User Guide

Using the Yealink EXP20 LCD Expansion Module

phone.

For more information on adjusting the backlight on the phone, refer to the

Backlight

section of

Yealink phone-specific user guide

Using the Busy Lamp Field

The busy lamp field (BLF) feature allows you to monitor the status change of users through BLF

LED indicators. For example, you can configure a BLF key on the connected EXP20 LCD

expansion module to monitor the status of a friend’s line (busy or idle). For more information on

configuring an Ext key as the BLF key, refer to Busy Lamp Field (BLF) on page 12.

The BLF key LED illuminates solid red when the monitored line is in use. The BLF key LED

illuminates solid green when the monitored line is idle. For more information on BLF key LED

indications, refer to LED Instructions on page 3.

You can also press a BLF key to dial out the monitored phone number when the monitored line

is idle and pick up calls that are received on the monitored line. When there is an active call on

the host phone, you can transfer the active call to the monitored phone number directly by

pressing the BLF key.

For more information on using BLF feature on the phone, refer to the

Busy Lamp Field (BLF)

section of

Yealink phone-specific user guide

Resetting the Yealink EXP20 LCD Expansion Module

You can reset the EXP20 LCD expansion module to clear all configurations by resetting the host

phone. The reset process of the EXP20 LCD expansion module is synchronized with the host

phone.

To reset the EXP20 LCD expansion module connected to the host phone:

1. Press Menu->Advanced (default password: admin) ->Reset Config->Reset to factory.

2. Press the Reset soft key.

The LCD screen prompts the following warning:

3. Press the OK soft key.