CHAPTER 1 Introduction
1.1 Product Introduction
Congratulations on your purchase of the LFH stackable 8-port or 16-
port Fast Ethernet Hub! The LFH8-S and LFH16-S are designed to give
you the ultimate in flexibility, ease-of-use, and reliability.
The LFH8-S and LFH16-S Stackable Fast Ethernet Hubs are 100BASE-
TX multiport Class II repeaters designed for use with networks using
Unshielded Twisted Pair (UTP) Category 5 cable or Shielded Twisted
Pair (STP) cable. The LFH hubs are simple to install, and feature
Link/Receive, Partition, and Utilization % LEDs for convenient moni-
toring of the status of the hub and of each port. The rear panel of each
LFH hub features two stacking ports, allowing up to six LFH stackable
hubs to be combined as a single repeater. For additional expansion, the
LFH8-S/ LFH16-S provides an uplink port that makes it easy to cascade
the hub to another Fast Ethernet hub or hub stack.
The LFH8-S/LFH16-S hubs can be placed on a table top or rack-
mounted, and provide the ideal solution for small to large 100BASE-TX
Fast Ethernet networks. The LFH hubs are designed to comply with the
IEEE 802.3u Fast Ethernet standard.
To insure network reliability, the LFH8-S and LFH16-S monitor each
port for signal quality and automatically disconnect stations transmit-
ting noise, reconnecting them when the problem is resolved. Data
packets that exceed the maximum legal length for IEEE802.3 Ethernet
packets are automatically truncated. This prevents a device from
blocking the network by transmitting a continuous data stream or
excessively long packet. The LFH hubs completely retime and restore
full-amplitude waveforms for each retransmitted packet. A full-length
preamble is also generated, insuring packet integrity across the
network.
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