AT&T MERLIN LEGEND Release 2.0 MLX Direct-Line Consoles Operator's Manual page 27

About Your Direct-Line Console
Use the ICOM buttons labeled with inside extension numbers
for inside calls only.
You can use SA buttons for inside and outside calls. You
must first dial a dial-out code (such as 9) to make an outside
call on an SA button.
Use any button labeled with a telephone number to make or
receive outside calls only. It is a direct outside line that does
not need a dial-out code.
On a console with no attached DSS, line buttons can be
programmed as inside Auto Dial buttons. This feature
enables one-touch dialing of inside extensions. The buttons
are labeled accordingly. See Chapter 4 for a description of
Auto Dial.
Your system might have a few line buttons programmed as
operator feature buttons. These operator-specific features
are used to turn on a co-worker's message light, leave a
message on a display telephone, or alert you to a system
problem. You can also program any remaining unlabeled
buttons with additional features using a simple button
programming procedure. See Chapter 4 for more information
on features available to you.
Line and DSS Buttons
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