Toshiba DK 16, DK8 manual Table B Electronic Telephone Cables, Table D

FAULT FINDING SECTION 100-816-500 MARCH 1993

TABLE B

(ELECTRONIC TELEPHONE CABLES)

STATION CABLE CONTINUITY CHECK USING VOLTMETER

	FROM			TO		VOLTAGE 3
Pair	Wire	Color	Pair	Wire	Color
1	T	Green	2	T	Black	24 3
1	R	Red	2	T	Black	24 3
1	T	Green	2	R	Yellow	24 3
1	R	Red	2	R	Yellow	24 3
1	T	Green	1	R	Red	0
2	T	Black	2	R	Yellow	0
3	T	White	3	R	Blue	0
3	T	White	1	R	Red	0
3	R	Blue	1	R	Red	0
3	T	White	1	T	Green	0
3	R	Blue	1	T	Green	0
3	T	White	2	T	Black	0
3	R	Blue	2	T	Black	0
3	T	White	2	R	Yellow	0
3	R	Blue	2	R	Yellow	0

				TABLE C
	(ELECTRONIC TELEPHONE CABLES)
	STATION CABLE CONTINUITY
		CHECK USING OHMMETER
	FROM				TO		Resistance
Pair	Wire		Color	Pair	Wire	Color
1	T		Green	2	T	Black	open
1	R		Red	2	T	Black	open
1	T		Green	2	R	Yellow	open
1	R		Red	2	R	Yellow	open
1	T		Green	1	R	Red	40 ohms 1
2	T		Black	2	R	Yellow	40 ohms 1
3	T		White	3	R	Blue	40 ohms 1
3	T		White	1	R	Red	open
3	R		Blue	1	R	Red	open
3	T		White	1	T	Green	open
3	R		Blue	1	T	Green	open
3	T		White	2	T	Black	open
3	R		Blue	2	T	Black	open
3	T		White	2	R	Yellow	open

				TABLE D
	(DIGITAL TELEPHONE CABLES)
	STATION CABLE CONTINUITY
		CHECK USING VOLTMETER
	FROM				TO		VOLTAGE
Pair	Wire		Color	Pair	Wire	Color
1	T		Green	2	T	Black		0
1	R		Red	2	T	Black		24 3
1	T		Green	2	R	Yellow		24 3
1	R		Red	2	R	Yellow		0
1	T		Green	1	R	Red		24 3
2	T		Black	2	R	Yellow		24 3

				TABLE E
	(DIGITAL TELEPHONE CABLES)
	STATION CABLE CONTINUITY
		CHECK USING OHMMETER
	FROM				TO		Resistance
Pair	Wire		Color	Pair	Wire	Color
1	T		Green	2	T	Black	open
1	R		Red	2	T	Black	open
1	T		Green	2	R	Yellow	open
1	R		Red	2	R	Yellow	open
1	T		Green	1	R	Red	40 ohms1
2	T		Black	2	R	Yellow	40 ohms1

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.

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