Yealink SIP-T3 Administrator's Manual page 516

It enables or disables the phone to play a warning tone when answering an intercom call.
Description
Note: It works only if "features.intercom.allow" is set to 1 (Enabled).
Permitted
0-Disabled
1-Enabled
Values
Default 1
Web UI Features > Intercom > Intercom Tone
Menu > Features > Intercom > Intercom Tone
Phone UI CP925/CP935W:
More > Features > Intercom > Intercom Tone
Parameter features.intercom.barge
It enables or disables the phone to answer an incoming intercom call while there is already an active
call on the IP phone.
Description
Note: It works only if "features.intercom.allow" and "call_waiting.enable" are set to 1 (Enabled) and
"phone_setting.call_appearance.calls_per_linekey" is greater than 1.
0-Disabled
Permitted
Values
1-Enabled, the phone will automatically answer the intercom call and place the active call on hold.
Default
0
Web UI Features > Intercom > Intercom Barge
Menu > Features > Intercom > Intercom Barge
Phone UI CP925/CP935W:
More > Features > Intercom > Intercom Barge
Parameter features.intercom.barge_in_dialing.enable
It enables or disables the intercom call to answer an incoming intercom call while dialing.
Description
Note: It works only if "features.intercom.barge" is set to 0 (Disabled).
0-Disabled
Permitted
Values
1-Enabled
Default 0
Parameter features.intercom.headset_prior.enable
Description It configures the channel mode to use when receiving an incoming intercom call.
0-Speaker Mode
Permitted
1-Headset Mode, it works only if you connect the headset to the IP phone and the headset mode is
Values
activated for use.
Default 1
Supported
All phones except CP920/CP925/CP935W
Devices
Parameter account.X.alert_info
It configures the value of the Alert-Info header for intercom feature.
The value format likes: <sip:XXX (X can be any value)>; answer-after=0.
Description
Note: If both Call-Info header (defined by the parameter "account.X.call_info") and Alert-Info header
are configured, the Call-Info header has a higher priority than the Alert-Info header.
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Advanced Features
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<MAC>.cfg
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