AT&T MERLIN Plus Training Manual page 31

To end/begin a call (or to use a switchhook flash):
Action
1. Touch the Recall button below the
dial pad.
2. Begin the next call or continue with
the switchhook operation.
Result
If Recall was used to finish a call,
the call is disconnected and you'll
hear a dial tone.
If Recall was used as a
switchhook, the line sounds like it
is on hold.
25