AT&T MERLIN LEGEND Release 3.0 Programming Summary Manual page 373

General Feature Use and Telephone
Programming
Programming Methods
Telephones can be programmed by dialing programming codes or on
MLX display phones by selecting features from the display. An analog
multiline telephone cannot be programmed by selecting features from the
display.
To program a telephone, first enter programming mode:
On analog multiline telephones, slide the Test/Program (T/P) switch
on the side of the telephone to P, or lift the handset, or press
Speakerphone and dial #00.
On MLX-10 telephones, press the Feature button and dial 00.
On MLX display telephones, use the same procedures as the
MLX-10 or enter programming mode by selecting Ext Program
from the menu screen on the display.
See the appropriate user or operator guide for more information.
NOTE:
Features can also be programmed onto individual telephones through
Centralized Telephone Programming. The steps for using programming
codes vary depending on the telephone. Tables D-2 through D-4 list the
basic steps for programming each telephone type.
Programming Summary D-13