Instruction manual

Features
Power Failure Transfer
At a Glance
Users Affected
Telephone users, operators
Mode
All
Telephones Single-line telephones
Hardware
If ground-start trunks are used in the Hybrid/PBX mode, a
KS23566,L1 ground-start button is required on single-line sets
used during power failure.
Description
Power Failure Transfer (PFT) provides incoming and outgoing service through
the use of power failure telephones during a commercial power failure.
A power failure telephone is a single-line telephone connected to a PFT jack on
a 400, 400 LS/TTR, 800, 800 GS/LS, 408, 408 GS/LS, or 408 GS/LS-MLX
module. Each module has one PFT jack for each series of four line jacks, for
example, the 800 and 800 GS/LS modules each have two PFT jacks.
When a power failure occurs, all calls are dropped and the power failure
telephone automatically goes on. It can be used to make and receive calls on
the trunk connected to the first (lowest) trunk jack on that module.
Considerations and Constraints
The power failure telephone does not function and cannot be used to make or
receive calls when the system is operating normally.
System features and restrictions are not available when PFT occurs.
Telephone Differences
Multiline Telephones
Multiline telephones cannot be used as power failure telephones.
346 Power Failure Transfer