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Summary of Contents for Lantronix LTR8T
- Page 1 LTR-T Installation Guide...
- Page 2 Thank you for choosing the Lantronix LTR-T repeater. Like all Lantronix products, the LTR-T is designed and built to exacting standards. We strive to make all of our products easy to use and of the highest quality. That’s how we’re able to support them with a five-year warranty and free technical support.
- Page 3 Copyright © 1993, 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. Printed in the United States of America.
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Page 5: Table Of Contents
Factory Defaults ....................17 10BASE-T Wiring Conventions ................. 18 Hub Interconnection ................... 19 Maintenance Information ................... 19 Glossary....................20 Appendix A - Power Supply Cord ............23 Appendix B - Cabling ................25 Lantronix Problem Report Procedure ..............27 Warranty....................29... - Page 6 Figures and Tables Figures: Figure 1: LTR-T dimensions ................2 Figure 2a: A Simple Network Configuration ........... 6 Figure 2b: A Complex Network Configuration ..........6 Figure 3: LTR-T front and back panels ............7 Figure 4: Connecting the transceiver cable to the AUI port ......8 Figure 5: Hub Interconnect Configuration............
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Page 7: Overview
Each 10BASE-T segment can be connected to either a network node or to another 10BASE-T hub for further network distribution. In the discussions below, the term LTR-T will be used to refer to both the LTR8T and the LTR16T, which are considered functionally equivalent. -
Page 8: Site Preparation And Unpacking
Site Preparation and Unpacking Before installing the LTR-T, do the following to prepare your site: • Check space requirements • Confirm that the LTR-T will have the proper environmental conditions • Check the installation of other hardware components • Check the cable connections •... -
Page 9: Table 1: Ltr-T Power Requirements
Voltage 95-250 Vac 3-wire single phase, autoranging Frequency 47 to 63 Hz Operating current 0.5 Amp (maximum) Power 30 Watts Fuse (field replaceable) 2 Amp 250 Vac, time delay Table 1: LTR-T Power Requirements Fuse Under normal use, the fuse should not need to be replaced. If it does, ensure that the proper type of fuse is used. -
Page 10: Installation Of Other Hardware Components
Installation of Other Hardware Components Ensure that the 10BASE-T (UTP) cables you will be using have been tested and labeled. See the cable pinouts in Appendix C, if necessary. If you will be connecting the LTR-T to a Thinwire segment, you will need an LTX-2 or equivalent 10BASE2 transceiver to attach the segment to the LTR-T’s AUI port. -
Page 11: Installation
Installation Network Configuration Figure 2 shows two sample network configurations using the LTR-T. Figure 2a shows a simple network configuration using only 10BASE-T segments; Figure 2b shows a more complex configuration using Thickwire Ethernet and interconnected LTR-T units. In Figure 2b, the LTR-T on the left is directly connected from the AUI to the transceiver, while the LTR-T on the right is connected from the AUI to a Local Network Interconnect device. -
Page 12: Figure 2A: A Simple Network Configuration
Operation of this equipment in a residential area may cause unacceptable interference to radio and TV reception requiring the operator to take whatever steps necessary to correct the interference. Serial # CAUTION For continued protection against LTR8T risk of fire, replace only with ® same type and ratings of fuse geprüfte... -
Page 13: Cabling Instructions
IEC 950 Fabriqué aux Etats-Unis LISTED - 6J40 AUI and 10BaseT Status AC input Fuse LTR8T ---MODE--- STAT Figure 3: LTR-T Back and Front Panels Figure 3: LTR-T Front and Back Panels WARNING: During the installation procedure some segments of your network may be unstable. -
Page 14: Figure 4: Connecting The Transceiver Cable To The Aui Port
Connect each 10BASE-T cable to the LTR-T. Make sure the port number on the LTR-T matches the label on the cable, then insert one end of the cable into the connector. Connect the other end of the cable to the workstation, host, or network device. -
Page 15: Adding New Network Segments
5. Connect the power cord to the LTR-T. The LTR-T can accept power from either 110 Vac or 220 Vac outlets directly, therefore, there is no need to use a voltage adapter. Warning: To reduce the risk of electric shock, in countries using an IT power system or where protective earth ground connection is not made, the ground conductor of the power cable should be connected to earth ground. -
Page 16: Power-Up Sequence
Try cycling power to the hub and see if the indication persists. If so, contact your dealer or Lantronix. The diagnostic results will be shown on the upper right 9 LEDs - Table 3 explains the meaning of the LED colors. -
Page 17: Table 3: Power-Up Diagnostic Codes
Having failed power-up diagnostics, the LTR-T will disable all ports and continue to display the diagnostic code indefinitely. Lantronix or your dealer should be contacted. Table 3: Power-up Diagnostic Codes Upon successfully completing the power-up diagnostics, the LTR-T will begin normal operation in status mode as indicated by the following LED displays: 1. -
Page 18: Troubleshooting
Troubleshooting If your LTR-T unit does not power-up properly, try the following: Check the power cable. Verify that power is reaching the unit. The LTR-T can receive power from either 110 Vac or 220 Vac outlets without any modification to the hardware, however, you must make sure the unit is properly grounded. Check that the LEDs light when the POWER switch is turned on. -
Page 19: Normal Operation
Normal Operation During normal operation the LTR-T displays the status and activity of all its attached ports. The each port’s status is displayed as follows: STAT LED Explanation GREEN UTP ports The link is good and receive polarity is correct. the link test function and/or polarity correction is disabled. -
Page 20: Configuration
Configuration The LTR-T has several features, configurable via the front panel: Link test - Enabled on all UTP ports by default, the link test function continuously checks the ports to verify that a proper connection exists between each port and the device at the opposite end of the UTP cable. In order for the link test function to pass, the device at the opposite end of the UTP cable must support link test functionality. -
Page 21: Configuration Mode
Configuration Mode While in configuration mode the LEDs take on different meanings. The color of the PWR LED indicates which function is being enabled/disabled. The STAT LEDs indicate whether or not the particular function is enabled on each port, while the ACT LEDs indicate which ports are selected for modification. - Page 22 Link test mode is the first mode entered, and is indicated by the solid green PWR LED. In this mode the LTR-T can enable/disable the link test function on any combination of the UTP ports. The STAT LED above the lit ACT LED indicates whether or not the link test is enabled on the selected port.
