Cisco SPA 501G Administration Manual page 130

Configuring Security, Quality, and Network Features
Configuring Voice Codecs
Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
Parameter
G723 Enable
G726-16 Enable
G726-24 Enable
G726-32 Enable
G726-40 Enable
Release Unused
Codec
DTMF Process AVT
Silence Supp Enable
Description
To enable the use of the G.723a codec at 6.3 kbps, select yes.
Otherwise, select no.
Defaults to yes.
NOTE Not applicable to the WIP310 or SPA 525G.
To enable the use of the G.726 codec at 16 kbps, select yes.
Otherwise, select no.
Defaults to yes.
NOTE Not applicable to the WIP310 or SPA 525G.
To enable the use of the G.726 codec at 24 kbps, select yes.
Otherwise, select no.
Defaults to yes.
NOTE Not applicable to the WIP310 or SPA 525G.
To enable the use of the G.726 codec at 32 kbps, select yes.
Otherwise, select no.
Defaults to yes.
To enable the use of the G.726 codec at 40 kbps, select yes.
Otherwise, select no.
Defaults to yes.
NOTE Not applicable to the WIP310 or SPA 525G.
Allows the release of codecs not used after codec negotiation
on the first call so that other codecs can be used for the
second line. To use this feature, select yes.
Defaults to yes.
Select yes to process RTP DTMF events. Otherwise, select no.
If this parameter is set to no, the AVT payload type is not
included in outbound SDP.
Defaults to yes.
To enable silence suppression so that silent audio frames are
not transmitted, select yes. Otherwise, select no. See
"Ensuring Voice Quality" section on page
Defaults to no.
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