Yealink SIP-T2XP Administrator's Manual page 54

Administrator's Guide for SIP-T2xP and SIP-T19P 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 this 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.
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