AppendixB Cabling Specifications
Ethernet Network Cabling Guidelines
B-2
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
Ethernet Network Cabling Guidelines
Table B -2 describes guidelines for creating Ethernet networks. Numbers might
vary, depending on the manufacturer of the network equipment.
TableB-1 Straight-Through Ethernet Cable (RJ-45-to-RJ-45) Pinouts
RJ-45 Pin1
1. Pins 4, 5, 7, and 8 are not used for signaling but for reducing radiated cable
emissions.
Signal Direction RJ-45 Pin
1TX+—>1
2TX–—>2
3RX+<—3
6RX–<—6
TableB-2 Ethernet Cabling Guidelines
Specification 10BASE-T 100BASE-TX
Maximum segment
length
100 meters 100 meters
Maximum number of
segments per network
5•With Class I
repeaters: 1
•With Class II
repeaters: 2
Maximum hop count1
1. Hop count = routing metric used to measure the distance between a source and a
destination.
4•With Class I
repeaters: none
•With Class II
repeaters: 1
Maximum number of
nodes per segment
1024 1024
Cable type required Category 3, 4, or 5 Category 5