NEC NEAX 2400 IPX Reference Manual page 12

Group Call Pick Up
To answer another extension in your group:
Lift handset*.
Press Pick or dial
Direct Call Pick Up
To answer a specific extension in your group or
another:
Lift handset*.
Dial
Call Waiting – Operator
To hold one call and answer a second call waiting:
Whilst on a call, hear call waiting tone (one short
tone).
Press Answer.
Second call is now connected.
You can now swap between calls by pressing
Answer.
When finished with one call, hang up and second
call will ring back.
Manager/Secretary Transfer
Secretary:
Lift handset and press Manager's ringing line.
Ask the caller to wait.
Press Manager's line again; Intercom is activated.
Announce call to Manager.
12
plus extension number of ringing phone.
.