Busy Lamp Field (BLF) Feature
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Table of Contents
Introduction:
BLF is an acronym for Busy Lamp Field, which is a light on an IP Phone or a colored indicator next to a name in a Softphone or Web client, that tells you whether another extension connected to the same PBX is busy or not.
This feature allows a Monitor Account/Extension to see the status of other extensions. By activating this function, the user will be able to:
- Check if another extension is currently on a call;
- See if there’s an incoming call to other extensions, and;
- If unanswered, User will be able to pick up the call of another extension.
Configuration:
Legend:
- Bizphone IP License - sipAAAA = Main Account (Main Extension)
- This account can see the status and monitor other accounts.
- Bizphone IP License - sipBBBB = Monitored Account (Monitored Extension)
- This account's status is monitored.
Configuration steps:
- Set up the Bizphone IP License - SIP accounts for both Main and Monitored accounts.
- Set up BLF Group.
- Set up IP Phone Function Keys.
Step 1:
Bizphone IP License can be configured either via Manual or Auto-provisioning process.
For detailed instruction, CLICK HERE.
Step 2:
Go to Bizphone app > Extensions > BLF > Create Group > Select Main Extension > Select Monitored Extension(s) > Finish
Create BLF Group
Choose Main Extension
Choose Monitored Extension(s)
Step 3:
FANVIL IP Phone
- Log in to the Device Portal
- Go to the Function Key Tab
- Randomly select DSS Key (e.g. DSS Key 2) and configure as below:
- Type = Memory Key
- Name = (Whatever you want to appear on the IP Phone keys)
- Value = Monitored Account (sipBBBB)
- Subtype = BLF/NEW CALL
- Line = Line of Main Account (sipAAAA)
- Pickup Number
- For Grouped Extensions = *8
- For Non-Grouped Extensions = Pickup Code + Ext number of Monitored Account = *8101
![](https://static.helpjuice.com/helpjuice_production/uploads/upload/image/15042/direct/1684755520373-slik3.png)
YEALINK IP Phone
- Log in to the Device Portal
- Go to the DSSKey Ta
- Randomly select DSS Key (e.g. DSS Key 2) and configure as below:
- Type = BLF
- Value = Monitored Account (sipBBBB)
- Label = (Whatever you want to appear on the IP Phone keys)
- Line = Line of Main Account (sipAAAA/Line 1)
- Extension
- For Grouped Extensions = *8
- For Non-Grouped Extensions = Pickup Code + Ext number of Monitored Account = *8101
- Go to Settings Tab
- Select Dial Plan
- Replace the dialing of sipBBBB (Monitored Account) with extension values.
- From Step 1 to Step 3:
- From Step 4 to Step 6:
Result:
When configuration steps are completed:
- Main Extension can see the Monitored Accounts on their IP Phone.
- When a call comes in to Monitored Extensions, the indicator light of the Main Extension will start blinking.
- If Monitored Extensions cannot answer calls, Main account can pick up the call simply by pressing on the blinking key.