Operational Features
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41-001343-02 REV05 – 07.2014
Busy Lamp Field (BLF)
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.
BLF Setting
(For use with Asterisk and sipXecs servers)
On 8 and 11-Line LCD phones, the busy and idle indicators show on the IP phone screen display next to the softkey or
programmable key configured for BLF functionality. When the monitored user is idle, an icon with the handset on-hook
shows next to the BLF softkey or programmable key. When the monitored user is on an active call, a small telephone icon
is shown with the handset off-hook.
On 3-Line LCD phones, the LED lights next to each BLF programmable key illuminate steady to indicate the monitored
line is off-hook or unregistered. The LED goes off when the line is idle.
On the 6739i , the busy and idle states are indicated by icons as well as by the color of the softkey button on screen (i.e.
red for busy, black for idle).
On the 6867i, the busy and idle states are indicated by the color of the softkey button on screen (i.e. red for busy, green
for idle)
as well as the LED indicators (i.e. solid for busy and off for idle).
You can configure a BLF key on the IP Phones using the configuration files or the Aastra Web UI.
BLF/List Setting
(For use with the BroadSoft BroadWorks Rel 13 or higher platform only)
The BLF/List feature on the IP phones is specifically designed to support the BroadSoft BroadWorks Rel 13 Busy Lamp
Field feature. This feature allows the IP phone to subscribe to a list of monitored users defined through the BroadWorks
web portal.
In addition to monitoring the idle and busy state, the BLF/List feature also supports the ringing state. When the moni-
tored user is idle, there is a small telephone icon shown with the handset on-hook. When the monitored user is in ring-
ing state, there is a small bell icon shown. When the monitored user is on an active call then a small telephone icon is
shown with the handset off-hook.
On 3-Line LCD phones, the LED lights next to each BLF programmable key illuminate steady to indicate the monitored
line is off-hook or unregistered. The LED goes off when the is idle. When the monitored extension is ringing, the LED
flashes.
Note:
BLF feature availability is dependant on your call manager.
Note:
You can configure a maximum of 50 BLFs on the M670i, and M675i Expansion Modules. You can configure a maximum
of 48 BLFs on the M680i Expansion Modules.
Note:
The BroadWorks BLF feature is not the same as the BroadWorks Shared Call Appearance (SCA) feature and does not per-
mit call control over the monitored extension.
