AT&T MERLIN LEGEND Release 2.0 System Programming Manual page 361

Programming Procedures
Valid Entries
Inspect
Copy Option
Console Procedure
PC Procedure
3-270 Analog Multiline Telephones without Built-in Speakerphones
Extension numbers
Yes
No
Extensions BIS/HFAI
Exit E x i t
[F6] [F8]
Type ext. no.
Dial ext. no. Enter
[F10] [F5] [F5]