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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-7AC-POWER
10
AC-POWER
AC Power for AC-Powered Systems
NOTE:
For environment maintenance, PPN or EPN cabinet configuration aspects
in a high or critical reliabilty system are irrelevant.
The environment maintenance strategy to be used depends on both the cabinet
configuration and the type of powering. Also refer to the DC-POWER (DC Power)
for environment maintenance strategy.
The AC Power MO represents the AC power provided to the system from a wall
outlet. The AC power comes from the wall outlet, through the Power Distribution
Unit (PDU), if installed, and is then distributed to the various cabinets. The
battery charger monitors AC power via fuse F3. See Figure 10-1. If no PDU is
installed, the power is supplied directly to each cabinet from each individual wall
outlets.
When the system loses power (for example, a power outage in the building), a
Major alarm is logged against AC Power and the system goes on battery backup,
which is known as Nominal Power Holdover (NPH). If power is restored before
the NPH time expires, the alarm is resolved. Each basic control cabinet has
separate batteries for NPH. The nominal power holdover provided is as follows:
■ The batteries power the system for 10 seconds in a PPN cabinet, for 15
seconds in an EPN cabinet, and for 10 minutes in the control carrier in a
standard reliability system.
■ The batteries also provide system power for five minutes in the control
carrier in high and critical reliability systems.
!
WARNING:
Before powering down a cabinet or carrier that contains DEFINITY AUDIX
circuit packs (TN566), first power down the AUDIX unit to avoid damaging
the AUDIX software. Instructions for powering down this unit are in the
"DEFINITY AUDIX System Power Procedures" in Chapter 5, "Routine
Maintenance Procedures", on the circuit pack, and in DEFINITY AUDIX
documentation.
1. Where P is an appropriate port network number determined via the PORT field from
the Alarm or Error Log.
MO Name (in
Alarm Log) Alarm Level Initial Command to Run
1
Full Name of
MO
AC-POWER WARNING test environment P AC Power