Configure the BLF List URI (previously created on the server)
Set “BLF List Feature Options” to “blf+sd+cp” (this is the default)
Configure a Line Key to Monitor a Single User's Line
Navigate to Voice à Phone
Select a line key on which to configure a busy lamp field
Select Disabled to disable the extension
In the Extended Function field, enter a string in this format:
fnc=blf;sub=xxxx@$PROXY;usr=yyyy@$PROXY
fnc=blf;sub=xxxx@$PROXY;ext=yyyy@$PROXY
Where:
fnc=blf means function=busy lamp field
sub=the URI to which the SUBSCRIBE message should be sent. For a BroadSoft server, this name must be identical to the name defined in the List URI: sip: parameter. xxxx is the name that is defined in List URI:sip: parameter. Replace xxxx with the exact defined name. $PROXY is the server. Replace $PROXY with the server address or name
usr/ext=the user that the busy lamp field monitors. yyyy is user id of the phone that the busy lamp field monitors. Replace yyyy with the exact user id of the monitored phone. $PROXY is the server. Replace $PROXY with the server address or name
(Optional) You can configure the busy lamp field to work with any combination of speed dial or call pickup. To enable the busy lamp field to work with speed dial or call pickup, enter a string in the following format in the Extended Function field:
fnc=blf+sd+cp;sub=xxxx@$PROXY;usr=yyyy@$PROXY
Where:
sd= speed dial
cp= call pickup
You can also configure the Key Expansion Module line keys as BLF+SD+CP
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