User Guide

Configuring the Yealink EXP40 Expansion Module
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If you leave this field blank, the LCD screen of the EXP40 expansion module will display
“Prefix: ‘the value specified in the Value field’ ” (e.g., Prefix: 0592).
5. Click Confirm to accept the change.
Local Group
You can configure an Ext key as the local group key. Then you can press the local group key to
access the pre-defined contact group in the local directory quickly.
To configure an Ext key as the local group key:
1. Click on Dsskey->Ext Key.
2. In the desired Ext key field, select Local Group from the pull-down list of Type.
3. Enter the desired value in the Label field or leave it blank.
If you leave this field blank, the LCD screen of the EXP40 expansion module will display the
selected group name.