AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 842

General System Programming Sequence
Complex Lines
Program DS1 trunks
Program tie lines
Program DID trunks
Program PRI trunks
Program BRI trunks
Telephones
Many programmers prefer to program Auxiliary Equipment before
programming Telephones.
Assign trunks to telephones
Copy trunk assignments
Identify Principal User for Personal Line
Assign ring, voice, outgoing only, shared buttons
More
Copy telephone button assignments
More
Identify analog multiline telephones with BIS or HFAI
Identify analog multiline telephones requiring Voice Announce to Busy
More
System Programming
G–3