Sdp Payload Types - Linksys SPA921-NA Administrator's Manual

Chapter 5 SPA900 Series Phone Field Reference

SDP Payload Types

The configured dynamic payloads are used for outbound calls only where the 900 Series phone
presents the SDP offer. For inbound calls with a SDP offer, 900 Series phone follow the caller
dynamic payload type assignments.
900 Series phone uses the configured codec names in its outbound SDP. 900 Series phone
ignores the codec names in incoming SDP for standard payload types (0 – 95). For dynamic
payload types, 900 Series phone identifies the codec by the configured codec names.
Comparison is case-insensitive.
Field
NSE Dynamic Payload
AVT Dynamic Payload
INFOREQ Dynamic Payload
G726r16 Dynamic Payload
G726r24 Dynamic Payload
G726r32 Dynamic Payload
G726r40 Dynamic Payload
G729b Dynamic Payload
NSE Codec Name
AVT Codec Name
G711u Codec Name
G711a Codec Name
Document Version 3.0
Description
NSE dynamic payload type. The valid range is 96-127.
The default is 100.
AVT dynamic payload type. The valid range is 96-127.
The default is 101.
INFOREQ dynamic payload type.
There is no default.
G.726-16 dynamic payload type. The valid range is 96-127.
The default is 98.
G.726-24 dynamic payload type. The valid range is 96-127.
The default is 97.
G.726-32 dynamic payload type.
The default is 2.
G.726-40 dynamic payload type. The valid range is 96-127.
The default is 96.
G.729b dynamic payload type. The valid range is 96-127.
The default is 99.
NSE codec name used in SDP.
The default is NSE.
AVT codec name used in SDP.
The default is telephone-event.
G.711u codec name used in SDP.
The default is PCMU.
G.711a codec name used in SDP.
The default is PCMA.
Linksys 900 Series IP Phone Administrator Guide
SIP Tab
5-15