> > Greetings all, > > I've been doing some testing with a new client's voicemail system from my > asterisk box at home. I'm using a 7960 (alaw/ulaw) then an IAX2 link > between > my server and the client's server. > > I've configured IAX settings at both ends as follows: jitterbuffer > enabled, > trunking enabled, ILBC/GSM allowed in that order. When listening to the > voice prompts from VoicemailMain at the client's asterisk I hear about one > word in three, very similar to a GSM mobile on the border of its coverage. > Disabling trunking appears to make no difference. Disabling the jitter > buffer appears to solve the problem, but with a connection that's often > used > for other things, this is undesirable as a long-term solution. > > When I make the same call from a SIP device (GXP2000), the issue > disappears > entirely. But the same problem does not occur from the 7960 to a PSTN > gateway (also via IAX2 with exactly the same settings). > > To summarize: > 7960 -> remote (ILBC + jitterbuffer) = quality problem > SIP -> remote (ILBC + jitterbuffer) = no problem > 7960 -> remote (ILBC no jitterbuffer) = no problem > > I'm not sure what's to blame here - the 7960 or my IAX settings, or where > to > begin looking for solutions. > > Any thoughts? > > Regards, > > Chris > -- > C.M. Bagnall, Director, Minotaur I.T. Limited > This email is made from 100% recycled electrons > >
Jitterbuffer is to blame. _______________________________________________ --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
