AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 731

Feature Quick Reference
Summary: Selective Callback
Telephones
Mode
Programmable by
Programming Code
Display Label
Call Waiting
With Call Waiting turned on, a user on a call will know that another call is waiting.
User hears one beep for a waiting inside call, two for an outside call.
Summary: Call Waiting
Telephones
Mode
Programmable by
Programming Code On:
Display Label
Camp-On
Assign a button to allow a user to complete a transfer to a busy extension.
Summary: Camp-On
Telephones
Mode
Programmable by
Programming Code
Display Label
5–16
Centralized Telephone Programming
All
All
User and system manager
*
All
All
User and system manager
Off:
Analog multiline and MLX telephones (except QCC)
All
User and system manager