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Chapter 2 Installing the LFH Hub
2.1 Packing Checklist
Your LFH package should contain the following:
✓
An LFH8-S or LFH16-S Fast Stackable Hub
✓
One AC Power Cable
✓
One 25-pin cable for stacking LFH hubs
✓
Mounting brackets and screws
✓
Four self-adhesive standoffs
✓
Rackmount brackets and screws
✓
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.