AT&T MERLIN LEGEND Release 2.0 Analog Direct-Line Console Operator's Manual page 25

About Your Direct-Line Console
Use the ICOM buttons 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.
Line/feature buttons can be programmed as inside Auto Dial
buttons. This feature enables one-touch dialing of extension
numbers. The buttons are labeled accordingly.
You might also have some of the line/feature buttons
programmed as operator feature buttons. These operator-
specific features are used to cover telephones after hours,
turn on a co-worker's message light, leave messages on a
display telephone, or alert you of a system problem. You can
also program any remaining unlabeled buttons with additional
features using a simple button programming procedure.
Line and DSS Buttons
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