Battery Backup - NEC DSX Software Manual

Battery Backup

Battery Backup
Description
The system provides permanent backup of system memory.
In the event of commercial AC power failure, the NAND Flash memory on the CPU PCB permanently main-
tains the site database. Additionally, an internal battery on the CPU provides short-term backup of the sys-
tem date and time (Real Time Clock) and certain station parameters (such as the Caller ID log). The battery
will hold the Real Time Clock and station parameters for up to 10-14 days. When commercial AC power is
restored, the system restarts with all programming and the time and date intact.
Additional Battery Backup capability can be provided by a customer-supplied Uninterruptable Power Sup-
ply (UPS). The length of time the UPS will power the system when power fails depends on the capacity of
the UPS unit. Consult with the UPS manufacturer for the specifics. Refer to the Hardware Manual for addi-
tional details.
Conditions
• None
Default Setting
• None
Programming
None
Other Related Features
Features
When commercial AC power fails, the system does not back up the status of the following:
• Call Forwarding
• Call Waiting / Camp-On
• Do Not Disturb
• Line Queuing
• Message Waiting
• Microphone Mute
Time and Date (page 349)
The system's internal battery backs up the CPU Real Time Clock for 10-14 days.
IntraMail Features
None
Operation
If the system is properly installed, Battery Backup is automatic during AC power failures and brownouts.
38 ◆ Features
DSX Software Manual