Nortel Networks TP-1610 SIP user manual Payload Types Defined in RFC, Defined Payload Types

Mediant 2000 SIP User’s Manual C. RTP/RTCP Payload Types and Port Allocation

Appendix C RTP/RTCP Payload Types and Port Allocation

RTP Payload Types are defined in RFC 1889 and RFC 1890. We have added new payload types to enable advanced use of other coder types. These types are reportedly not used by other applications.

Note: Refer to the Mediant 2000 & TP-1620 SIP Release Notes for the supported coders.

C.1	Payload Types Defined in RFC 1890
		Table C-1: Packet Types Defined in RFC 1890
Payload Type		Description	Basic Packet Rate [msec]
	0	G.711 µ-Law	10,20
	2	G.726-32	10,20
	4	G.723 (6.3/5.3 kbps)	30
	8	G.711 A-Law	10,20
	18	G.729A	20
	200	RTCP Sender Report	Randomly, approximately every 5 seconds (when packets are
			sent by channel)
	201	RTCP Receiver Report	Randomly, approximately every 5 seconds (when channel is
			only receiving)
	202	RTCP SDES packet
	203	RTCP BYE packet
	204	RTCP APP packet

C.2 Defined Payload Types

Table C-2: Defined Payload Types (continues on pages 201 to 202)

Payload Type	Description	Basic Packet Rate [msec]
35	G.726 32 kbps	20
36	G.726 24 kbps	20
38	G.726 40 kbps	20
39	G.727 16 kbps	20
40	G.727 24-16 kbps	20
41	G.727 24 kbps	20
42	G.727 32-16 kbps	20
43	G.727 32-24 kbps	20
44	G.727-32 kbps	20
45	G.727 40-16 kbps	20
46	G.727 40-24 kbps	20
47	G.727 40-32 kbps	20
49	NetCoder 4.8 kbps	20
50	NetCoder 5.6 kbps	20
51	NetCoder 6.4 kbps	20
52	NetCoder 7.2 kbps	20

Version 4.4 201 July 2005