Busy Lamp Field (BLF) monitors a Line on another User’s Device and allows them to see when that Line is on or receiving a call through a lamp indication on the sidecar of their phone. 

Prior to beginning configuration, please be aware of the following: 

BLF is only available for configuration on devices — such as the HDV230, HDV330 and HDV20, UT133, UT136, UT248 — that have integrated function keys or an added sidecar. Device Button Functions will not appear for incompatible devices. 
BLF can also be used to monitor a parked call to identify if a call is held with a parked room.

Reserved Function Keys
Some functions keys will appear with a padlock next to them on your [Functions] tab. This is to prevent users from editing these keys. These keys are left open to prevent any BLF indicators to be configured on a line meant for incoming calls.

Configuring BLF 

A. Click on the [Phone] icon on the left navigation bar followed by Devices.



B. Once you have done so, the Devices menu will populate, from here click on the [Edit] button, denoted by a pencil, beside the device you wish to configure to show the Edit Device section. 


C. From here, select the [Functions] tab to begin configuring BLF. 



D. Leave Lines 1-4 for sending and transferring calls and begin configuring your Device Functions from Line 5. Click on the [Edit] ,denoted by a pencil, beside the line you wish to configure.


E. From Chose a type: options BLF when configuring Busy Lamp Field. 

F. Enter the Display Name you wish to associate with the chosen Line and click [Save.]

G. The user will now see the BLF displayed on the assigned line. To Delete the BLF you click on the Delete button Denoted by a Trash Can. Also from here the user can click on the [Edit] button, denoted by a pencil, beside the device you wish to configure to show the Edit Device section. 



Repeat these steps on each Line you wish to configure with BLF.