Audio Authority HDP-11 user manual Terminating CAT 5E/6 Cables, Pairing Chart

3.1 TERMINATING CAT 5E/6 CABLES

Use standard EIA-568A or B pairing, assigning low twist density pairs to the four center pins, and high density pairs to outside pins. Correct pairing is vital, and should always be checked with a network cable tester. The correct pairing is straight through, pin-to-pin, as shown.

TWIST DENSITY AND WIRE PAIRING

RJ45

RJ-45

CONNECTORS

PINS FACING UP,

LATCH DOWN

RJ45

EIA-568B

RJ-45 Pin Assignments:

Pins 1-2 and 7-8 should be assigned to high density twists.

Pins 3-6 should be assigned to low density twists.

LOW

DENSITY

1 2 3 4 5 6 7 8

1381T END

LOW

DENSITY

1 2 3 4 5 6 7 8

1381R END (IDENTICAL)

Cat 5e/6 cable pairs have different twist densities (twist pitches). There are two pairs with high density twist and two pairs with low density. Pairs 1-2 and 7-8 should be assigned to high density twists. Failure to assign correct twist densities can result in image jitter. Twist densities can be seen by stripping off about four inches of insulation.

Colors vary by manufacturer, so once you identify the high density twist pairs, use the chart below to assign the colors to the correct RJ-45 pins.

PAIRING CHART	PIN WIRE COLOR	TWIST DENSITY
	1	HIGH
	2
	3	LOW
	4
	5	LOW
	6
	7	HIGH
	8

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