Yealink SIP-T23P User Manual page 154

User Guide for the SIP-T23P/G IP Phone
To register an account and configure BLA feature on phone A via web user interface:
1. Register the account 14019833020.
2. Click on Advanced, and then select Draft BLA from the pull-down list of Shared
Line.
3. Enter the desired number in the BLA Number field.
154