Toshiba DK 16, DK8 5-36, FIGURE 5-24 DK16 BASE UNIT POWER FAILURE TRANSFER (PFT) CIRCUIT DIAGRAM, 17 DK16 POWER FAILURE EMERGENCY TRANSFER OPTION

5-36
INSTALLATION-DK 16 KSU & PCB
SECTION 100-816-205
MARCH 1993
FIGURE 5-24
DK16 BASE UNIT POWER FAILURE TRANSFER (PFT) CIRCUIT DIAGRAM
4
3
MOD JACK CO1
(BASE UNIT)
MDF
CO
LINE
5
2
MOD JACK PF1
(BASE UNIT)
R
T
MDF
PFT
STANDARD
TELEPHONE
DK8 OR DK16
KSU MAIN PCB
T
R
POWER FAIL
CONNECTION
POWER AVAILABLE
CONNECTION
KCOU
CO LINE 1
17 DK16 POWER FAILURE EMERGENCY
TRANSFER OPTION
17.00 A 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.
17.10 DK16 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.
17.11 DK16 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.