Yealink T5 Series Administrator's Guide

Advanced Features
343
Busy Lamp Field
The Busy Lamp Field (BLF) feature enables the IP phone to monitor specific remote lines for state changes on the
phone.
Yealink phones support two methods of BLF configuration:
l Configure a line key as BLF key to monitor a specific remote line
l Configure BLF List to monitor a list of specific remote lines
The BLF feature enables the following functions to the users:
l Monitor the status of line on their phone
l Display caller ID information
l Answer incoming calls to the monitored line (called directed call pickup)
l Park and retrieve calls to the monitored line
l Initiate an outgoing intercom call to the monitored line
l Barging In an Active Call by BLF List Key
Topics
BLF Key Configuration
BLF List Configuration
State Indicator of Remote Line
BLF/BLF List Subscription
Visual and Audio Alert for Monitor Lines
LED Mode for BLF/BLF List Key
BLF Key Configuration
You can configure a BLF key for a specific line.
The following shows the configuration of a BLF key for Bill.
linekey.X.type=16
linekey.X.line=1
linekey.X.value=1001
linekey.X.label=Bill
Related Topic
Line Keys Configuration
BLF List Configuration
You can configure a BLF List for monitor phone. It enables the monitor phone to subscribe to a list of lines, and receive
status notifications of the monitored lines.
Note
The IP phone subscribes to a BLF list that is set up on the server. You must access the server and set up a list of monitored
lines.
The following table lists the parameters you can use to configure BLF List.
Parameter
account.X.blf.blf_list_uri
[1]
<MAC>.cfg

Yealink T5 Series Specifications

General

Brand	Yealink
Model	T5 Series
Category	IP Phone
Language	English