Toshiba strata DK8 Installation Instructions Manual page 106

INSTALLATION-DK 16 KSU & PCB
SECTION 100-816-205
MARCH 1993
17 DK16 POWER FAILURE EMERGENCY
TRANSFER OPTION
17.00 A dedicated standard telephone can be con-
nected to the Power Failure Transfer Interface
(PFl) 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 dedicated
telephone will become inoperative again.
17.10 DKI 6 Power Failure Emergency Transfer
Installation.
Install the dedicated emergencystan-
dard telephone as follows (see Figure 5-24):
1) Connect a standard telephone to the PFl
connector in the Base Unit.
17.11 DKI 6 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.
co
LINE
DK8 OR DK16
POWER AVAILABLE
MDF KSU MAIN PCB
I I
CONNECTION
2
T
, 3
/
KCOU
CO LINE 1
MDF
MOD JACK CO1
(BASE UNIT)
I
POWER FAIL
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