434
V7122 GatewayUser Guide
A
PPENDIX
E:
RTP/RTCP
P
AYLOAD
T
YPES
AND
P
ORT
A
LLOCATION
RTP Payload Types are defined in RFC 3550 and RFC 3551. We have added new payload
types to enable advanced use of other coder types. These types are reportedly not used by
other applications.
Payload Types Defined in RFC 3551
Table 93
Packet Types Defined in RFC 3551
Payload Type
Description
Basic Packet Rate [msec]
0 G.711
µ-Law
10,20
2 G.726-32
10,20
3 GSM-FR
20
4
G.723 (6.3/5.3 kbps)
30
8 G.711
A-Law
10,20
12 QCELP 20
18 G.729A/B
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
Defined Payload Types
Table 94
Defined Payload Types
Payload Type
Description
Basic Packet Rate [msec]
3 MS-GSM 40
3 GSM-EFR 20
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