Black Box LH1500A-R3 Installation And User Manual
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Black Box LH1500A-R3 Installation And User Manual

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© Copyright 2005.
Black Box Corporation. All rights reserved.
1000 PARK DRIVE • LAWRENCE, PA 15055-1018 • 724-746-5500 • FAX 724-746-0746
Black Box LH1500A
BLACK BOX
(724) 746-5500
Crossover
Media Converter
RX
100 Mb/s
TX
LINK
PWR
LINK
BLACK BOX
(724) 746-5500
Crossover
Media Converter
RX
100 Mb/s
TX
LINK
PWR
LINK
Fast Ethernet Media Converters
July 2005
LH1500A-R3
LH1500AE-R3
LH1501A-R3
LH1501AE-R3

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  • Page 1 100 Mb/s LINK LINK BLACK BOX (724) 746-5500 Crossover Media Converter 100 Mb/s LINK LINK Fast Ethernet Media Converters © Copyright 2005. Black Box Corporation. All rights reserved. 1000 PARK DRIVE • LAWRENCE, PA 15055-1018 • 724-746-5500 • FAX 724-746-0746...
  • Page 2 Important: Black Box LH1500A Media Converters contain no user serviceable parts. Attempted service by unauthorized personnel shall render any and all warranties null and void. If problems are experienced with a Black Box LH1500A Media Converter, consult Section 5, Troubleshooting, of this User Guide.
  • Page 3 Black Box LH1500A Media Converters Installation and User Guide (08/05) Contacting Black Box Please use the mailing address and phone and fax numbers listed below: Black Box Corporation 1000 Park Dr. Pittsburgh, PA 15055 Phone: (724) 746-5500 Fax: (724) 746-0746...
  • Page 4 Black Box LH1500A Media Converters Installation and User Guide (08/05) FCC STATEMENT FEDERAL COMMUNICATIONS COMMISSION & CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the communication.
  • Page 5 Black Box LH1500A Media Converters Installation and User Guide (08/05) This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications.
  • Page 6 Black Box LH1500A Media Converters Installation and User Guide (08/05) Todas las instrucciones de operación y uso deben ser seguidas. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc..
  • Page 7 Black Box LH1500A Media Converters Installation and User Guide (08/05) Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde salen del aparato.

  • Page 8: Table Of Contents

    Black Box LH1500A Media Converters Installation and User Guide (08/05) TABLE OF CONTENTS Page 1.0 SPECIFICATIONS..................1 1.1. Technical Specifications *................1 1.2. Model numbers and product descriptions *..........5 2.0 INTRODUCTION ..................7 2.1 Inspecting the Package and Product ............... 7 2.2 Product Description * ..................
  • Page 9 3.3.3 Power Budget Calculations for Fiber media * ........37 4.0 OPERATION................... 39 4.1 Power requirements, power supply types * ..........39 4.2 Front Panel LEDs - Black Box LH1500A’s ..........40 4.3 Up-Link Switch on TX port ................. 40 5.0 TROUBLESHOOTING................42 5.1 Before Calling for Assistance...............

  • Page 10: Specifications

    Half- or Full-Duplex, auto-sensing 800ns (80 bit-times) Path Delay Value (PDV) for conversion delay Network Standards: Fast Ethernet IEEE 802.3u: 100BASE-TX, 100BASE-FX (Black Box LH1500A Media Converters are physical layer standard Fast Ethernet products, and operate independently of all software.)
  • Page 11 412 m (1350 ft) 100BASE-FX Fiber optic, full duplex: (single-mode) 15.0 km (49,215 ft) Note: Black Box LH1500A Media Converters DO NOT support full length shared Fast Ethernet segments. See Section 3.2 of this manual for media lengths and shared segment distance calculations.
  • Page 12 Black Box LH1500A Media Converters Installation and User Guide (08/05) Operating Environment: Ambient Temperature: 32ºF to 122ºF (0ºC to 50ºC) Storage Temperature: -20ºC to 60ºC Ambient Relative Humidity: 10% to 95% (non-condensing) Power Supply (External): Power Input: 95-125 vac at 60Hz for “LH1500A-SC-R2, LH1500A-ST- R2, LH1501A-R2”...
  • Page 13 Black Box LH1500A Media Converters Installation and User Guide (08/05) Fiber Port, SC-type (snap-in): Fiber optic multi-mode, 100BASE-FX Fiber Port, ST-type (twist-lock): Fiber optic multi-mode, 100BASE-FX Single-mode: Fiber Port, SC-type (snap-in): Fiber optic single-mode, 100BASE-FX Packaging: Enclosure: High strength sheet metal.
  • Page 14 Black Box LH1500A Media Converters Installation and User Guide (08/05) LED Indicators for the Black Box LH1500A’s and LH1501A’s: TX port FX port Description Indicates unit is receiving DC power. LINK Fiber Steady ON when proper link is established at both ends of the media segment, i.e., when both end’s connections are properly...
  • Page 15 Black Box LH1500A Media Converters Installation and User Guide (08/05) 1.2 Model Number Description LH1500A-SC-R3 Twisted pair to mm fiber SC, ext. 115 vac, 60Hz power supply LH1500AE-SC-R3 Twisted pair to mm fiber SC, ext. 230 vac, 50Hz power supply LH1500A-ST-R3 Twisted pair to mm fiber ST, ext.

