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Ethernet Network Cabling Guidelines
ii
Cisco 1750 Router Hardware Installation Guide
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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 1 Straight-Through Ethernet Cable (RJ-45-to-RJ-45) Pinouts
RJ-45 Pin
1
Signal Direction RJ-45 Pin
1TX+—>1
2TX–—>2
3RX+<—3
6RX–<—6
1. Pins 4, 5, 7, and 8 are not used for signaling but to reduce radiated cable emissions.
Table 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