Инструкция для AASTRA 53i ip phone

28 Model 53i IP Phone User Guide

5. In the "BLF List URI" field, enter the name of the BLF list defined on the 

BroadSoft BroadWorks Busy Lamp field page for your particular user. 

For example, my53i-blf-list@as.broadworks.com.

Note: Contact your System Administrator for the BLF List URI.

6. Click 

 to save your changes.

7. Click on Operation->Reset.
8. In the "Restart Phone" field click 

 to restart the IP phone.