Power Failure Emergency Transfer Option; Installing Power Failure Emergency Transfer; Testing Power Failure Emergency Transfer; Figure 2-13 Base Ksu Power Failure Transfer (Pft) Circuit Diagram - Toshiba Strata DK40 Installation & Maintenance Manual

Power Failure Emergency Transfer Option

Power Failure Emergency Transfer Option
To enable this option, a dedicated standard telephone must be connected to the Power Failure
Transfer Interface (PF1) of a DK40 Base KSU equipped with a TCOU.
Note
If there is a power failure, the telephone automatically is connected to Exchange Line 1.
When power is restored, the system resumes normal station and Exchange line assignments,
and the dedicated telephone becomes inoperative again.
Important!

Installing Power Failure Emergency Transfer

Testing Power Failure Emergency Transfer

1. Turn the system power switch OFF.
2. Lift the emergency standard telephone handset, and verify that there is Exchange line
dial tone.
Exchange
Line
PFT
Standard
Telephone

Figure 2-13 Base KSU Power Failure Transfer (PFT) Circuit Diagram

Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
During normal operation, this telephone cannot be used and does not count as a
station (does not reduce the number of system's available stations).
This is not available on a DK40 system with a TBSU installed.
Connect a standard telephone to the PF1 connector in the Base KSU
(see Figure 2-13).
MDF DK40 TCOU
2
A
3
B
4
5
Screw Terminal
CO1 (Base KSU)
MDF
A
B
Screw Terminal
PF1 (Base KSU)
Power Available
Connection
Power Fail
Connection
DK40 Installation
DK40
TCOU
Exchange
Line 1
2155
2-19