Cisco 1751 - Manual (Page 60)

Appendix B Cabling Specifications
Ethernet Network Cabling Guidelines
B-2
Cisco 1751 Router Hardware Installation Guide
78-11258-04
Ethernet Network Cabling Guidelines
Table B-2 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