Cisco Systems CISCO1750 Ethernet Network Cabling Guidelines, RJ-45 Pin Signal Direction, Tx+ Rx+

Ethernet Network Cabling Guidelines

Table 1	Straight-Through Ethernet Cable (RJ-45-to-RJ-45) Pinouts
RJ-45 Pin1		Signal	Direction	RJ-45 Pin
1		TX+	—>	1
2		TX–	—>	2
3		RX+	<—	3
6		RX–	<—	6

1. Pins 4, 5, 7, and 8 are not used for signaling but to reduce radiated cable emissions.

Ethernet Network Cabling Guidelines

Table 2 describes some guidelines for creating Ethernet networks. Figures might vary, depending on the manufacturer of the network equipment.

Table 2	Ethernet Cabling Guidelines
Specification		10BaseT	100BaseTX
Maximum		100 meters	100 meters
segment length
Maximum number		5	•	With Class I
of segments per				repeaters:
network				1
			•	With Class II
				repeaters:
				2

Cisco 1750 Router Hardware Installation Guide

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