2N Fixed line replacement with 2N SmartGate - Manual v1.1.2 - Manual (Page 63)

Voice function 4.1
63
To terminate all held calls, or reject waiting call dial:
To terminating active call and accept the held or waiting call dial:
To place the active call on hold and accept the held or waiting call (switching
between two calls) or
To place the active call on hold to have possibility to dial other outgoing call dial:
To place all held calls to active calls and set up conference call dial:
To connect the two calls (active and held) and disconnect the 2N® SmartGate
from both calls dial: