delay -1684, threshold 1000, new offset 33
Feb 17 10:21:04 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 176, this delay 1835, threshold 1126, new offset -1835
Feb 17 10:21:04 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 32, this delay 1673, threshold 1062, new offset -1673
Feb 17 10:21:04 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -150, this delay -1663, threshold 1300, new offset -172
Feb 17 10:21:04 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -150, this delay -1635, threshold 1300, new offset -38
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -22, this delay 2335, threshold 1054, new offset -2373
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 11, this delay 2363, threshold 1082, new offset -2535
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -71, this delay 2249, threshold 1054, new offset -2249
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -180, this delay -2359, threshold 1360, new offset -14
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -150, this delay -2354, threshold 1300, new offset -181
Feb 17 10:21:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -120, this delay -2297, threshold 1240, new offset 48
Feb 17 10:34:28 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 109, this delay 1556, threshold 1136, new offset -1556
Feb 17 10:34:28 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -30, this delay -1439, threshold 1000, new offset -117
Feb 17 10:34:32 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -7, this delay 1608, threshold 1048, new offset -1725
Feb 17 10:34:32 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -29, this delay -1616, threshold 1058, new offset -109
Feb 17 10:45:08 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 21, this delay 1751, threshold 1620, new offset -1751
Feb 17 10:45:08 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -7, this delay 1724, threshold 1686, new offset -1724
Feb 17 10:45:08 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -60, this delay -1716, threshold 1000, new offset -8
Feb 17 10:45:08 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -119, this delay -1757, threshold 1000, new offset 6
Feb 17 11:28:45 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 75, this delay 1421, threshold 1326, new offset -1421
Feb 17 11:28:45 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 274, this delay 1595, threshold 1282, new offset -1595
Feb 17 11:29:03 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -1311, this delay 820, threshold 1824, new offset -2415
Feb 17 11:29:03 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -1349, this delay 761, threshold 1752, new offset -2182
Feb 17 11:29:03 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -299, this delay -2127, threshold 1598, new offset -288
Feb 17 11:29:03 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -270, this delay -2106, threshold 1540, new offset -76
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 98, this delay 1878, threshold 1206, new offset -1878
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 44, this delay 1799, threshold 1150, new offset -1799
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 28, this delay 1781, threshold 1146, new offset -1781
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -150, this delay -1753, threshold 1000, new offset -46
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -150, this delay -1765, threshold 1000, new offset -16
Feb 17 11:46:15 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -149, this delay -1747, threshold 1298, new offset -131
Feb 17 11:54:36 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -44, this delay 1136, threshold 1064, new offset -1152
Feb 17 11:54:36 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 1, this delay 1155, threshold 1080, new offset -1155
Feb 17 11:54:36 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 405, this delay 1547, threshold 1080, new offset -1547
Feb 17 11:54:36 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -26, this delay 1115, threshold 1054, new offset -1115
Feb 17 11:54:36 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay -60, this delay -1133, threshold 1000, new offset -414
Feb 17 11:54:48 WARNING[1078] chan_iax2.c: Resyncing the jb. last_delay 3, this delay 1144, threshold 1048, new offset -1558


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