AT&T MERLIN LEGEND System Reference Manual page 309

Features
Transfer
System Programming
Related Features
2-260 Park
A user can also park calls by pressing the Transfer button and dialing his or her
own extension. DLC system operators can press Transfer and dial a system
operator park zone. When this method is used, the transfer must be completed
by pressing the Transfer button or by hanging up. This method cannot be used
by QCC system operators.
Assign Park Interval (30-300 seconds in 10-second increments). The factory
setting is 180 seconds.
Options -> CallParkRtn
Hold
Transfer