Yealink SIP-T21 E2 User Manual page 82

User Guide for the SIP-T21(P) E2 IP Phone
For more information on the valid values for the Account field, refer to
on page 68.
4. Click Confirm to accept the change.
Note
The default value of minimum and maximum length is 1 and 15 respectively.
Area code is configurable via web user interface only.
You can block some specific numbers (up to 10) 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".
To add a block out number via web user interface:
1. Click on Settings->Dial Plan->Block Out.
2. Enter the desired value in the BlockOut Number field.
3. Enter the desired line ID in the Account field or leave it blank.
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Replace Rule