Mitel Deutschland GmbH 68635RFP36U-01 User Manual
SIP-DECT OM System Manual
70
5.4.3.3 RTP settings
You can set RTP parameters in the RTP settings section.
You can set RTP parameters in the RTP settings section.
•
RTP port base: Each RFP needs a continuous port area of 68 UDP ports for RTP voice streaming.
The RTP port base is the start port number of that area. Default is “16320”.
•
Preferred codec 1 – 4: Specifies a customized codec preference list which allows you to use the
preferred codecs. The Codec 1 has the highest and Codec 4 the lowest priority.
Note: With SIP-DECT Release 3.0 or higher the voice codecs G.722
(wideband), G.711 u-law, G.711 A-law and G.729 A are
supported. The previously supported codec G.723 is no longer
available.
supported. The previously supported codec G.723 is no longer
available.
•
Preferred packet time (10, 20 or 30 msec): Determines the length of voice samples collected before
sending out a new RTP packet. A small setting improves voice quality at the expense of data
transmission overhead. Default is “20” milliseconds.
transmission overhead. Default is “20” milliseconds.
•
Silence suppression: Enables automatic silence detection in the RTP voice data stream to optimize
the data transfer volume.
•
Receiver precedence on CODEC negotiation:
- The ON (option is enabled) setting means:
- The ON (option is enabled) setting means:
The CODEC selection for incoming SDP offers based on the own preference order list. The first
entry in the OMM preferred codec list matching an entry in the incoming SDP offer will be selected.
entry in the OMM preferred codec list matching an entry in the incoming SDP offer will be selected.
- The OFF (option is disabled) setting means:
The CODEC selection based on the preference order list of incoming SDP offer. The first entry in
the incoming order list matching an entry of OMM preferred codec list will be selected. This is the
default and is as recommended in RFC 3264.
the incoming order list matching an entry of OMM preferred codec list will be selected. This is the
default and is as recommended in RFC 3264.
•
Eliminate comfort noise packets: If this feature is activated, then comfort noise packets are
removed from the RTP media stream which causes gaps in the sequence numbers. This can be used
if comfort noise packets e.g. in G.711 media streams disturb voice calls in certain installations.
if comfort noise packets e.g. in G.711 media streams disturb voice calls in certain installations.
•
Single codec reply in SDP: If this feature is activated, the OMM answers to SDP offers (included in
the SIP signalization) with a single codec in the SDP answer.