LFH4-M/LFH8-M Mini Fast Hubs Installation Guide
Table of Contents CHAPTER 1. Introduction 1.1 Product Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 CHAPTER 2. Using the LFH Hub 2.1 2.2 2.3 2.4 2.5 Packing Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Planning 100BASE-TX Networks . . . . . . . . . . . . . .
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.
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.
1.3 Product Specifications Standards IEEE 803.3u 100BASE-TX Ethernet Network Media 100BASE-TX Unshielded Twisted Pair cabling (Category 5 UTP) Max.
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.
Not only does 100BASE-TX have a different data transmission scheme, it also has different cabling requirements. As previously noted, 100BASE-TX requires 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 requirements. 100BASE-TX requires that all wiring and accessories meet EIA/TIA 568B specifications for proper operation.
Figure 2-2 LFH4-M Front Panel L O C PW R LFH4-M 4 3 2 1 PARTITION LINK/ACT PORT NO. 4 3 2 1 Uplink Figure 2-3 LFH8-M Front Panel L O C PW R LFH4-M 4 3 2 1 PARTITION LINK/ACT PORT NO. 4 3 2 1 Uplink The LFH Mini Fast Ethernet Hubs were designed for easy Òplug and playÓ installation.
2.4 Mounting Your 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 countertop 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 preference, you may choose to place the LFH hub on a table or wiring closet shelf. Use the four selfadhesive rubber feet, which are provided with the hub for cushioning purposes.
2.5 Connecting the LFH Hub Use the following procedures to connect 100BASE-TX network devices to the hub: LFH4-M LFH8-M Ports 1-4 Ports 1-8 Uplink Port PC, Workstation S C Server S C Hub, Switch port C S Hub, Switch uplink port S C S = Straight Cable C = Crossover cable NOTE: If the Uplink Port is being utilized on the LFH hub, the adjacent Port may not be used. Conversely, if that Port is being utilized, the Uplink Port may not be connected.
Chapter 3 LED Indicators Figure 3-1 and Figure 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 Front Panel LED Indicators L O C PW R LFH4-M 4 3 2 1 Partition Link/Activity PARTITION LINK/ACT PORT NO. Figure 3-2 LFH8-M Front Panel LED Indicators L O C PW R LFH4-M 4 3 2 1 Partition Link/Activity PARTITION LINK/ACT PORT NO.
3.1 Power LED The green LED on the front panel labeled PWR is used to indicate that the LFH hub is receiving power and is turned on. If the LED is off, check the following to isolate the problem: ▼ Make sure the power cord is properly connected to the power outlet and is properly inserted into the power connection on the LFH hub ▼ Determine whether or not the outlet is functional by plugging another device into the receptacle 3.
3.3 Link/Activity LEDs The Link/Activity LEDs on the front panel are associated with individual 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.
Limited Warranty The LFH4-M and LFH8-M come with 5-year limited warranties. To obtain LantronixÕs full warranty statement or if you experience problems 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 transmitted or reproduced in any form or by any means without the written permission of Lantronix.
WARNING! 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 interference received, including that which may cause undesired operation. Operation of this equipment in a residential area is likely to cause interference in which case the user, at his or her own expense, will be required to take whatever measures may be required to correct the interference.
Declaration of Conformity (according to ISO/IEC Guide 22 and EN 45014) ManufacturerÕs Name: Lantronix ManufacturerÕs Address: 15353 Barranca Parkway Irvine, CA 92618 USA declares, that the product: 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(1987) Class A prEN55024-2(1990)/IE801-2(1991) 4KV CD, 8KV AD prEN55024-3(1991)/IE801-3(1984) 3V V/m prEN55024-4(1992)/IE801-4(1988) 1KV - (power line) 0.
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15353 Barranca Parkway, Irvine, CA 92618 949-453-3990 ▼ Fax: 949-453-3995 ▼ Sales: 800-422-7055 ▼ Support: 800-422-7044 PART NO. 900-142 Rev.
