INSTALLATION
Infinite
816 Key Telephone System
PROCESSOR
OR
f STATION WIRING
f 6-CONDUCTOR
POWER FAILURE
;
TRANSFER
STATION
,
; MODULAR
JACK
I
KSU
I
I
FROM RJ21 X
I
I
I
-
NOTE1
I
i
RED
PFr3
i
i
i
i
I
I
I-
I
PFT2
!
I
1
I
I
-
I
I
np
-
i
NOTE 1: Contacts are shown in power failure mode.
Ngure 500-6 Power Failure Transfer Circuit
500-12
Issue 1, January 1992