The busy lamp field (BLF) feature allows you to monitor the call status on one or more extensions. At a glance, you can see whether someone is free to take a call.
When enabled on your desk phone, you'll see keys with the names of other people. Depending on your phone model, a status icon or light next to a name shows when the person's line is busy.
Just tap a person's name or press the soft key to call them. If the person's line is busy, your call is handled by call waiting.
BLF is provided with the phone service, but phone admins decide which phones have the feature enabled, and whose extensions should be monitored. BLF is supported on desk phones only.
Admins: To enable or manage this feature for your company or individual users, contact Support.
Note: Busy lamp field (BLF) is not available on the desktop app or conference phones.