Operation Manual

Administration
A31003-C1000-M102-9-76A9, 08/2018
124 OpenScape Desk Phone CP100/200/CP205/CP400/CP600/600E HFA, Administration Manual
administration.fm
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 (not applicable for
OpenScape Desk Phone CP100), 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 number 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"