Yealink EXP40 - Manual (Page 17)

Configuration
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If you leave this field blank, the LCD screen will display the default label “Transfer”.
5. Click Confirm to accept the change.
You can configure a DSS key as the hold key. You can hold a call or retrieve a held call
by pressing the hold key.
To configure a DSS key as the hold key:
1. Click on DSSKey->Ext Key.
2. In the desired DSS key field, select Hold 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 will display the default label “Hold”.
4. Click Confirm to accept the change.