AT&T MERLIN LEGEND Release 3.0 System Programming Manual page 190

Telephones
Program Extensions
Although you can make selections from the screen (with the ListFeature
option) to assign Ring and Voice buttons, the following procedure provides the
programming codes to perform these functions. Using the codes speeds the
button assignment process.
When you enter the programming code for assigning a Ring button, the screen
in Step 6 of the following procedure changes to the first List Feature screen,
then returns to the screen shown in Step 6.
Table 3-2 provides the programming codes for assigning Ring and Voice
buttons. You can handle errors in data entry as follows:
If you enter a feature code incorrectly while programming, the display
shows the Programming Error message and the red LED next to the
button flashes. If this happens, press the button again and repeat the
procedure.
If you make a mistake and program the wrong feature on a button, press
the button, select Delete ( [ F1 ] on the PC ), and press the button again.
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Common Administrative Procedures
Procedure