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CHAPTER 1 Introduction
1.1 Product Introduction
Congratulations on your purchase of the LFH 4-port or 8-port Mini Fast
Ethernet Hub! The LFH4-M and LFH8-M are designed to give you the
ultimate in flexibility, ease-of-use, and reliability.
The LFH4-M and LFH8-M Mini Fast Ethernet Hubs are 100BASE-TX
multiport Class II repeaters 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 Link/Activity, Partition,
and Collision LEDs provide convenient monitoring of the status of the
hub and of each port. For additional expansion, the hub offers an
Uplink port that makes it easy to cascade the hub to another Fast
Ethernet hub.
The LFH4-M/LFR8-M hubs can be placed on a tabletop or wall-
mounted, and provide the ideal solution for small to medium
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 LFH4-M and LFH8-M 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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