Blf - Denwa Communications DW-820 User Manual

Click Edit Member, or hold the existed member, it will pop up a prompt to
2)
delete the member.

5.3 BLF

Busy Lamp Field (BLF) is used to monitor a specific user for status changes on IP
phones. For example, you can configure a BLF key on a supervisor's phone to monitor
the phone user status (busy or idle). When the monitored user places a call, a busy
indicator on the supervisor's phone indicates that the user's phone is in use.
Enter the dial interface, click BLF button.