Cf rfc 4170 for an rtp multiplexing solution akin to IAX2's trunks. Also cf rfc 5225 for the latest in robust header compression for rtp. Either way, I suspect that this should be done under asterisk, rather than in it. -JimC -- James Cloos <cloos at jhcloos.com> OpenPGP: 1024D/ED7DAEA6