Lantronix LFH4-M Manuel d'utilisateur télécharger pdf (Page 6)

Chapter 2 Using the LFH Hub

2.1 Packing Checklist

Your LFH package should contain the following:

✓ An LFH4-M or LFH8-M Mini Fast Hub

✓ Mounting brackets and screws

✓ External AC/DC power adapter (120VAC or 220VAC)

✓ Installation Guide

If any of these items are missing, contact your dealer immediately.

2.2 Planning 100BASE-TX Networks

100BASE-TX networks need to be planned out slightly differently from

10BASE-T networks, because new hubs and new wiring configurations

are necessary. (10BASE-T hubs are incapable of sending or receiving data

at 100Mbps, so a 100BASE-TX network requires a 100BASE-TX hub.)

100BASE-TX supports a maximum length of 100 meters from a network

station to a hub. The total network diameter (the maximum cable

distance between any two stations on the network) is 205 meters for

100BASE-TX, as opposed to 500 meters for 10Mbps Ethernet. Because

100BASE-TX sends signals ten times faster than 10BASE-T, the collision

window (the time during which the network can detect a collision

between packets) is reduced to one-tenth the duration of the 10BASE-T

collision window, making the maximum network diameter smaller.

In a repeater environment, 100BASE-TX only allows a single layer of

cascaded hubs.

Switching hubs, such as LantronixÕs LSW8FA, may increase the

network diameter for 100BASE-TX networks by buffering data packets.

Each port can be connected to a separate LAN segment, each with a

maximum diameter of 205 meters, thereby increasing the overall

100BASE-TX network diameter.

1 2 3 4 5 6 7 8 9 10 11 ... 17 18

Pas de commentaire

Lantronix LFH4-M Manuel d'utilisateur Page 6