On Thu, 8 Apr 2010, Tim Nelson wrote:
> ----- "Jeff LaCoursiere" <j...@jeff.net> wrote: >> What is the consensus on using the 1.4 jitterbuffer? Do most people >> enable it? >> >> We have a "PSTN" server that has our RBS T1 trunks in a central >> location, >> then have clients that connect via SIP to us for access to those >> trunks. >> Most of them are just fine, but lately we have a handful that are >> having >> latency and jitter issues. I am hesitant to just turn on the jitter >> buffer in zapata.conf on the PSTN server for fear of impacting the >> clients >> that are "just fine". >> >> Should I be? > > I'm using the 1.4 jitterbuffer extensively as many of my customers have > poor connectivity (lossy wireless, satellite, etc). It functions well, > albeit keep in mind you'll likely need to do some fine tuning to get it > just right. > I guess that is part of my question - it would seem to me that "tuning" is basically sizing the buffer, correct? And that the tuning would be different from client to client, as their latency/jitter needs will be different. How did you handle that aspect? Did you just keep playing until you found something that was a best fit for all clients? I kind of understand that the dejitter must happen on the way "out" as the data gets placed onto a zap channel, and that the other direction should be dejittered at the customer's phone or adapter. In our case this is mainly Polycom IP 501s. I suppose some amount of tuning there will help what our client hears. But the phones are on a 100mb LAN. So would it be worthwhile to force a jitterbuffer on chan_sip on the asterisk server sitting at the client's location? Sorry for trhe vague questions. I think this would be a great topic for someone's BLOG - I haven't found too much in the way of advice via Google this morning. j -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users