Safety Precautions during installation
and system upgrades
Always unplug or isolate the mains supply when installing or
upgrading the system.
After installing the central control unit (CCU) and all required
modules, ensure that the following points are checked before
switching the mains power on:
• The cabled extensions have a DTMF telephone or a (V8/V16)
Featurephone connected.
• The CCU cover is in place and locked.
After switching on the Mains allow approximately 30 seconds for the CCU to go through
its power up routine.
Electrostatic precaution (ESP)
The BT Versatility contains electrostatic components. To ensure long-term reliability of
the system, electrostatic precautions should be taken when handling any of the system
PCBs that are not enclosed in plastic. An ESP pillar is located on the CCU MDF.
Lightning and surge voltage protection
Extension cabling should not be exposed to high voltage surges,
(for example, surges induced by lightning or neighbouring high
current-carrying cables). If this is a possibility, external protection
of the Main Equipment and Extensions using ‘earthed line surge
protectors’ is essential.
BT Versatility
Installation and Maintenance Manual
3
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