
administration.fm
A31003-C1000-M101-1-76A9, 03/2016
OpenScape Desk Phone CP200/400/600, Administrator Documentation
233
Administration
Speech
3.18.2
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 CP200/400/600 phones provide the codecs
G.711
,
G.722
,
and
G.729
. When a SIP 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"
•
Allow "HD" icon
: If "On" an additional icon is shown when codec G.722 is used.
Value range: "On", "Off"
Default: "On"
•
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"