Hi I have even used H323 over satelite, and beside the lagg, no trouble. My only issue is the jitter buffer on IAX2 seems to be broken. On a very jittery connection, I can hardly make a decent call on IAX2.
Good luck! regards Clive On Tue, 30 Mar 2004 10:15:52 -0800 John Todd <[EMAIL PROTECTED]> wrote: > > Today has been the day for satellite questions, > apparently, so I'll proxy one out to the rest of the > community... I asked this tangentially a month or two > ago, but I'll put it in a more blunt way: > > If you have IAX2 trunking mode experience over satellite, > please let us know your experiences with that > protocol/transport combination. > > I've got several people asking about IAX2 and trunk mode > over satellite. I have not experimented with IAX2 over > satellite (though I have used IAX1 over satellite) and > I'm wondering if anyone has direct experiences with > IAX2's jitter buffer control over such long-latency > connections. > > I've had SIP working very well over satellite (despite > what some people have found to the contrary on this list) > and other than the lag there have been no issues that > have come up on a reasonably-managed satellite segment. > However, the IP overhead really starts to cost > significant amounts of pennies when you add it up on > multiple SIP RTP sessions over the same link. Plus, > packet contention and buffering may (_may_) be an issue > when pushing multiple simultaneous streams out the same > transponder. > > It would seem to me that IAX2 in trunk mode would be > optimal for people on very expensive satellite bandwidth, > as a G.729 9.6kbps channel starts to actually look like > 9.6kbps instead of 24kbps. However, I have had mixed > success with IAX2 in certain circumstances. Before I > start to ask for favors and get satellite time for > testing, I'd like to see if anyone else has performed > this experiment. If you'd wish to remain anonymous, > please mail me directly and I'll appropriately trim > identity information and re-distribute, or re-write as > appropriate. > > Other hints I have heard/used on VoIP over satellite: > - use small transmit cell (packet) sizes on your > satellite gear > - turn off error correction (why use it for VoIP?) > - turn off compression (G.729 is already compressed; > you ARE using > G.729, right?) > - ensure minimal latency on the terrestrial portions > of the call > - tell your users to suck it up and deal with the > half-second lag > > JT > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users __________________________________________________________________________ http://www.webmail.co.za/dialup Webmail ISP - Cool Connection, Cool Price _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
