Features and Specifications Manual P - 9
Power Failure Transfer p
-4
FEATURE
DESCRIPTION
Power Failure Transfer ensures that a customer has access to the Central
Office network during a power outage. The CO/PBX tip and ring are
automatically transferred to the tip and ring of a preselected Single Line
Telephone. The Single Line Telephone can function in the system during
normal operation or be used during a power failure. Each B64-U10 KSU
provides three circuits for this feature. The B48-U10 KSU provides one circuit
for this feature. When power returns, any ongoing conversation is
disconnected.
SYSTEM
AVAILABILITY
Terminal Type:
Single Line Telephones
Required Components:
SLI(4)/(8)-U10 ETU
OPERATING
PROCEDURES
SERVICE
CONDITIONS
Data Assignment:
Use memory Block 7-1 (Card interface Slot Assignment) to specify the
SLI(4)/(8)-U10 ETU.
General:
The Single Line Telephones that are installed must provide dialing
signals accepted by the outside exchange (Dial Pulse or Dual-Tone
Multifrequency).
Only Single Line Telephones crossconnected at the MDF can be used
for this feature.
Single Line Telephones and outside lines connected during power failure
are fixed one-to-one.
A CO/PBX line is automatically switched to a locally provided
Single Line Telephone when total system power is lost, and
system battery backup expires.
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