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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
G726r40 Dynamic Payload
G729b Dynamic Payload
NSE Codec Name
AVT Codec Name
Linksys 900 Series IP Phone Administrator Guide
5-14
Determines whether the 900 Series phone includes the P-RTP-Stat header or response to
a BYE message. The header contains the RTP statistics of the current call. Select yes or
no from the drop-down menu. The format of the P-RTP-Stat header is:
P-RTP-State: PS=<packets sent>,OS=<octets sent>,PR=<packets received>,OR=<octets
received>,PL=<packets lost>,JI=<jitter in ms>,LA=<delay in ms>,DU=<call duration in
s>,EN=<encoder>,DE=<decoder>.
The default is no.
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.726-40 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.
Chapter 5
900 Series phone Field Reference
Document Version 3.1
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