Features and Specifications Manual
B4 – 121
Doc.
No. 8201 -
Release 1.0
July 2003
Battery Backup -
System Memory
B-4
FEATURE
DESCRIPTION
A battery is provided on the CPUI( )-U( ) ETU, to retain System Program
Memory if power fails. When fully charged, the battery maintains backup
power for approximately 21 days. System Data, Speed Dial Memories, and
Clock/Calendar are among the functions protected by the backup battery.
When 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 CPUI( )-U( ) ETU 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 CPUI( )-U( ) ETU Unit should be
disconnected during long term storage but must be connected
(protection against loss of power) at the time of installation to provide
battery backup for System Memory.
When fully charged, the battery retains System Memory for
approximately 21 days.
Not applicable: