RTP payloads are a 7 bit number 0-128 divided in 2. 0-96 are reserved by the iana 97-128 are considered dynamic. When matching codecs between 0 and 96: 1) The payload MUST be matched by the _number_. When matching codecs between 97 and 128: (dynamic range) 1) The payload MUST be matched by the _name_. 2) Even when your leg and the other leg have different numbers for the same name, you MUST use their number to SEND and your own to RECV you CANNOT send your number someone who as advertised the same codec on another number. Please advise me on what we did wrong otherwise please remove me from your list of things that do it wrong. FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ AIM: anthm MSN:anthony_minessale@hotmail.com <MSN%3Aanthony_minessale@hotmail.com> GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com<PAYPAL%3Aanthony.minessale@gmail.com> IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org <sip%3A888@conference.freeswitch.org> iax:guest@conference.freeswitch.org/888 googletalk:conf+888@conference.freeswitch.org<googletalk%3Aconf%2B888@conference.freeswitch.org> pstn:213-799-1400