Features and Specifications Manual B - 9
Battery Backup - System
Memory
B-4
FEATURE
DESCRIPTION
A battery is provided on the CPUB( )-U10 ETU for Electra Elite 192 system or
MBD-U10 Unit in the B48-U10 KSU for the Electra Elite 48 system to retain
System Program Memory when power fails. When fully charged, the battery
maintains backup power for approximately 21 days. System Data, Speed Dial
Memories, and Clock/Calendar functions are protected by the backup battery.
After power is restored, the system returns to normal operation.
SYSTEM
AVAILABILITY
Terminal Type:
Not applicable
Required Components:
None
OPERATING
PROCEDURES
SERVICE
CONDITIONS
Restrictions:
Battery backup on the CPUB( )-U10 ETU/MBD-U10 Unit does not
protect the following:
1. Automatic Callback
2. Off-line Status (for programming system or station
assignments)
3. Automatic Redial
4. Trunk Queuing
General:
The battery connector on the CPUB( )-U10 ETU/MBD-U10 Unit should
be disconnected during long term storage but must be connected
(protection against loss of power) just before installation to provide
battery backup for System Memory.
None
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