  • Page 16: Introduction

    Black Box LH1500A Media Converters Installation and User Guide (08/05) INTRODUCTION This section describes the Black Box LH1500A’s and LH1501A’s Media Converters, including appearance, features and possible applications. Inspecting the Package and Product Examine the shipping container for obvious damage prior to installing this product;...
  • Page 17 Set of two (2) metal mounting clips with screws Velcro® Tape section, approximately 3 inches in length Remove the Black Box LH1500 Media Converter from the shipping container. Be sure to keep the shipping container should you need to ship the unit at a later date.

  • Page 18: Product Description

    Ethernet cabling configuration as network requirements change. Black Box LH1500A Media Converters are designed for quick and easy installation even in very tight spaces. Media cables are easily attached. Black Box LH1500A Media Converters feature an up-link switch on the TX port to eliminate the need for a special cross-over cable when connecting the TX port to a hub or concentrator.
  • Page 19 Frequency Interference (RFI) and Electromagnetic Interference (EMI), avoiding interference with other nearby electronic devices. The Black Box LH1500A units comply with the IEEE 802.3u (100BASE-TX and 100BASE-FX) specification for 100 Mb/sec traffic via shielded (STP) or unshielded twisted pair (UTP) segments.
  • Page 20 Black Box LH1500A Media Converters Installation and User Guide (08/05) The Black Box LH1500A-ST is equipped with one fiber-ST and one RJ-45 connector for connection to 100BASE-FX compliant networks segments. Twisted Pair Fiber Multimode (100BASE-TX) (100BASE-FX) Black Box LH1500A Media Converter...
  • Page 21 Black Box LH1500 Media Converters Installation and User Guide (08/05) The Black Box LH1500A-SC is equipped with one fiber-SC and one RJ-45 connector for connection to 100BASE-FX compliant networks segments. Fiber Twisted Pair Black Box LH1500A (100BASE-TX) (100BASE-FX) Media Converter...

  • Page 22: Features And Benefits

    2Km for the multi-mode model, and up to 15Km for single-mode model. Low PDV for Maximum Cable Lengths in Shared Segments Black Box LH1500A Media Converters add signal timing delays of only 80 Bit Times in a shared half-duplex segment, less than a Class II Fast Ethernet Repeater (90 to 95 BT typical), and can be used to attach fiber cable to TX ports with minimum distance loss in the collision domain.
  • Page 23 LEDs to provide network LINK status on each port separately, and to indicate power on the unit. Highly Reliable and Dependable Black Box LH1500A Media Converters are based on a robust design and packaged in a metal enclosures to ensure high reliability and durability.

  • Page 24: Applications

    Alternatively, a server with a full-duplex NIC needs to be connected via fiber to a 100Mb switching hub with RJ-45 ports. In these and similar situations, the Black Box LH1500 conveniently converts the twisted pair cable to fiber, allowing use of any available RJ-45 Fast Ethernet switched port with a new or existing fiber cable.
  • Page 25 LINK LINK LINK Two Black Box LH1500s provide connectivity for switch ed 100Mb hubs via fiber. Where shared Fast Ethernet segments are used, such as with Fast Ethernet hubs with RJ-45 ports, it may be desirable to connect one or more servers or users via fiber...
  • Page 26 3.2.2) for proper operation when the LH1500A is used in shared half-duplex applications. 100 BASE-TX 100 BASE-FX LH1500A wiring segment wiring segment Black Box Media Converter UP LINK Mb/s LINK LINK Black Box LH1500A provides connectivity to server s or users via fiber.

