Panasonic KX-UT133 Manual page 15

A flashing LED for the respective function key indicates an incoming call to the extension. To pick up
the call, simply press the flashing function key. In order to pick up calls, all parties must be
members of a pick-up group. You have now picked up the call.
If the monitored extension (Busy Field Light (BFL)) is busy, the LED for the respective function key
remains lit.
Intercom
Program any extension to one of your function keys, to then be able to communicate with this
extension directly via the intercom by pressing this function key. However, the other party must also
have the intercom activated on their telephone. Intercom refers to a conventional intercom system
(similar to walkie-talkies), directly connecting you to the other party's speaker by pressing the
assigned function key.
Function code
You can also program functions such as call forwarding to function keys by entering various codes
(see "Functions via control codes (* codes)" leaflet). Pressing the programmed function key then
activates or deactivates this function.
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