Nortel Networks 60-24T, 60-12T manual Cable Assignments, Table B-1 RJ-45 Pin Descriptions

Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs

Table B-1 describes the pin assignments.

Table B-1.	RJ-45 Pin Descriptions
Pin Number	Assignment (Station Ports	Assignment (Daisy-Chain Port,
	1 through 12 or 24)	other Devices)

1Input Receive Data +

2Input Receive Data -

3Output Transmit Data +

6	Output Transmit Data -
4, 5, 7, 8	Not used

Output Transmit Data + Output Transmit Data - Input Receive Data + Input Receive Data - Not used

Cable Assignments

You can use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable to connect to RJ-45 ports.

Use the following cable categories, depending on the type of Ethernet transmissions on your device.

•10 BASE-T - 100 Ohm Category 3, 4, 5 twisted pair

•100 BASE-TX - 100 Ohm Category 5 twisted pair

Figure B-2 shows schematics for straight-through and crossover twisted-pair cables.

	Straight-Through					Crossover
	(Hub)	(Adapter)			(Hub)		(Hub)
1	IRD+	1	OTD+	1	IRD+	1	IRD+
2	IRD-	2	OTD-	2	IRD-	2	IRD-
3	OTD+	3	IRD+	3	OTD+	3	OTD+
6	OTD-	6	IRD-	6	OTD-	6	OTD-
							9243EA

Figure B-2. Cable Schematics

B-2 206378-A