AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 134

Features
Camp-On Return Time
Call Park Return Time
Automatic Callback
Camp-On Return Time is the number of seconds a caller waits when a person
uses the Camp-On feature to complete the transfer of a call to a busy telephone.
If the telephone is still busy at the end of the programmed interval, the call
returns to the person who transferred the call.
You can change the factory-set 90-second interval to 30-300 seconds.
Planning Form Instructions
Under the "Camp-On Return Time" heading on Form 6f, do one of the
following:
Check "90 seconds" to keep the factory-set interval.
Check the second box to change the fatory-set interval. Write the
number of seconds in the space provided.
Call Park Return Time is the number of seconds a caller waits when a person
uses the Call Park feature to put a call on hold. If the call is not picked up at the
end of the programmed interval, the call returns to the person who parked the
call.
You can change the factory-set 180-second interval to 30-300 seconds.
Planning Form instructions
Under the "Call Park Return Time" heading on Form 6f, do one of the
following:
Check "180 seconds" to keep the factory-set interval.
Check the second box to change the factory-set interval. Write the
number of second in the space provided.
Automatic Callback enables the system to automatically complete calls to busy
trunks or extensions as soon as the extension or trunk becomes available.
The system alerts the user that the call is ready for completion by ringing the
telephone. If the user does not answer within a certain number of rings, the
system cancels the request. The number of rings before the system cancels the
request is called the Automatic Callback Interval.
You can change the factory-set Automatic Callback interval of three rings to one
to six rings.
System Features 4-29