Operation Manual

Cisco SPA IP Phone Field Reference
Ext Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 308
A
G726-32 Enable To enable the use of the G.726 codec at 32 kbps,
select yes. Otherwise, select no.
Defaults to yes.
G726-40 Enable 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 Cisco SPA525G or
Cisco SPA525G2.
Release Unused
Codec
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.
DTMF Process AVT 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.
Silence Supp Enable To enable silence suppression so that silent audio
frames are not transmitted, select yes. Otherwise,
select no.
Defaults to no.
DTMF Tx Method Select the method to transmit DTMF signals to the far
end: InBand, AVT, INFO, Auto, InBand+INFO, or
AVT+INFO. InBand sends DTMF using the audio path.
AV T sends DTMF as AV T events . INFO use s t he S IP
INFO method. Auto uses InBand or AVT based on the
outcome of codec negotiation.
Defaults to Auto.
Parameter Description
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