AT&T MERLIN LEGEND Release 3.0 Programming Summary Manual page 363

General Feature Use and Telephone
Programming
Feature Button (analog multiline telephones only)
Headset/Handset Mute
Headset Status
Headset Hang Up
Notify
Posted Messages (available from display on MLX display
telephones)
Saved Number Dial
Signaling
Feature Codes
Feature codes are 1-, 2-, and 3-digit codes that activate features, A feature
code is used by first pressing the dedicated Feature button on MLX
telephones; pressing a programmed Feature button on analog multiline
telephones; dialing # on single-line telephones. Each of these methods
sends a signal to the system that a feature code is about to be dialed.
When the code is dialed, the feature is activated
NOTE:
Queued Call Console (QCC) system operators cannot use the feature codes.
The following features can be used only by dialing feature codes:
Call Pickup
Forward/Follow Me—Cancel One
Forward/Follow Me—Cancel All
Message Cancel
Personal Speed Dial
System Speed Dial
Programming Summary D-3