Accton Technology 12mi SNMP, 12i manual Appendix B Pin Assignments, RJ-45 Port

Appendix B: Pin Assignments

RJ-45 Port

Figure B-1

RJ-45 Connector (on the Hub Side)

RJ-45 station ports (MDI-X) can be attached to any devices which use a standard LAN interface (e.g., a workstation, server or router). RJ-45 daisy-chain ports (MDI) can be cascaded to a station port on similar networking devices (e.g., a switch). Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100W Category 3, 4 or 5 cable for 10 Mbps connections or 100W Category 5 cable for 100 Mbps connections. Also be sure that the length of any twisted-pair connection does not exceed 100 meters.

Pin	Assignment for MDI-X
	Station Ports 1 ~ 12

1Input Receive Data +

2Input Receive Data -

3Output Transmit Data +

6Output Transmit Data -

4,5,7,8 Not Used

Table B.1 RJ-45 Pin Assignments

Assignment for

Cascade Port 12MDI

Output Transmit Data +

Output Transmit Data -

Input Receive Data +

Input Receive Data -

Not Used

Schematics for both straight and crossover twisted-pair cable are shown below.

	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-

Pin Assignments B-1