Black Box LE2750A Manual
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Black Box LE2750A Manual

Black Box LE2750A Manual

Networking hub 8-port, 10base-t
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LE2750A
Networking Hub
8-Port, 10BASE-T
CUSTOMER
Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500)
SUPPORT
FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
INFORMATION
Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com

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Summary of Contents for Black Box LE2750A

  • Page 1 Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500) SUPPORT FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mailing address: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
  • Page 3 FCC AND IC RFI STATEMENTS FEDERAL COMMUNICATIONS COMMISSION and INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS Class B Digital Device. This equipment has been tested and found to comply with the limits for a Class B computing device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 4 NETWORKING HUB NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
  • Page 5 NOM STATEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. 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 6 NETWORKING HUB TRADEMARKS is a registered trademark of Underwriters Laboratories Incorporated. ® Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.

  • Page 7: Table Of Contents

    5.2 Calling Black Box ........

  • Page 8: Specifications

    NETWORKING HUB 1. Specifications Compliance: FCC Class B, IC Class, VDE Class B, UL listed ® Standard: IEEE 802.3 Ethernet v. 1.0/2.0 LAN Interface: RJ-45 ports for Category 3 or better twisted-pair cable Data Rate: 10 Mbps Partitioning: Automatic after 32 consecutive collisions Reconnection: Occurs after 512 bits of error-free transmission Maximum Segment Length: UTP (unshielded 10BASE-T): 100 m (328 ft.) Indicators: (17) Front-mounted recessed LEDs: (1) Power, (8) Link/TX, and...

  • Page 9: Introduction

    CHAPTER 2: Introduction 2. Introduction 2.1 Overview The Networking Hub installs easily for use in a home, office, or lab environment, requiring no special rack cabinets or wiring-closet apparatus. This compact, standard physical-layer Ethernet hub operates independently of all software. Simple and inexpensive to use, the Hub is ideal for networking a multi-system home or office using 10BASE-T twisted-pair cabling.

  • Page 10: Features And Benefits

    NETWORKING HUB The front panel has Link/TX and RX LEDs for each RJ-45 port, numbered for the corresponding ports (see Figure 2-1), and one LED for AC power. Observing the operation and status of the ports is easy. Figure 2-1. Front panel. The included external wallmount power supply uses AC input power of 120 VAC/60 Hz.

  • Page 11: Applications

    • High-quality construction: A rugged metal enclosure and compliance with rigid Class B emission standards make the hub suitable for commercial and home offices. 2.3 Applications Networking Hub (LE2750A) Printer Server Router Figure 2-3. Using the Networking Hub as a standalone Ethernet local area network.

  • Page 12: Installation

    NETWORKING HUB 3. Installation 3.1 Before You Install: Inspect the Complete Package Inspect the contents of the package for any signs of damage, and make sure that you received these items. If anything is missing or damaged, please return the package to its place of purchase.

  • Page 13: Connecting Twisted-Pair Segments To The Front-Panel Ports

    10-Mbps Ethernet standards, you shouldn’t place more than four 10BASE-T Ethernet hubs or repeaters in any path between two users on the same Local Area Network (LAN). Networking Hub Networking Hub (LE2750A) (LE2750A) Crossover cable Figure 3-1. Cascading Networking Hubs.

  • Page 14: Operation

    NETWORKING HUB 4. Operation This chapter describes the Network Hub’s LEDs and operating features. The Hub is fully compliant with the Ethernet Version 2/IEEE 802.3 Repeater Specification for CSMA/CD 10-Mbps operation and will function accordingly. 4.1 LEDs • Power On (PWR) LED: Lights green to show functional DC power. •...

  • Page 15: Troubleshooting

    If problems develop during the installation or operation of your Networking Hub, this chapter should help to locate, identify, and correct such problems. Please follow the suggestions listed in Section 5.1. If nothing helps, contact Black Box (see Section 5.2).
  • Page 16 NETWORKING HUB • The components involved in the problem. • Any particular application that, when used, appears to create the problem or make it worse. If you cannot solve the problem over the phone, return the Networking Hub to the place of purchase.
  • Page 17 2/02 © Copyright 2002. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

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