Cisco CISCO1721 Instalační příručka stáhnout pdf (Strana 66)

Appendix B Cabling Specifications

Ethernet Network Cabling Guidelines

B-2

Cisco 1721 Router Hardware Installation Guide

78-13834-02

Ethernet Network Cabling Guidelines

Table B-2 describes some guidelines for creating Ethernet networks. Figures

might vary, depending on the manufacturer of the network equipment.

3RX+ <— 3

6RX– <— 6

1. Pins 4, 5, 7, and 8 are not used for signaling.

Table B-1 Ethernet Cable Pinouts (continued)

RJ-45

Signal Direction

RJ-45

Table B-2 Ethernet Cabling Guidelines

Specification 10BASE-T 100BASE-TX

Maximum segment

length

100 meters 100 meters

Maximum number of

segments per network

• With Class I

repeaters: 1

• With Class II

repeaters: 2

Maximum hop count

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 UTP

Category 3, 4, or 5

UTP Category 5 or STP

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Cisco CISCO1721 Instalační příručka Strana 66