Toshiba Strata DK 16 Installation And Maintenance Manual page 236

FAULT FINDING
SECTION 100-816-500
MARCH 1993
TABLE B
(ELECTRONIC TELEPHONE CABLES)
STATION CABLE CONTINUITY
CHECK USING VOLTMETER
FROM
Pair Wire Color Pair
1 T Green 2
1 R Red 2
1 T Green 2
1 R Red 2
1 T Green 1
2 T Black 2
3 T White 3
3 T White 1
3 R Blue 1
3 T White 1
3 R Blue 1
3 T White 2
3 R Blue 2
3 T White 2
3 R Blue 2
TABLE D
(DIGITAL TELEPHONE CABLES)
STATION CABLE CONTINUITY
CHECK USING VOLTMETER
FROM
Pair Wire Color Pair
1 T Green 2
1 R Red 2
1 T Green 2
1 R Red 2
1 T Green 1
2 T Black 2
NOTES:
1. This is the maximum allowable reading for all Digital and Electronic telephone cable runs except if connecting an HDSS
console to Circuits 7 and 8 of a PEKU—then the maximum cable restriction is 20 ohms, not 40 ohms.
2. The green-red, black-yellow and white-blue measurements should be within 10% of each other.
3. Nominal voltage—within the limits of 26.3 ~ 27.8 VDC while under AC power, polarity depending on voltmeter lead
placements.
TO
VOLTAGE
Wire Color
3
T Black 24
3
T Black 24
3
R Yellow 24
3
R Yellow 24
R Red 0
R Yellow 0
R Blue 0
R Red 0
R Red 0
T Green 0
T Green 0
T Black 0
T Black 0
R Yellow 0
R Yellow 0
TO
VOLTAGE
Wire Color
T Black 0
3
T Black 24
3
R Yellow 24
R Yellow 0
3
R Red 24
3
R Yellow 24
(ELECTRONIC TELEPHONE CABLES)
STATION CABLE CONTINUITY
CHECK USING OHMMETER
FROM
3
Pair Wire Color Pair
1 T Green
1 R Red
1 T Green
1 R Red
1 T Green
2 T Black
3 T White
3 T White
3 R Blue
3 T White
3 R Blue
3 T White
3 R Blue
3 T White
(DIGITAL TELEPHONE CABLES)
STATION CABLE CONTINUITY
CHECK USING OHMMETER
FROM
Pair Wire Color Pair
1 T Green
1 R Red
1 T Green
1 R Red
1 T Green
2 T Black
-6-
TABLE C
TO
Resistance
Wire Color
2 T Black open
2 T Black open
2 R Yellow open
2 R Yellow open
1 R Red 40 ohms
2 R Yellow 40 ohms
3 R Blue 40 ohms
1 R Red open
1 R Red open
1 T Green open
1 T Green open
2 T Black open
2 T Black open
2 R Yellow open
TABLE E
TO
Resistance
Wire Color
2 T Black open
2 T Black open
2 R Yellow open
2 R Yellow open
1 R Red 40 ohms
2 R Yellow 40 ohms
1
1
1
1
1