NEC UNIVERGE SL2100, Features And Specifications Manual

Page: 110 / 978

Battery Backup - System Memory
Description
The battery on the CPU retains the Clock/Calendar 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 and Caller-ID History can be copied to the system drive on
the CPU-C1.
Conditions
• The battery on the CPU-C1 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 CPU-C1 battery every three years.
• During normal operation, the battery is continually recharged using a built-in charging circuit from
the CPU-C1.
• 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
- Caller ID History
Default Settings
None
The battery must be installed on the CPU-C1 prior to programming a customer database.
System Availability
Terminals
Not applicable
Required Component(s)
None
Related Features
Battery Backup - System Power
SL2100 ISSUE 1.0
1-96 Battery Backup - System Memory
B