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Communication Manager Maintenance-Object Repair Procedures
776 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Figure 41: Power-Distribution Unit (J58890CH-1)
Power Backup
The small battery is at the center rear of the multicarrier cabinet. This 8-AH (Amp Hour) battery
is fused for short circuit protection and is charged by the J58890CH-1. The batteries also
contain a thermal sensor that changes the charging voltage depending on battery temperature.
The small batteries provide short-term battery holdover. If AC power fails, 48-V DC 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
Figure 42: Small Battery Assembly
on page 777 shows the small battery assembly.