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Lantronix LFH4-M manual

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Table of contents for the manual

  • Page 1

    LFH4-M/LFH8-M Mini Fast Hubs Installation Guide[...]

  • Page 2

    T able of Contents CHAPTER 1. Introduction 1.1 Product Intr oduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 CHAPTER 2. Using the LFH Hub 2.[...]

  • Page 3

    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 r eliability . The LFH4-M and LFH8-M Mini Fast Ethernet Hubs are 100BASE-TX multiport Class II repeaters for use with netwo[...]

  • Page 4

    1.2 Features ▼ The LFH4-M provides four 100BASE-TX ports and the LFH8-M provides eight 100BASE-TX ports for Fast Ethernet connectivity ▼ The LFH4-M/LFH8-M comply with the IEEE 802.3u Fast Ethernet standard ▼ Supports Category 5 Unshielded T wisted Pair (UTP) or Shielded T wisted Pair (STP) cable ▼ An Uplink port on the front panel enables t[...]

  • Page 5

    1.3 Product Specifications Standards IEEE 803.3u 100BASE-TX Ethernet Network Media 100BASE-TX Unshielded T wisted Pair cabling (Category 5 UTP) Max. Lengths 100 meter hub-to-station connection 5 meter hub-to-hub connection Connectors 8/16 RJ45 connectors, one crossover ÒUplinkÓ port LED indicators Power , Collision, Partition, Link/Activity Dimen[...]

  • Page 6

    5 Chapter 2 Using the LFH Hub 2.1 Packing Checklist Y our LFH package should contain the following: ✓ An LFH4-M or LFH8-M Mini Fast Hub ✓ Mounting brackets and screws ✓ External AC/DC power adapter (120V AC or 220V AC) ✓ Installation Guide If any of these items are missing, contact your dealer immediately . 2.2 Planning 100BASE-TX Networks [...]

  • Page 7

    6 Not only does 100BASE-TX have a differ ent data transmission scheme, it also has differ ent cabling requir ements. As previously noted, 100BASE-TX requir es data-grade (Category 5) UTP cable. Some installations have Category 5 cabling but do not have wall outlets and wiring closet punch-down blocks that meet Category 5 requir e- ments. 100BASE-TX[...]

  • Page 8

    Figure 2-2 LFH4-M Fr ont Panel Figure 2-3 LFH8-M Fr ont Panel The LFH Mini Fast Ethernet Hubs were designed for easy Òplug and playÓ installation. Before you connect the LFH to other devices, ther e are several issues you should keep in mind: ▼ When connecting the LFH to a workstation using unshielded twisted pair cable, you must make sure that[...]

  • Page 9

    2.4 Mounting Y our LFH4-M or LFH8-M hub is delivered with a mounting bracket. The LFH hub can be mounted to the wall or to the surface of a counter- top by using the bracket and hanging the LFH hub on the wall using the keyholes provided on the bottom of the hub. If mounting the LFH hub is not your prefer ence, you may choose to place the LFH hub o[...]

  • Page 10

    2.5 Connecting the LFH Hub Use the following procedur es to connect 100BASE-TX network devices to the hub: NOTE: If the Uplink Port is being utilized on the LFH hub, the adja- cent Port may not be used. Conversely , if that Port is being utilized, the Uplink Port may not be connected. The following table describes the two cable types: Make sure tha[...]

  • Page 11

    10 Chapter 3 LED Indicators Figure 3-1 and Figur e 3-2 show the LED indicators which indicate the link status of each of the ports, whether the LFH hub is receiving power , and the presence of network activity and collisions on the network. Figure 3-1 LFH4-M Fr ont Panel LED Indicators Figure 3-2 LFH8-M Fr ont Panel LED Indicators 4 321 PWR COL P A[...]

  • Page 12

    11 3.1 Power LED The green LED on the fr ont panel labeled PWR is used to indicate that the LFH hub is receiving power and is turned on. If the LED is of f, check the following to isolate the problem: ▼ Make sure the power cor d is properly connected to the power outlet and is properly inserted into the power connection on the LFH hub ▼ Determi[...]

  • Page 13

    3.3 Link/Activity LEDs The Link/Activity LEDs on the front panel ar e associated with indi- vidual ports, indicating whether a device is detected on the other end and whether or not the port has been automatically partitioned off. The LFH hub monitors each port on the hub to determine whether or not there is a device on the other end. If the cable [...]

  • Page 14

    Limited W arranty The LFH4-M and LFH8-M come with 5-year limited warranties. T o obtain LantronixÕs full warranty statement or if you experience pr ob- lems with your unit, check our website (www .lantronix.com) or call Lantronix for assistance. Copyright © 1998, Lantronix. All rights reserved. No part of the contents of this guide may be transmi[...]

  • Page 15

    W ARNING! This device complies with part 15 of the FCC rules. Operation is subject to the following conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interfer ence received, including that which may cause undesired operation. Operation of this equipment in a residential ar ea is likely to cause inte[...]

  • Page 16

    Declaration of Conformity (according to ISO/IEC Guide 22 and EN 45014) Manufacturer Õs Name: Lantronix Manufacturer Õs Addr ess: 15353 Barranca Parkway Irvine, CA 92618 USA declares, that the pr oduct: Product Name: Mini Fast Hubs Model Number: LFH4-M, LFH8-M conforms to the following standards: EMC: EN55022(1988)/CISPR 22(1985) Class B EN60555-2[...]

  • Page 17

    16 NOTES[...]

  • Page 18

    15353 Barranca Parkway , Irvine, CA 92618 949-453-3990 ▼ Fax: 949-453-3995 ▼ Sales: 800-422-7055 ▼ Support: 800-422-7044 P ART NO. 900-142 Rev .A[...]