AT&T MERLIN LEGEND System Reference Manual page 387

Features
Single-Line Telephones
Mode Differences
Hybrid/PBX
Behind Switch
2-338 Speed Dial
To dial a Personal Speed Dial number, the multiline user presses the Feature
button and dials the Personal Speed Dial code (01-24) associated with the
number. For analog multiline telephones without a programmed Feature button,
the user dials # and the Personal Speed Dial code.
Users with MLX-20L telephones can program a Personal Directory instead of
Personal Speed Dial codes. Users with MLX-28D telephones and analog
multiline telephones with more than 10 buttons should program Auto Dial
buttons for quick dialing.
System Speed Dial
QCC system operators cannot use System Speed Dial.
To dial a System Speed Dial number, all other multiline telephone users press a
System Speed Dial button programmed with the code. The user can also lift the
handset, press the Feature button, and dial the System Speed Dial Code
(600-729) associated with the number. For analog multiline telephones without a
programmed Feature button, the user selects an Intercom or System Access
button, lifts the handset, and dials # and the System Speed Dial code.
To dial a Personal Speed Dial or System Speed Dial number, the single-line
telephone user lifts the handset (must be listening to internal dial tone) and dials
# and the Speed Dial code (01-24 for Personal Speed Dial codes; 600-729 for
System Speed Dial codes).
In the Hybrid/PBX mode, pool dial-out codes or the Automatic Line Selection
code can be included with the telephone number in Personal Speed Dial or
System Speed Dial codes. To allow time to receive a local telephone company
dial tone, one or two pause characters must be programmed immediately
following a pool dial-out code (pauses are not needed following the ARS code)
or an access code for a long-distance carrier. Pause characters are entered by
pressing the Hold button.
When Automatic Route Selection (ARS) is used, # should be pressed twice to
program a Personal Speed Dial or System Speed Dial code for a 7-digit toll
number. This signals the end of the dialing sequence.
In the Behind Switch mode, the user can program any dial-out codes required
by the host system Personal Speed Dial or System Speed Dial codes.
To allow time to receive a local telephone company dial tone, one or two pause
characters must be programmed immediately following a pool dial-out code,
required by the host system, or an access code for a long-distance carrier.
Pause characters are entered by pressing the Hold button.