Aastra 5i Series, Руководство администратора

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Operational Features
41-001160-01, Rev 00, Release 2.3 5-161
Configuring Operational Features
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)
On the 9480i, 9480i CT, 55i, 57i, and 57i CT, 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 the 9143i, 51i, and 53i, 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.
You can configure a BLF key on the IP Phones using the configuration files or the
Aastra Web UI.
Note:
The BLF setting is applicable to the Asterisk server only.
Note: You can configure a maximum of 50 BLFs on the 536M and 560M
Expansion Modules.