Yealink SIP-T48G - Manual (Page 92)

User Guide for the SIP-T48G IP Phone
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For more information on the valid value of the Account field, refer to Replace Rule
on page 78 .
4. Click Confirm to accept the change.
Note
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 touch 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.
The default values of minimum and maximum length are 1 and 15 respectively.
Area code is configurable via web user interface only.