Dualcom Mk2 Registration
These Registration instructions are for VDN Dualcom Mk2 only.
Whenever you apply power to the Dualcom by:
a). Moving the Power Switch to the On position.
b). Connecting the power supply and pluging-in the internal battery.
c). Briefly shorting the Reset pins.
the Dualcom will ‘register’ onto the VDN network.
Moving the Power Switch to the Off position will disconnect the external supply
and the internal battery thus fully powering-down the Dualcom.
Always re-register the Dualcom (by briefly shorting the Reset pins) whenever
it is moved to a new location and during regular maintenance visits. Re-register-
ing allows the Dualcom to recognise any new base stations that may have
been commissioned in your area.
To register a Dualcom:
1. Connect power to Dualcom or briefly short the Reset pins.
2. The SERVICE LED will start to flash and the VDN LED will be on solid. The
SERVICE LED will continue to flash for about 45 seconds. It should then
remain on solid and the VDN LED will go off. This indicates that registration
is complete and Dualcom is ‘locked’ onto a VDN base station.
If the SERVICE LED does not remain on solid after 45 seconds, registration
has failed. This is normally due to low (or no) signal strength. If the site survey
and radio signal strength prediction (see page 5) indicated a suitable signal
strength, check the aerial connections, power supply signal strength LEDs and
then repeat the registration procedure.
During registration:
1. Dualcom logs (up to 14) base stations that it can hear.
2. Dualcom will ‘lock’ onto the base station with the strongest signal.
3. The VDN network enables the Dualcom to send alarms.
All of these three functions must be completed before registration is successful
and signals can be passed to the ARC.
Occasionally during installation it may be necessary to ‘Force Register’ a Du-
alcom. If this action is required you will be informed by a Help Desk. Following
Force Registration you must NOT move the Power Switch to the Off posi-
tion for 24 hours, and you must NOT disconnect the internal battery for
24 hours. The external power to Dualcom may be removed for short periods
and re-connected as required during the 24 hour period.
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