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2.2 Installation of the Hybrid IP-PBX
40 Installation Manual
2.2.6 Backup Batteries Connection
The backup batteries and Back-up Battery Cable provide backup power supply to allow full use
of the Hybrid IP-PBX in the event of a power failure. In case of power failure, the backup
batteries automatically maintain the power for the Hybrid IP-PBX without interruption.
Be sure to comply with applicable local regulations (e.g., law, guidelines).
1. Turn off the power switch of the Hybrid IP-PBX.
2. Connect the Back-up Battery Cable with 3 identical VRLA (Valve Regulated Lead Acid)
batteries (12 V DC × 3).
• Turn on the power switch of the Hybrid IP-PBX only after the installation of the Hybrid IP-
PBX is finished and AC power is turned on.
• For 1 backup battery, battery capacity of 28 Ah or below is recommended (otherwise, the
backup battery may not be charged).
• Make sure that the type and capacity of the 3 backup batteries are identical.
• The Back-up Battery Cable should not be exposed to direct sunlight. Keep the Back-up
Battery Cable and the backup batteries away from heating appliances and fire. Place the
backup batteries in ventilated place.
• For details about the backup batteries, refer to the manual intended for the batteries.
CAUTION
• Make sure that the polarities of the backup batteries and wiring are correct.
• Make sure that you do not short the backup batteries or cables.
• There is a danger of explosion if backup batteries are incorrectly replaced. Replace
only with the same or equivalent type recommended by the manufacturer. Dispose of
used batteries according to the manufacturer’s instructions.
• Use the correct type of Back-up Battery Cable.
Back-up Battery Cable
Backup Batteries (12 V DC x 3)
Red
Black
Battery Connector
Fuse
Power Switch