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Mitel 3000
Getting Started Guide
25
Power Failure Operation
Your Mitel 3000 is provided with a basic power failure mechanism to allow the system to
continue operation in power failure situations.
Your installer will indicate the location of the phones that are automatically connected through
to lines when the system power fails. Up to one half of the equipped lines can be used to make
and receive calls.
Table 1
Lines Extension
1/2
5/6
9/10
13/14
17/18
19/20
Battery Backup Unit (BBU)
The optional BBU available with the Mitel 3000 will ensure all system configurations can
operate to full capacity for a minimum of one hour under normal load conditions.
Digital Systems
Systems populated with Digital (ISDN) Lines only will not operate in Power Fail mode. These
systems MUST be installed with the Optional Battery Back Up unit or an auxiliary
uninterruptible Power Supply (UPS)