Advanced Features
439
Values
already an active call on the IP phone.
1-Enabled, the IP phone will automatically answer the intercom call while there is already an active call on
the IP phone and place the active call on hold.
Default 0
Web UI Features->Intercom->Intercom Barge
Phone UI Menu->Features->Intercom->Intercom Barge
Parameter features.intercom.barge_in_dialing.enable <y0000000000xx>.cfg
Description
It enables or disables the intercom call to answer an incoming intercom call while dialing.
Note: It works only if “features.intercom.barge” is set to 0 (Disabled).
Permitted
Values
0-Disabled, the IP phone handles the intercom call like a normal incoming call.
1-Enabled, the IP phone stops dialing, and automatically answers the intercom call.
Default 0
Parameter features.intercom.headset_prior.enable <y0000000000xx>.cfg
Description
It configures the channel mode to use when receiving an incoming intercom call.
Note: It is not applicable to CP920 IP phones.
Permitted
Values
0-Speaker Mode
1-Headset Mode, it works only if you connect the headset to the IP phone and the headset mode is activ-
ated for use.
Default 1
Parameter
account.X.alert_info
[1]
<MAC>.cfg
Description
It configures the Alert-Info header for intercom feature.
The value format likes: <sip:notused>; answer-after=0.
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.
Permitted
Values
String within 256 characters
Default Blank
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for T41P/T41S/T27G,
X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
CSTA Control
User Agent Computer Supported Telecommunications Applications (uaCSTA) is explained in detail in Using CSTA for
SIP Phone User Agents (uaCSTA) and Services for Computer Supported Telecommunications Applications Phase III.
The uaCSTA feature on the phone may be used for remote control of the phone from computer applications such as PC
softphone. You can use the application to control the phone to perform basic call operations. For example, place a call,
answer a call, end a call and transfer a call to another party.
It is not applicable to T19(P) E2/CP920 IP phones.
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