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2-46 41-001134-05, Rev 00, Rel. 1.1
AastraLink Pro 160 IP Phone User Guide
Monitoring Calls Using Busy Lamp Field (BLF)
The BLF feature allows you to use your IP phone to monitor another IP phone
extension for state changes (busy or idle). To use the BLF feature, you configure a
BLF softkey on your phone, and specify the name and extension of the person you
want to monitor.
For example, suppose a Supervisor wants to keep track of how often Bob Jones is
on the phone. The Supervisor configures a BLF softkey to monitor Bob’s
extension. Whenever Bob picks up his phone, a “busy” indicator appears on the
Supervisor’s phone. When Bob ends the call, an “idle” indicator appears.
If your IP phone is already configured with a BLF softkey, then you can tell
whenever the extension is “busy” or “idle” as follows:
• On the 55i, 57i, and 57i CT, the “busy” and “idle” indicators are icons that
appear next to the BFL softkey. When the extension you are monitoring is
“busy,” a small telephone icon appears with the handset off-hook. When the
extension is “idle,” an icon with the handset on-hook appears.
• On the 9143i and 53i, the LED light next to each BLF softkey illuminate
when the extension you are monitoring is “busy”. The LED goes off when the
line is “idle.”
For instructions on configuring a BLF softkey for your phone, see “Configuring
SoftKeys For Your IP Phone”on page 3-25.
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