AT&T MERLIN LEGEND Analog Direct-Line Console Operator's Manual page 47

Handling Calls
Handling Unsuccessful Transfers
Unsuccessful transfers result when the extension you are
calling is busy or unanswered. The call returns to your console
for further handling.
You can take a message from the caller and use
Send/Remove Message to turn on your co-worker's message
light. Or you can continue trying to connect the call with
Barge-In for an emergency or if you have been instructed
to interrupt
Camp-On to put a transferred call on hold for a preset time
(If the call is unanswered, it rings back at your console.)
Paging to broadcast announcements over co-workers'
speakerphones or over a loudspeaker system
Park and Paging to put a call on hold and page a
co-worker to pick up the call from another phone
For more on these features, see Chapter 4.
2-14 T r a n s f e r r i n g C a l l s