Yealink SIP-T4X Administrator's Manual page 50

Administrator's Guide for SIP-T4X IP Phones
To create a block out rule 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.
If you leave the field blank or enter 0, the block out rule will apply to all accounts on
the IP phone.
4. Click Confirm to add the block out rule.
34
?p=settings-blackout&q=load