Model 53i IP Phone User Guide
49
Line Keys and Programmable Keys
Busy Lamp Field (BLF) Key
The BLF feature on the IP phones allows a specific extension to be monitored for
state changes. BLF monitors the status (busy or idle) of extensions on the IP phone.
Example
A Supervisor configures BLFs on his phone for monitoring the status of a worker’s
phone use (busy or idle). When the worker picks up his phone to make a call, a busy
indicator on the Supervisor’s phone shows that the worker’s phone is in use and busy.
On the 53i, the busy and idle indicators are the LEDs next to each BLF
programmable key. The LED illuminates steady to indicate the monitored line is off-
hook or unregistered. The LED goes off when the line is idle.
You can set BLF on the programmable keys using the Aastra Web UI only. BLF is not
configurable from the IP phone UI.
Configuring a BLF Key
1.
Click on
Operation->Programmable Keys
.
or
Click on
Operation->Expansion Module <N>.
2.
Select a
"Key 3"
through "
Key 6
".
3.
In the "
Hard Key
" field, select
BLF
to apply to the programmable key.
4.
In the "
Value
" field, enter the phone number or extension you want to monitor.
5.
In the "
Line
" field, select a line for which to apply this programmed key. Valid
values are
Global
(for all lines), or
1
through
9
.
6.
Click
to save your changes.
Note:
The BLF setting is applicable to the Asterisk server only.
Note:
You can also use a BLF configured key to dial out. Contact your System
Administrator for more information
Aastra Web UI
