AC-POWER
Issue 1 May 2002
8-5
555-233-143
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 an EPN cabinet
— 10 minutes in the expansion control carrier in the “A” position of an
EPN 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 8-1.
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 every test passes, run the long test sequence. Refer to each appropriate
test’s description, and follow its 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
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...