AT&T MERLIN LEGEND System Reference Manual page 265

Features
Mode Differences
Behind Switch
Considerations
Feature Interactions
Auto Dial
Directory
2-216 Last Number Dial
In the Behind Switch mode, when a user manually dials an outside number that
includes a dial-out code (for example an Automatic Route Selection or pool dial-
out code) required by the host system, the pauses required to wait for dial tone
from some host systems are not automatically stored when list Number Dial is
used. As a result, the user may either hear a fast busy signal or reach a wrong
number when using last Number Dial.
Only one Last Number Dial button can be programmed on each multiline
telephone.
A maximum of 16 digits is saved by Last Number Dial.
Since the type of line button (Personal Line or Intercom/System Access) used
to make the call is not stored, the user must select the appropriate line button
before using Last Number Dial to redial a number.
If the user dials an incomplete number, the digits are saved.
If a user dials a telephone number and, after the call is connected, dials
additional digits such as an account number or password, Last Number Dial
saves all digits, including those dialed after the call is connected. In addition,
if someone other than the owner of a display telephone presses the last
Number Dial button, all dialed digits are shown on the display, including
confidential information such as passwords or account codes.
Last Number Dial does not store numbers dialed via an Extension, Personal
or System Directory, inside Auto Dial button, System Speed Dial code, or a
DSS button.
If the number is dialed by using an outside Auto Dial button or Personal
Speed Dial code and includes a special character such as Pause or Stop,
the special character does not work when the number is redialed by using
Last Number Dial.
A number dialed by pressing a programmed outside Auto Dial button is saved
for Last Number Dial as if it were dialed with the dialpad, but special characters
do not work. An extension dialed by pressing a programmed inside Auto Dial
button is not saved for last Number Dial.
Last Number Dial does not store a number dialed using a Personal, Extension or
System Directory.