Cisco IP Phone 7961G - Manual (Page 47)

Advanced Call Handling
Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.1 39
Using BLF to Determine a Line State
Depending on configuration, you can use the Busy Lamp Field (BLF) to determine the state of another
phone line that is associated with a speed-dial button, call log, or directory listing on your phone. You
can place a call to this line, regardless of the BLF status. This feature does not prevent dialing.
If you want to... Then...
See the state of a
speed-dial line Look for one of these indicators next to the line number:
+ Line is in-use.
+ Line is idle.
BLF indicator unavailable for this line.
+ Line is in Do Not Disturb state.
See the state of a line
listed in a call log or
directory Look for one of these indicators next to the line number:
Line is in-use.
Line is idle.
BLF indicator unavailable for this line.
Line is in Do Not Disturb state.
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 is capable of supporting 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.
• Non-secure call—At least one of the participating phones or the connection does not support these
security features, or the phones cannot be verified.