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Communication Manager Maintenance-Object Repair Procedures
334 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
The AC power supply produces the following DC outputs: +5 VDC, -5 VDC, -48 VDC, +12 VDC,
and a battery-charging voltage. The DC outputs distribute power on the cabinet backplane to
the circuit pack slots.
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
Multicarrier 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:
- 15 seconds in a PN cabinet
- 10 minutes in the expansion control carrier in the “A” position of a PN cabinet
● Some AC-powered multicarrier cabinets (MCCs) contain three 48-Volt 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. Every port circuit pack is 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 87: 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 every test passes, run the long test sequence. Refer to each
appropriate test’s description, and follow its recommended procedures.
0Any AnyAnytest environment UU sh r 1
513 Any AC Power Query test
(#78)
WRN OFF test environment UU sh r 1