3Com VCX V7111 VoIP SIP Gateways User Manual 149A PPENDIX B: RTP/RTCP PAYLOAD TYPESRTP Payload Types are defined in RFC 1889 and RFC 1890. 3Com has added new payloadtypes to enable advanced use of other coder types. These types are reportedly not used byother applications.See the VCX V7165 Digital Media Server Release Notes for the supported coders.Packet Types Defined in RFC 1890Table 25 Packet Types Defined in RFC 1890Payload Type Description Basic Packet Rate [ms]0 G.711 μ-Law 202 G.726-32 204 G.723 (6.3/5.3 Kbps) 308 G.711 A-Law 2018 G.729 20200 RTCP Sender Report Randomly, approximately every 5 seconds (whenpackets are sent by channel)201 RTCP Receiver Report Randomly, approximately every 5 seconds (whenchannel is only receiving)202 RTCP SDES packet203 RTCP BYE packet204 RTCP APP packet
