To Add A Block Out Number Via Web User Interface - Yealink SIP-T42G User Manual

For more information on the valid value of the Account field, refer to
on page 59.
4. Click Confirm to accept the change.
Note
The default values of minimum and maximum length are 1 and 15 respectively.
Area code is configurable via web user interface only.
You can block specific numbers (up 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.
Customizing Your Phone
Replace Rule
63