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Page 23: Storing Configuration
Storing Configuration To store the current configuration of the LTR-T as the power-up default, press both MODE buttons simultaneously and hold them for approximately 3 seconds. The store operation can be performed while the LTR-T is in either status or configuration mode. If a store is performed while in configuration mode, the LTR-T automatically exits configuration mode and returns to status mode upon completing the operation. -
Page 24: 10Base-T Wiring Conventions
10BASE-T Wiring Conventions There are two standard RJ45 pin assignments used in connecting 10BASE-T equipment using unshielded twisted-pair (UTP) cable. They are referred to as an MDI (Medium- Dependent Interface) and MDI-X. The MDI designation refers to devices which transmit on RJ45 pins 1 and 2 and receive on pins 3 and 6. -
Page 25: Hub Interconnection
Hub Interconnection Ports 8 and 16 (LTR16T) are special in that they can be configured to simplify interconnection of multiple LTR-Ts. To connect one LTR-T to another LTR-T the MDI/MDI-X switch on the back of the unit can be used. See "10BASE-T Wiring Conventions,"... -
Page 26: Glossary
Glossary Attachment Unit Interface (AUI) Cable A 15-pin shielded, twisted pair cable used (optionally) to connect the LTR-T to a transceiver or LNI-type device. Branch See Segment. See Repeater. Local Network Interconnect A device that allows two or more devices access to the network medium via a single transceiver. - Page 27 normal data and collision signals. The LTR-T is an example of a repeater, and the physical medium that it uses is unshielded twisted-pair (UTP). Segment A length of coaxial or UTP cable. The LTR-T passes signals from each of its segments to all other attached segments.
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Page 29: Appendix A: Power Supply Cord
Appendix A: Power Supply Cord Cord type: 3 conductors 1.0 mm minimum conductor size (approx. 18 AWG) Rated for 250 Volts AC, 10 Amps Length ≤ 3.0 meters (10 feet) The cord should have a harmonized cable type number. (“Harmonized” refers to an internationally standardized cable description, and is prefixed by the letters HAR.) An example of a valid harmonized cord type is: HAR HO5VV-F 3G1.00... -
Page 31: Appendix B: Cabling
Appendix B: Cabling This appendix explains the different types of cable available to meet your networking needs -Thickwire, Thinwire, and unshielded twisted pair (UTP). Refer to the Glossary for an explanation of these and other terms used in this section. The LTR-T interfaces directly to UTP Ethernet. - Page 32 For most environments, it is acceptable to use standard 24 AWG unshielded twisted pair (UTP) telephone wire as your network medium. However, if the network is to be installed in a “noisy” environment (a location with high electromagnetic interference) it may be necessary to use a data-grade UTP cable instead.
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Page 33: Lantronix Problem Report Procedure
Lantronix Problem Report Procedure If you are experiencing problems with your Lantronix product, please contact Lantronix' Technical Service department. LANTRONIX 15353 Barranca Parkway Irvine, California 92718 714-453-3990 • FAX 714-453-3995 Direct Sales 1-800-422-7055 • Technical Support 1-800-422-7044 Internet email address: support@lantronix.com... - Page 34 Appendix B-28 LTR-T Installation Guide...
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Page 35: Warranty
If the product is not under warranty, Lantronix will contact the customer who then has the option of having the unit repaired on a fee basis or having the unit returned. -
Page 36: Declaration Of Conformity
Manufacturer’s Address: 15353 Barranca Parkway Irvine, CA 92718 USA declares, that the product: Product Name: Ethernet Repeater Model Number(s): LTR8T and LTR16T conforms to the following Standards: Safety: EN 60950:1988 + A1, A2 EMC: EN 50022:1988 class A EN 55082-1:1992...
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