CHAPTER 7. ROUTINE MAINTENANCE
Power Failure
If commercial power fails, the system’s battery backup will keep the attendant console
operating for a short time.
When this time expires, the Power Failure Transfer feature will
automatically activate, and the console will not operate. When power is restored, ” all
consoles are restored to normal operation.
When power fails, all active calls and all calls on hold will be lost. Also, a power failure
affects the following features and requires corrective action:
• Attendant Control of Trunk Group Access—reestablish control of desired trunk
groups.
• Call Forwarding All Calls—reactivate Call Forwarding All Calls for desired extension
numbers.
Ž Controlled Restrictions—reestablish control of desired voice terminals or groups of
voice terminals.
Ž Night Service—
reactivate Night Service as desired.
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