Cisco Systems 7401ASR manual Pin Description, Dte

Appendix A Specifications

Fast Ethernet/Ethernet RJ-45 Port Pinouts

Figure A-1 RJ-45 Port and Connector

1

12345678

1 57574

RJ-45 connector

Table A-8 RJ-45 Receptacle Pinouts

Pin1	Description
1	TxD+2
2	TxD–
3	RxD+3
6	RxD–

1.Any pin not referneced is not connected.

2.TxD = Transmit Data

3.RxD = Receive Data

Note With reference to the RJ-45 pinouts in Table A-8, proper common-mode line terminations should be used for the unused Category 5 UTP cable pairs 4/5 and 7/8. Common-mode termination reduces electromagnetic interference (EMI).

Use the pinouts shown in Figure A-2for straight-through and crossover twisted-pair cable connections for your RJ-45 interface cabling requirements.

Figure A-2 Fast Ethernet/Ethernet Pinouts—Straight-Through or Crossover Cable

	1			2
3	4		3	5
1 TxD+		1 RxD+	1 TxD+	1 TxD+
2 TxD–		2 RxD–	2 TxD–	2 TxD–
3 RxD+		3 TxD+	3 RxD+	3 RxD+
6 RxD–		6 TxD–	6 RxD–	6 RxD–

57607

		1	Straight-through cable pinout, Ethernet port to	4	Hub
			a hub or repeater
2			Crossover cable pinout, Ethernet port to a	5	DTE
			DTE
3			Ethernet port
			Cisco 7401ASR Installation and Configuration Guide
	OL-5419-01 B0					A-7