Ethernet network cabling guidelines, Table b-1 – Cisco 1751 User Manual
Page 60
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Appendix B Cabling Specifications
Ethernet Network Cabling Guidelines
B-2
Cisco 1751 Router Hardware Installation Guide
78-11258-04
Ethernet Network Cabling Guidelines
describes guidelines for creating Ethernet networks. Figures 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 to reduce 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
10BaseT
100BaseTX
Maximum
segment length
100 meters
100 meters
Maximum number
of segments per
network
5
•
With Class I
repeaters:
1
•
With Class II
repeaters:
2
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