NEC SL1000, Features And Specifications Manual

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Battery Backup - System Memory
Description
The battery on the CPU retains the Clock/Calendar and Last Number Redial (LNR) buffers for each
station when the CPU 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 Nonvolatile Memory and can be
erased only by performing a First Initialization.
For additional storage time and the database can be copied to the Compact Flash card on the CPU.
Conditions
• The battery on the CPU should be removed during long term storage but must be installed (protec-
tion 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 CPU battery every three years.
• During normal operation, the battery is continually recharged using a built-in charging circuit from the
CPU.
•
Battery backup on the CPU does not protect the following:
- Callback
- Off-line Status (for programming system or station assignments)
- Repeat Redial
- Trunk Queuing/Camp-On
Default Settings
None
The battery must be installed on the CPU prior to programming a customer database.
System Availability
Terminals
Not applicable
Required Component(s)
None
Related Features
Battery Backup - System Power
Guide to Feature Programming
Program
Number
Program Name Default
90-03-01 Save Data not assigned
ISSUE 1.0 SL1000
B
Battery Backup - System Memory 1-48