Version 5.8 433 October 2009
SIP User's Manual 6. Configuration Parameters Reference
Parameter Description
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.
Notes:
For this feature to be functional, you must also set the
parameter RTPRedundancyDepth to 1 (i.e., enabled).
Currently, the negotiation of “RED” payload type is not
supported and therefore, it should be configured to the
same PT value for both parties.
Web: RFC 2198 Payload Type
EMS: Redundancy Payload Type
[RFC2198PayloadType]
RTP redundancy packet payload type, according to RFC
2198.
The range is 96 to 127. The default is 104.
Note: This parameter is applicable only if the parameter
RTPRedundancyDepth is set to 1.
Web: Packing Factor
EMS: Packetization Factor
[RTPPackingFactor]
N/A. Controlled internally by the device according to the
selected coder.
Web/EMS: Basic RTP Packet Interval
[BasicRTPPacketInterval]
N/A. Controlled internally by the device according to the
selected coder.
RTP Directional Control
[RTPDirectionControl]
N/A. Controlled internally by the device according to the
selected coder.
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