Cisco Systems UBR7100 manual Identifying an RJ-45 Straight-Through Cable, RJ-45 Pin Description

Appendix C Cable Specifications

Fast Ethernet Port Cables and Pinouts

Figure C-3 RJ-45 Crossover Cable Identification

Pin 1

Pin 2

Pin 3

Pin 6

62741

Identifying an RJ-45 Straight-Through Cable

You can identify a straight-through cable by comparing the two modular ends of the cable. Hold the cables side-by-side with the tab at the back. The straight-through cable’s wires are in the same sequence at both ends of the cable.

Figure C-4 RJ-45 Straight-Through Cable Identification

Pin 1

Pin 1

62740

Note If your cable was purchased from Cisco Systems, pin 1 is white.

Table C-3lists the pinouts for the two Fast Ethernet ports.

Table C-3 10BASE-T RJ-45 Connector Pinouts

		RJ-45 Pin	Description	RJ-45 Pin	Description
1			Tx+	3	Rx+
2			Tx–	6	Rx–
		Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
	OL-5916-01					C-5