Connecting The Battery Backup Unit To The System - Mitel 300 Installation And Maintenance Manual

Connecting the battery backup unit to the system

The Battery back up provides full operation of the system for approximately one hour in the
event of a power failure. The battery will support 11 erlangs of voice traffic for 1 hour.
An erlang is a measure of telephony traffic. 1 erlang = 1 circuit fully occupied for 1hour
The Battery back up consists of the 12 V battery and the charger unit
Before installing the battery charger unit ensure that the system is
powered down by disconnecting the mains.
To install the unit, remove the blanking cover on the left side of the CCU.

Open the CCU main cover by releasing the four 'quarter turn' screws

Slide the BBU in about half way.

There are three cables connected to the charger unit. One with a connector, which
connects to the PSU and two with spade connectors that are connected to the
battery.

Connect the cable with the connector to the PSU (Power Supply Unit).

Thread the two cables for the battery up the cable guide to the battery compartment.

Push the charger unit home.

Replace the CCU cover.
Mitel 3000 Australia Installation and Maintenance Manual
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Battery charger connector
on the PSU