NEC Univerge SV8100 System Hardware Manual page 161

UNIVERGE SV8100/SV8300
6.7
System Hardware Manual
6.6.7 External Tone Ringer/Night Chime Output
Output Level: –10 dBm
Output Impedance: 600 Ω
Relay Contact Rating: 500 mA, 24 Vdc
6.6.8 SMDR Output
Female Connector (LAN) Standard DB-9 (straight)
6.6.9 PC Connection
Female Connector (LAN) Standard DB-9 (straight)
6.6.10 Relay Contact
All Relay Contact Ratings: 500 mA, 24Vdc
Battery Backup
The SV8300 system has battery backup functions for system backup and for
memory backup.
6.7.1 System Backup (Optional)
During a power failure, the system is backed up using a
rechargeable battery. This battery backup supports all system
operations for approximately 30 minutes.
6.7.2 Memory Backup
The CPU Blade battery retains the Clock/Calender and Last Number
redial (LNR) buffers for each station when the CPU Blade
encounters a power loss. With a fully charged battery, the settings
are retained for about three years. The System Programmed
memory (Customer Database) is stored in non-volatile Memory and
can be erased only by a First Initialization. After power is restored,
the system Blade returns to normal operation.
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