are you using Frame Relay? how big are the packets? I don't think you would be using ATM over a satellite VSAT modem. Also don't be fooled, satellite modems don't speak IP. There is normally an IP edge device that makes you believe it is IP. The 500 ms delay is the speed of light. You need to add the time for the protocols used by the satellite links. On top of that, you have the delays of IAX itself when it assembles the packets. All in all, you might be experiencing delays closer to 800 ms or more if VSAT modem is poorly configured. The other question to ask is if you are fully duplex. In the satellite world you do need two independ up/down links. IP over satellite is crazy. By nature satellites are broadcasting. Voice over satellite is already a challenge. I have done IAX over satellite but using small frame relay packets (256) and stopping any error retransmissions on the satellite modems. The result can be acceptable if you train your users to the 1/2 second delay and the fact that two people cannot talk at the same time (a challenge for us in South America). Regards, Uriel
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tilghman Lesher Sent: Saturday, October 11, 2003 7:03 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] SIP / IAX over satellite On Saturday, Oct 11, 2003, at 17:04 America/Chicago, Paul Mahler wrote: > Which satellite system? > > I think you need some specialized support, even special hardware. > Check > out > > http://www.groundcontrol.com/igvoip_001.htm > > You may need to replace TCP/IP > > http://www.mentat.com/skyx/skyx-gateway.html I don't know why he'd need to replace TCP/IP when both SIP as well as IAX use UDP/IP. There may be substantial latency, however. -Tilghman _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
