NEC ELECTRA ELITE IPK II, User Manual

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Electra Elite IPK II Document Revision 4C
Battery Backup – System Memory 2 - 101
Battery Backup – System Memory
Description
The battery on the CPUII( )-U10 ETU retains the Clock/Calendar and Last Number Redial (LNR) buffers
for each station when the CPUII( )-U10 ETU encounters a power loss. With a fully charged battery, the
settings are retained for approximately three years.
The system programmed memory (Customer Database) is stored in Non-Volatile Memory and can be
erased only by performing a First Initialization.

For additional storage time, the database and Caller ID History can be copied to the Compact Flash card on
the CPUII( )-U10 ETU.
Conditions

The battery on the CPUII( )-U10 ETU should be removed during long term storage but must
be installed (protection against loss of power) just before ETU installation to provide battery
backup for System Memory.

When fully charged, the battery retains System Memory for approximately three years.

You should replace the CPUII( )-U10 ETU battery every three years.

During normal operation, the battery is continually recharged using a built-in charging
circuit from the CPUII( )-U10 ETU.

To prevent losing Caller ID History, save the database before storing the CPUII( )-U10
ETU.

Battery backup on the CPUII( )-U10 ETU does not protect the following:

Callback

Off-line Status (for programming system or station assignments)

Repeat Redial

Trunk Queuing/Camp-On

Caller ID History
Default Settings
None

The battery must be installed on the CPUII( )-U10 ETU prior to programming a customer database.