Configure the Busy Lamp Field in the Phone Configuration File
If the phone is registered to a BroadSoft server, you can use the phone configuration file to configure the busy
lamp field.
Procedure
Step 1 Edit the BLF_List_URI parameter of the phone configuration file that is available in the BroadSoft server.
Step 2 Add the List URI: sip: parameter @ domain name.
The List URI must match the one defined in the BroadSoft server.
Step 3 Save the changes.
Configure a Line Key on the Phone to Monitor a Single User's Line
You can configure busy lamp field on a phone line when a user needs to monitor a coworker's availability to
handle calls.
You can configure the busy lamp field to work with any combination of speed dial or call pickup. For example,
busy lamp field alone, busy lamp field and speed dial, busy lamp field and call pickup, or busy lamp field,
speed dial, and call pickup can all be configured to work together. But speed dial alone requires a different
configuration.
Before you begin
Access the phone administration web page. See Access the Phone Web Page, on page 92.
Procedure
Step 1 Select Voice > Phone.
Step 2 Select a line key on which to configure a busy lamp field.
Step 3 Select Disabled to disable the extension.
Step 4 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.
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
163
Phone Administration
Configure the Busy Lamp Field in the Phone Configuration File
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