Table of Contents

Setup A DSS / BLF - Speed Dial Key

The Yealink T4x series has a number of buttons that can be programmed to do a large number of actions. The most common ones are to setup a Busy Lamp Field (BLF) or speed dial.

BLF vs Speed Dial

A BLF should be used if you are setting it up for an internal extension. A BLF key functions as both a speed dial and a status indicator. You can press the key to call that extension or transfer a call to them, but the colors will also change depending on their status so you can know if they are on the phone or not before calling them.

A speed dial should be used for setting up a button to call to an outside number. This can be to a cell phone or any other third party phone where the status of the caller can't be monitored.

Setup a BLF

  1. Press and hold the button you want to setup until the configuration menu displays.



  2. Configure the following options
    Type: BLF
    Account ID: Line 1
    Label: Label
    Value: Extension you want to assign
    Extension: Leave blank. See below for advanced options.

Call Intercept with BLF

Rather than leaving the Extension blank, you can use a special star code to enable call intercept. Call intercept allows you to use the same BLF key to retrieve a call that is ringing on that person's phone. The star code is different depending on if your company uses 3-digit extensions or 4-digit extensions. Enter the correct star code in the "extension" field above.

3-digit extensions: *34
4-digit extensions: *35

Setup a Speed Dial

  1. Press and hold the button you want to setup until the configuration menu displays.



  2. Configure the following options
    Type: Speed Dial
    Account ID: Line 1
    Label: Label
    Value: Phone number you want to assign