DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-4AC-POWER
9
The AC power supply also produces AC ringing voltage. The AC ringing voltage
output value and frequency depend on the country of use. The power supply has
a circuit breaker and EMI filtering.
Nominal Power Holdover
Multi-Carrier Cabinets
Two types of battery holdover are available:
■ The small battery assembly provides short-term battery holdover. If AC
power fails, 48 VDC 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 5 minutes in the control carrier in High and Critical
Reliability systems, and for 10 minutes in the expansion control carrier in
the "A" position of an EPN cabinet (Release 5r and higher).
■ Some AC-powered Multi-Carrier Cabinets contain three 48V batteries and
a battery charger (397C) to provide backup power in case power is
interrupted. The holdover times are identical to those above.
Single-Carrier Cabinets
A holdover circuit in the power supply allows a system to operate normally during
AC power interruptions. When AC input power fails, reserve batteries supply
power to the memory and processor circuit packs and fans for two minutes. All
port circuit packs are inactive during this time. The power supply contains a
battery charger to charge the holdover batteries.
Error Log Entries and Test to Clear Values
Table 9-1. AC Power Error Log Entries
Error
Type
Aux
Data Associated Test
Alarm
Level
On/Off
Board Test to Clear Value
0
1
1. Run the Short Test Sequence first. If all tests pass, run the Long Test Sequence. Refer to the appropriate
test description and follow the recommended procedures.
0 Any Any Any test environment UU sh r 1
513 Any AC Power Query
Test (#78)
WARNING OFF test environment UU sh r 1
