Yealink SIP-T20 User Manual page 61

3. Enter the desired line ID in the A ccount field or leave it blank.
For more information on the valid values of A ccount field, refer to
page 45.
4. Click Conf irm to accept the change.
Not e
The default values of minimum and maximum lengths are 1 and 15 respectively.
Area code is configurable via web user interface only.
You can block specific numbers from being dialed on your phone. When you dial a
block out number on your phone, the dialing will fail and the LCD screen will prompt
―Forbidden Number‖. You can add 10 block out rules at most on your phone.
To add a block out number via web user interface:
1. Click on Se t tings->Dial Plan->Block Out.
2. Enter the desired value in the BlockOut Number field.
Customizing Your Phone
Replace Rule on
49