D-Link DSS-24+ User's Guide download pdf (Page 18)

DSS-24 10/100 Auto Negotiation Switch User’s Guide

Network Connections

This chapter covers the following:

• Cable Specifications

• Ports

• Connecting the DSS-24 to other devices

This section deals with making cables and connecting the DSS-24 to other

devices. It is extremely important that cables have the correct pin arrangement

and that the proper cables be used when connecting to servers, switches, hubs,

workstations and other devices.

Cable Specifications

Use the following guidelines when handling cables:

• Do not stretch or bend cables.

• Do not put copper cables near sources of electromagnetic

interference.

• Do not create trip hazards by laying cables in aisles or walkways.

• Secure cables to the floor when routing in aisles or walkways.

Do not use telephone cable. Telephone cable does not support Ethernet or Fast

Ethernet.

Copper Cable

In order for Ethernet or Fast Ethernet to work the wires must be arranged

correctly inside the RJ-45 connector. The most common problem on Ethernet or

Fast Ethernet networks is the cable. If you migrate from Ethernet to Fast Ethernet,

make sure the cables are pinned out properly.

There are two types of cables: straight through and crossover. Category 3, 4, and

5 UTP/ STP cable has eight wires inside the sheath. The wires form four pairs.

Straight through cable has the same pin out, inside the RJ-45 connector, at both

ends. Crossover cable has a different pin arrangement at each end. Fast Ethernet

does not tolerate incorrect pin arrangements. You must use the correct pin

arrangement in order for the DSS-24 to work properly. See Figure 8 for an

example of straight through and crossover cable.

The type of cable you use depends on the speed of your network. A network

running at 10 Mbps can use lower grade cable than a network running at 100

Mbps. Table 1: Cable Specifications shows the cable requirements for Ethernet

and Fast Ethernet networks.

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D-Link DSS-24+ User's Guide Page 18