INSTALLATION-DK 16 KSU & PCB

SECTION 100-816-205

MARCH 1993

17 DK16 POWER FAILURE EMERGENCY

TRANSFER OPTION

17.00A dedicated standard telephone can be con- nected to the Power Failure Transfer Interface (PF1) on the DK16 Base Unit to provide power failure backup. During normal operation, this tele- phone cannot be used—it does not count as a station; so it does not reduce the system's 20 maximum station capacity. But if there is a power failure, the telephone will automatically be con- nected to CO line 1. When power is restored, the system will automatically resume with its normal station and CO line assignments, and the dedi- cated telephone will become inoperative again.

17.10DK16 Power Failure Emergency Transfer Installation. Install the dedicated emergency stan- dard telephone as follows (see Figure 5-24):

1)Connect a standard telephone to the PF1 connector in the Base Unit.

17.11DK16 Power Failure Emergency Trans- fer Test.

1)Turn the system power switch off.

2)Lift the emergency standard telephone hand- set, and verify that there is CO dial tone.

 

DK8 OR DK16

POWER AVAILABLE

MDF

KSU MAIN PCB

CONNECTION

 

 

 

2

 

T

3

KCOU

CO

 

 

CO LINE 1

LINE

 

 

 

R

4

 

 

5

 

 

MOD JACK CO1

 

 

(BASE UNIT)

POWER FAIL

 

 

MDF

 

CONNECTION

R

 

 

T

 

 

PFT

 

 

STANDARD

 

 

TELEPHONE

MOD JACK PF1

 

 

 

 

(BASE UNIT)

 

FIGURE 5-24

DK16 BASE UNIT POWER FAILURE TRANSFER (PFT) CIRCUIT DIAGRAM

5-36

Page 106
Image 106
Toshiba DK 16 17 DK16 Power Failure Emergency Transfer Option, DK16 Base Unit Power Failure Transfer PFT Circuit Diagram