AT&T MERLIN LEGEND Release 4.0 Feature Reference page 339

Feature Reference
Other Multiline Telephones
To redial a number using Last Number Dial on a multiline telephone, select the
appropriate personal line (outside line) or SA button for the call, and then either
press the programmed Last Number Dial button or press the Feature button
and dial . The number saved by the feature is dialed automatically. On MLX
display telephones, press the Feature button and select
from the display.
Single-Line Telephones
To redial a number using Last Number Dial, lift the handset (the telephone must
connect to an SA or ICOM line) and then dial
dialed is dialed automatically.
Feature Interactions
Authorization Code
Auto Dial
Digital Data Calls
Direct Station
Selector
Directory
Display
Inspect
Microphone Disable
After activating the Authorization Code feature, Last Number Dial cannot
be used. Once the Authorization Code feature is deactivated, Last
Number Dial can be used and contains the last number dialed before
the Authorization Code feature was activated.
Last Number Dial does not store numbers dialed using an inside Auto
Dial button. If a number containing special characters is dialed using an
outside Auto Dial button, the special characters do not work when the
number is redialed using Last Number Dial.
Terminal Adapters can use Last Number Dial by dialing the Last
Number Dial feature code.
An extension number dialed by pressing a DSS button is not stored for
Last Number Dial.
Last Number Dial does not store a number dialed using a Personal,
Extension, or System Directory.
When a user presses a programmed Last Number Dial button, the digits
appear on the display as if the user were dialing them from the dialpad.
In Release 1.0 and 1.1. when a user presses Inspct and then a
programmed Last Number Dial button,
the display.
In Release 2.0 and later, when a user presses Inspct and then a
programmed Last Number Dial button, the saved number appears on
the display.
When an MLX telephone user's microphone is disabled, pressing the
programmed Last Number Dial button before lifting the handset turns on
the speakerphone so the user can hear the number being dialed.
However, the user must lift the handset to talk once the call is
answered.

[
. The number that was last
Last Number Dial
]
appears on
339