2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 76)

Function Description (for Advanced Users) 4.4
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Triphony
Triphony provides interconnection of audio units. This mode can be activated by
pressing the TRIPHONY button in the machine room (see the preceding subsection), in
the lift shaft or on the lift cabin roof (audio units No. 913612E).
This mode features a different setting of the automatic HandsFree mode. The
microphones of active audio units are less sensitive than those operating in the ALARM
mode.
Triphony terminating options
 Machine room telephone hang-up;
 TRIPHONY button repressing;
 Timeout expiration;
 Giving priority to incoming or alarm calls.
Checking Call
The checking call is an automatically generated outgoing call, typically established
every 3 days. The purpose of the checking call is to supervise the system function.
Typically, this call is processed automatically in the dispatching office.
Incoming Call
The dispatching office may call back to LN. The CU receives any incoming call
automatically, identifies itself and offers a voice menu (DISA). This helps the caller to
access the required audio unit. Like outgoing calls, incoming calls are time-limited and
easily controlled (prolongation, end).
If the operator calls back and wants to get connected to the audio unit from which the
preceding call was made, enter 0 in the voice menu.
Incoming call voice menu
Hello! This is communicator ID number.../serial number...
Choose the lift number by pressing 1 to 8.
For connection with the cabin choose 1.
For the machine room choose 2.
For the shaft bottom choose 3.
And for the cabin roof choose 4.
Press 9 for services.
Enter the service password. Press 5 to end the call.