Cisco 1760 Hardware Installation Guide - Page 78
Ethernet Network Cabling Guidelines
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Ethernet Network Cabling Guidelines Appendix B Cabling Specifications Table B-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+
Appendix B
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.
Table B-1
Straight-Through Ethernet Cable (RJ-45-to-RJ-45) Pinouts
RJ-45 Pin
1
1.
Pins 4, 5, 7, and 8 are not used for signaling but for reducing radiated cable
emissions.
Signal
Direction
RJ-45 Pin
1
TX+
—>
1
2
TX–
—>
2
3
RX+
<—
3
6
RX–
<—
6
Table B-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 count
1
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