Inter-Tel AXXESS Manual page 1519

Battery Back-Up
5.9 To provide back-up power in the event of a power failure or brownout condition, the
power supply can have optional battery back-up using a customer-provided uninterruptable
power supply (UPS) unit or a standby power supply (SPS) unit. (See SPECIFICATIONS for
more information.)
B. INSTALLATION
HIGH VOLTAGE. When the system power is turned on, the power supply unit contains
110VAC. Before inserting or removing the power supply unit, make sure that the AC
POWER switch has been turned OFF for at least five minutes. Failure to allow the high volt-
age to dissipate can cause bodily injury.
5.10 Install the power supply unit in the chassis as outlined in the following steps (see
D-5 below):
Remove the four screws securing the panel on the front of the equipment chassis and set
1.
the panel aside.
Carefully slide the power supply unit into the far left slot in the equipment chassis until
2.
it locks securely into place.
Connect the AC power cable to the front of the power supply unit.
3.
Battery Back-Up
Appendix D — CPC64/CPU64 Configuration
® ®
INTER-TEL AXXESS MANUAL VERSION 11.0 – May 2008
CAUTION
Figure
Page D-29