Operation Manual

administration.fm
A31003-C1000-M102-5-76A9, 09/2017
OpenScape Desk Phone CP200/CP205/CP400/CP600 HFA, Administration Manual
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Administration
Speech
3.12.2 Codec Preferences
If Silence suppression is activated, the transmission of data packets is suppressed on no con-
versation, that is, if the user doesn’t speak.
The OpenScape Desk Phone CP phone provides the codecs G.711, G.722, and G.729. When
a HFA connection is established between two endpoints, the phones negotiate the codec to be
used. The result of the negotiation is based on the general availability and ranking assigned to
each codec. The administrator can allow or disallow a codec as well as assign a ranking num-
ber to it.
The Packet size, i. e. length in milliseconds, of the RTP packets for speech data, can be set to
10ms, 20ms, 30ms, 60ms or to automatic detection.
Data required
• Silence suppression: Suppression of data transmission on no conversation.
Value range: "On", "Off"
Default: "Off"
• Packet size: Size of RTP packets in milliseconds.
Value range: "10 ms", "20ms", "30ms", "60ms", "Automatic"
Default: "Automatic"
• G.711: Parameters for the G. 711 codec.
Value Range: "Choice 1", "Choice 2", "Choice 3", "Disabled", "Enabled"
Default: "Choice 1"
• G.729: Parameters for the G. 729 codec.
Value Range: "Choice 1", "Choice 2", "Choice 3", "Disabled", "Enabled"
Default: "Choice 2"
• G.722: Parameters for the G. 722 codec.
Value Range: "Choice 1", "Choice 2", "Choice 3", "Disabled", "Enabled"
Default: "Disabled"