2N Lift8 v1.6.0 - Manual (Page 83)

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2N TELEKOMUNIKACE a.s., www.2n.cz
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Description: Knob+Button Version (Push-To-Talk)
The Fireman audio unit improves the fire fighting operations by setting up top priority
calls between the Fireman audio unit and the cabin and machine room audio units in
one and the same lift shaft. If any of the machine room audio units is configured as the
control centre (intercom), you can join in the Fireman call.
Install the Fireman audio unit in a dedicated space that can be easily accessed by
firemen.
The Fireman call has the highest priority, suspending all the other calls (refer to
). Function Description
Press the detent button switch or turn the knob (0 > 1) to set up the Fireman call. The
call duration is infinite. Repress the button or return the knob to stop the call. (The
detent button switch or knob is connected to terminal 3).
The Fireman call setup is signalled by the Fireman audio unit LED (mounted on the
electronics board or carried externally from connector 8). Push the button switch (Push
to talk) to activate the audio unit microphone and speak to the other audio units (the
LED starts flashing). While the button is pushed, no sound is transmitted from the
other audio units. Release the button to allow the persons at the other audio units
(cabin, machine room or machine room as intercom) to talk.
If the control-room (intercom) configured machine room audio unit is used, the
Fireman call is signalled by a green LED flashing on the audio unit. Push (for
longer than 2s) on the audio unit keypad (green LED shining) to join in the call. Push
(for longer than 2 s) on the audio unit keypad (green LED flashing) to leave the
call without terminating it.