AT&T MERLIN LEGEND System Reference Manual page 358

Features
Queued Call Console
Speed Dial
Station Message Detail
Recording
System Access
Transfer
System Programming
A Recall button cannot be programmed on a QCC.
The Conference button is pressed to enter the Flash special character, which
simulates pressing the Recall button, in a Personal Speed Dial or System Speed
Dial telephone number.
If a multiline user presses the Recall button to get a new dial tone, the SMDR
timing is stopped for the previous call and timing begins for a new call.
Recall can be used on ringing (unanswered) inside calls when the call is made
on an Intercom or System Access button. Recall cannot be used on an Intercom
or System Access button when the user reaches a busy extension.
A single-line telephone user with a Recall button can use the Recall button to
transfer a call.
Change the Recall Interval if users are experiencing difficulty in making calls
after pressing the Recall button. The possible settings are 350 ms, 450 ms,
650 ms, and 1 second.
Options -> More -> RecallTimer
Recall 2-309