  • Page 27: Installation

    Black Box LH1500A Media Converters Installation and User Guide (08/05) INSTALLATION This section describes the installation of the Black Box LH1500A Media Converters, including location, segment distance calculation and media connection. Locating the Media Converter Unit The compact and lightweight design of the Black Box LH1500A Media Converter allows it to be easily installed in most any location.

  • Page 28: Segment Distances, Full-Duplex

    Black Box LH1500A Media Converters Installation and User Guide (08/05) Make sure the unit is installed in a location that is easily accessible to an AC power outlet or power strip, and where convection cooling is not inhibited. Calculating Segment Distances The media distance considerations are quite different for full-duplex and for half-duplex (standard Fast Ethernet) installations.
  • Page 29 The Black Box LH1500A, with full-duplex operation as a standard feature, can be used in these applications. When installing the Black Box LH1500A in a full-duplex segment, it is important to consider the combined overall segment length of both of the attached media types.
  • Page 30 Media Converter divided by the Standard Maximum Media Distance for that media type, x 100% Where Y = The segment length on the other side of the Black Box LH1500A Media Converter divided by the Standard Maximum Media Distance for that media cabling type, x 100%...
  • Page 31 Black Box LH1500A Media Converters Installation and User Guide (08/05) Segment Y Segment X 10m (33ft) Black Box 1500m (4920ft) Media Converter 100 Mb/s UP LINK Fiber Multimode Twisted Pair (100BASE-FX) LINK (100BASE-TX) Connectivity between 100BASE-TX and 100BASE-FX Ethernet Media.
  • Page 32 100%. In another instance, a Black Box Media Converter is used to connect a single mode fiber (100BASE-FX) with a twisted pair (100BASE-T) segment. In this example, the length of fiber Segment X is 8500m (27,880 ft).

  • Page 33: Segment Distances, Half-Duplex

    Ethernet protocol provides for this situation and requires that the sender wait and try again. When installing the Black Box LH1500A in a half-duplex segment, it is important to consider the collision domain of the segment, including the LH1500A itself, repeaters...
  • Page 34 A Black Box LH1500A has a PDV of about eighty Bit Times (80 BT), and this value must be included in the overall collision domain diameter PDV calculations as applicable for the placement of the LH1500 in the topology of the collision domain.
  • Page 35 Black Box LH1500A Media Converters Installation and User Guide (08/05) Collision Domain Diameter must be less than 512 BT (Bit Times). Bit Times are related to media type as shown in Table 3.2.2a. Table 3.2.2a: Worst case round-trip delay for Fast Ethernet media*...
  • Page 36 Black Box LH1500A Media Converters Installation and User Guide (08/05) Table 3.2.2b: Worst case round-trip delay for Fast Ethernet device components* Component Round-trip delay in Bit Times (BT) 2 TX DTEs 2 FX DTEs 1 FX and 1 TX DTE...
  • Page 37 Black Box LH1500A Media Converters Installation and User Guide (08/05) PDV = (sum of cabling delays) + (sum of repeater & media converter delays) + (DTE pair delays) + (safety margin) PDV is the Path Delay Value of the worst case path. For the network to adhere to IEEE 802.3u standard, this value must be less than 512 BT.
  • Page 38 As a rule-of-thumb, a Class II Repeater has a PDV of about 90 to 95 BTs, and twisted- pair or fiber media has a PDV of about 1 BT per meter of length. The Black Box LH1500A has a PDV of 80 BT. Therefore, in shared Fast Ethernet applications, the LH1500A uses about 80 meters of equivalent cable distance to convert from TX media to fiber FX media, i.e., it consumes almost as much of the available PDV as a Class II...
  • Page 39 As a sample calculation, consider the question of what fiber cable distance (connected by a pair of Black Box LH1500A on each end) can be obtained that will interconnect two 100Mb hubs where the twisted pair cables to the user nodes are 10 meters in length.
  • Page 40 TP cable without the LH1500A. Consider a more typical use of Black Box LH1500A in a shared Fast Ethernet segment. A stack of Fast Ethernet hubs comprises the only repeater in the collision domain, and the users and servers in the local workgroup are each connected via Category 5 twisted pair cable, a maximum of 30 meters (100 ft.) in length.
  • Page 41 Black Box LH1500A Media Converters Installation and User Guide (08/05) The solution is : 512 = total available Bit Times in a collision domain diameter, minus 100 BT for two DTEs on each end leaves 412 BTs, minus 90 BT for one Class II stackable repeater leaves 322 BTs,...

