Linksys SPA9000 Administration Manual page 167

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SDP Payload Types section
The SDP Payload types defines the naming/numbering conventions for the audio codecs used
by the SPA9000 when communicating with the ITSP network. Naming should match the ITSP
names used. The default values are adequate in most circumstances.
NOTE: These settings need to be compatible with the ITSP network settings. The ITSP you use
will inform you about any specific setting you need to modify on these areas. These parameters
have impact on the signaling and audio reliability.
• Dynamic Payloads: The configured dynamic payloads are used for outbound calls only
where the SPA9000 presents the SDP offer. For inbound calls with a SDP offer, the
SPA9000 follows the caller dynamic payload type assignments.
• Codec Names: The SPA9000 uses the configured codec names in its outbound SDP. The
SPA9000 ignores the codec names in incoming SDP for standard payload types (0 – 95).
For dynamic payload types, the SPA9000 identifies the codec by the configured codec
names. Comparison is case-insensitive.
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
Linksys Voice System Administration Guide
NSE dynamic payload type. The valid range is 96-127.
Default: 100
AVT dynamic payload type. The valid range is 96-127.
Default: 101
INFOREQ dynamic payload type.
Default: blank
G.726-16 dynamic payload type. The valid range is 96-127.
Default: 98
G.726-24 dynamic payload type. The valid range is 96-127.
Default: 97
G726r32 dynamic payload type.
Default: 2
G.726-40 dynamic payload type. The valid range is 96-127.
Default: 96
G.729b dynamic payload type. The valid range is 96-127.
Default: 99
NSE codec name used in SDP.
Default: NSE
AVT codec name used in SDP.
Default: telephone-event
G.711u codec name used in SDP.
Default: PCMU
G.711a codec name used in SDP.
Default: PCMA
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