Version 5.8 355 September 2009
SIP User's Manual 6. Configuration Parameters Reference
6.15.5 RTP, RTCP and T.38 Parameters
The RTP, RTCP and T.38 parameters are described in the table below.
Table 6-59: RTP/RTCP and T.38 Parameters
Parameter Description
Web: Dynamic Jitter Buffer Minimum
Delay
EMS: Minimal Delay (dB)
[DJBufMinDelay]
Minimum delay (in msec) for the Dynamic Jitter Buffer.
The valid range is 0 to 150. The default delay is 10.
Note: For more information on Jitter Buffer, refer to
''Dynamic Jitter Buffer Operation'' on page 414.
Web: Dynamic Jitter Buffer
Optimization Factor
EMS: Opt Factor
[DJBufOptFactor]
Dynamic Jitter Buffer frame error / delay optimization factor.
The valid range is 0 to 13. The default factor is 10.
Notes:
 Set to 13 for data (fax and modem) calls.
 For more information on Jitter Buffer, refer to ''Dynamic
Jitter Buffer Operation'' on page 414.
Analog Signal Transport Type
[AnalogSignalTransportType]
Determines the analog signal transport type.
 [0] Ignore Analog Signals = Ignore (default)
 [1] RFC2833 Analog Signal Relay = Transfer hookflash
using RFC 2833
Web: RTP Redundancy Depth
EMS: Redundancy Depth
[RTPRedundancyDepth]
Determines whether the device generates redundant
packets. This can be used for packet loss, where the
missing information (audio) can be reconstructed at the
receiver end from the redundant data that arrives in the
subsequent packet(s).
 [0] 0 = Disable the generation of redundant packets
(default).
 [1] 1 = Enable the generation of RFC 2198 redundancy
packets (payload type defined by the parameter
RFC2198PayloadType).
Note: The RTP redundancy dynamic payload type can be
included in the SDP, by using the parameter
EnableRTPRedundancyNegotiation.
Web: Enable RTP Redundancy
Negotiation
[EnableRTPRedundancyNegotiation]
Determines whether the device includes the RTP
redundancy dynamic payload type in the SDP, according to
RFC 2198.
 [0] Disable (default)
 [1] Enable
When enabled, the device includes in the SDP message
the RTP payload type "RED" and the payload type
configured by the parameter RFC2198PayloadType.
a=rtpmap:<PT> RED/8000
Where <PT> is the payload type as defined by
RFC2198PayloadType. The device sends the INVITE
message with "a=rtpmap:<PT> RED/8000" and responds
with a 18x/200 OK and "a=rtpmap:<PT> RED/8000" in the
SDP.
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