AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 242

Modifications
This chapter contains instructions for adding trunks, auxiliary equipment, or
more telephones to an existing system. It includes the following:
The actions that you must take to add to the system
The interrelated options or features that you should consider
The forms that must be revised or completed
To modify the system, perform the following tasks:
1. Decide what to change and identify the programming needed.
2. Complete (or revise) the appropriate planning forms.
3. Program the modification using instructions in System Programming .
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Modifications