GAI-Tronics 028-02-3191-652 Installatie- en gebruikershandleiding - Pagina 5
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3.
Operation / Testing
When connected to a telephone line, the telephone will draw a constant
current of 6mA on-hook and the illuminated panel will be lit.
Pressing the button with the handset on hook will cause the display to flicker
briefly. This will have no other effect and neither a call nor a fault will be
initiated
Lifting the handset will cause the phone to loop the line – dial tone should be
heard but a call will not be initiated.
Pressing the button will cause a timed loop break (approx 100ms) which
should initiate a call. Refer to the relevant PETS instructions for call
connection timings.
The loop break duration is independent of how long the button is held
pressed. Keeping the button pressed will still only result in a 100ms break.
3.1. Call timer
The phone has a selectable call timer that can limit the maximum call duration
to approximately 7 minutes.
When on, the timer forces the phone back off line after the preset time. This
prevents the line remaining tied if the handset is left off-hook. The timer is
factory-set to OFF by default.
3.2. Handset integrity alert
If the handset integrity loop is broken (most commonly because the handset
has been damaged or torn off), the illumination will not be lit and the on hook
current will be almost zero. This should cause PETS to signal an alarm.
Note that a terminating resistor should not be fitted across the telephone
terminals.
ILC-1117 Titan Illuminated Crossing Telephone
5