{{tag>Handset_Features BLF Yealink Yealink_T2_Series Yealink_T4_Series Yealink_T27 Yealink_T29}}
====== How to set up BLF on Yealink T27P, Yealink T27G, Yealink T29G and Yealink T4 Series ======
This guide explains how to set up BLF, or //Busy Lamp Field// on the following handsets:

  * Yealink T27P
  * Yealink T27G
  * Yealink T29G
  * Yealink T4 Series

This guidance is also applicable to handsets in the Yealink T4 series (such as T40, T46, T48 etc).

====== Configuring BLF from the Web Interface ======
  - In your web browser, type in the IP address of your handset.\\ //To find out the IP address, press **Menu** then **1. Status** and **1. IP ** is the IP address.\\ Default username is **admin** and default password is **SUREVOIP** followed immediately by the last 6 digits of the MAC address in upper-case.//
  - Click on **DSSKey** tab along the top
  - Click on **Line Key 1-7** on the left menu
  - Fill out the required fields with the relevant extensions you wish to monitor
    * Line Key1 to Line Key7 correspond to the BLF buttons on your handset, from top-left down then top-right down.
    * Set **Type** to **BLF**
    * Set **Value** to the //extension// you wish to monitor
    * Set **Label** to something meaningful that will show on the display
    * Set **Line** to **Line 1**\\ //If your account is on a different Line then select the relevant Line//
    * Set **Extension** to **%%**%%** \\ //This is the remote call pick-up prefix//
  - Click **Confirm** to save and apply

====== Using the BLF Feature ======
When configured, the LEDs should light up accordingly.
  * **Solid Green** means extension is available. //Press BLF key to dial extension.//
  * **Solid Red** means the extension is on a call
  * **Blinking red** means the extension is receiving a phone call. //Press BLF key to perform pick-up.//