Using BLF to Determine a Line State

Busy Lamp Field features (BLF) allow you to view the state of a phone line that is associated with a speed-dial button, call log, or directory listing on your phone. If you use BLF Pickup, you can answer a ringing call for the line that you are monitoring. Your system administrator determines which BLF features are configured for your phone.

If you want to...

Then...

 

 

 

 

 

See the state of a line

Look for BLF indicators next to the line number:

listed in a call log or

 

 

Line is in-use.

 

directory

 

 

 

 

 

Line is idle.

 

 

 

 

 

 

 

 

 

See the state of a

Look for BLF indicators next to the line number:

speed-dial line

 

 

Line is in-use.

 

 

 

 

 

 

 

 

Line is idle.

 

 

 

 

BLF- monitored line is ringing (BLF Pickup)

 

 

 

Use BLF Pickup to

Press the BLF Pickup button

while the line is ringing.

answer a call ringing on

The call is redirected to the next available line on your phone. (If you want

a coworker’s phone

to specify a line, first press a line button, then press the BLF button.)

 

 

If your phone supports auto-pickup, the call connects automatically.

 

Otherwise, the call rings on your phone for you to answer.

 

If you press the BLF Pickup button when the monitored line is not ringing,

 

your phone will speed dial the line number.

 

 

 

 

 

Tips

Your phone might play an audible indicator to alert you when a call is ringing on the monitored line (BLF Pickup only).

BLF Pickup answers the oldest ringing call first (if the line that you are monitoring has more than one ringing call).

Making and Receiving Secure Calls

Depending on how your system administrator has configured your phone system, your phone might support making and receiving secure calls.

Your phone can support these types of calls:

Authenticated call—The identities of all phones participating in the call have been verified.

Encrypted call—The phone is receiving and transmitting encrypted audio (your conversation) within the Cisco IP network. Encrypted calls are also authenticated.

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Cisco Systems 7931G manual Using BLF to Determine a Line State, Making and Receiving Secure Calls