  • Page 42: Connecting Fast Ethernet Media

    Connecting Twisted Pair (RJ-45, Unshielded or Shielded) The following procedure describes how to connect a 100BASE-TX twisted pair segment to the RJ-45 port on the Black Box LH1500A Media Converters. The procedure is the same for both unshielded and shielded twisted pair segments.
  • Page 43 Before connecting the fiber optic cable, remove the protective dust caps from the tips of the connectors on the Black Box LH1500A. Save these dust caps for future use. Wipe clean the ends of the dual connectors with a soft cloth or lint-free lens tissue dampened in alcohol.
  • Page 44 Black Box LH1500A Media Converters Installation and User Guide (08/05) Note: One strand of the duplex fiber optic cable is coded using color bands at regular intervals; you must use the color-coded strand on the associated ports at each end of the fiber optic segment.

  • Page 45: Power Budget Calculations For Fiber Media

    Black Box LH1500A Media Converters Installation and User Guide (08/05) 3.4.1 Power Budget Calculations for Fiber Media Receiver Sensitivity and Transmitter Power are the parameters necessary to compute the power budget. To calculate the power budget of different fiber media...
  • Page 46 Black Box LH1500A Media Converters Installation and User Guide (08/05) Fiber Speed, Std. km Wave- Cable X’mitr R’cvr Worst Worst* typical typical* Port length Size Output Sens. OPB, distance OPB, distance Mode Std. µm Module (hdx) Km, fdx Km, fdx...

  • Page 47: 4.0 Operation

    LEDs. Power Requirements, Power Supply Types Black Box LH1500A Media Converters require 5 watts of power and are designed to be used with an external power supply. The external power supply unit supplied is one of two types; one version AC input power auto-ranging 115 vac at 60Hz for “LH1500A-SC- R2, LH1500A-ST-R2, LH1501A-R2”...

  • Page 48: Up-Link Switch On Tx Port

    Up-Link Switch (On TX port) Black Box LH1500A Media Converters are equipped with an up-link slide switch to accommodate repeater-to-converter connections without a special cross-over cable. When set to the UP position (=), the Black Box LH1500A Media Converter is wired...
  • Page 49 When set to the DOWN position (X), the Media Converter is wired with cross-over functionality for direct up-link to a network hub or concentrator. Up-link up-link Switch user device End view - Black Box L H1500A...

  • Page 50: Troubleshooting

    Black Box LH1500A Media Converters Installation and User Guide (08/05) TROUBLESHOOTING If problems should develop during installation or operation, follow the suggestions below prior to calling Technical Support for help. If you are unsure of any procedure described in this chapter, or if the LH1500A Media Converter is not operating as expected, do not attempt to repair or alter the unit.
  • Page 51 Converter, replace the problem device with a known good device. Verify whether or not the problem is corrected. If it is not, go to step 5. If the problem is corrected, the Ethernet Media Converter and its associated cables will function properly. If the problem still exists, contact Black Box.

  • Page 52: 5.2 When Calling For Assistance

    The components involved in the problem; d. Any particular application that, when used, appears to create the problem; 2. An accurate list of BLACK BOX product model(s)involved, with serial number(s). Include the date(s) that you purchased the products from BLACK BOX.

  • Page 53: Shipping And Packaging Information

    5.3 Return Material Authorization (RMA) Procedure Shipping and Packaging Information Should you need to ship the unit back to Black Box Corporation, please follow these instructions: 1. Package the unit carefully. It is recommended that you use the original container if available.
  • Page 54 Black Box LH1500A Media Converters Installation and User Guide (08/05) 3. Black Box Corporation is not responsible for your return shipping charges. 4. Ship the package to: Black Box Corporation 1000 Park Drive Lawrence, PA 15055 Phone: (724) 746-5500 Fax:...

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