Yealink SIP-T2 SERIES Administrator's Manual page 492

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
2. Select the desired value from the pull-down list of Play Local DTMF Tone.
3. Click Confirm to accept the change.
You can mute the microphone of the active audio device during an active call, and then
the other party cannot hear you. If allow mute feature is disabled, you cannot mute an
active call.
Procedure
Allow mute can be configured using the configuration files or locally.
Configuration File
Local
470
<y0000000000xx>.cfg
Web User Interface
Configure allow mute feature.
Parameters:
features.allow_mute
Configure allow mute feature.
Navigate to:
For
SIP-T48G/T46G/T42G/T41P/T40P/T29G/
T27P/T23P/T23G/T21(P) E2/T19(P)
E2/CP860:
http://<phoneIPAddress>/servlet?p=
features-general&q=load
For SIP VP-T49G:
http://<phoneIPAddress>/servlet?m
=mod_data&p=features-general&q