Installation Guide for the Model EN516 Ethernet Hub NETGEAR NETGEAR Inc. 4500 Great America Parkway Santa Clara, CA 95054 USA Phone: 1-888-NETGEAR E-mail: support@NETGEAR.com www.NETGEAR.
© 2000 by NETGEAR, Inc. All rights reserved. Trademarks NETGEAR™ is a trademark of NETGEAR, Inc. Windows® is a registered trademark of Microsoft Corporation. Other brand and product names are trademarks or registered trademarks of their respective holders. Information is subject to change without notice. All rights reserved.
Certificate of the Manufacturer/Importer It is hereby certified that the NETGEAR Model EN516 Ethernet Hub has been suppressed in accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations may, however, be subject to certain restrictions. Please refer to the notes in the operating instructions.
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Contents Chapter 1 Introduction Features .........................................................................................................................1-1 Chapter 2 Physical Description Front Panel .....................................................................................................................2-1 LED Indicators ..........................................................................................................2-2 RJ-45 Ports ............................................
Chapter 4 Troubleshooting Front Panel LEDs ...........................................................................................................4-1 Collision LED ............................................................................................................4-1 Link/Rx LED for the RJ-45 Ports ..............................................................................4-2 AUI Rx LED and BNC Rx LED for the AUI and BNC Ports ......................................
Figures Figure 2-1. Figure 2-2. Front panel of the Model EN516 hub .......................................................2-1 Rear panel of the Model EN516 hub ........................................................2-4 Figure 3-1. Installing mounting brackets to the hub and to a rack ..............................3-4 Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 3-7. Connecting a workstation to an RJ-45 port on the Model EN516 hub .....
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Tables Table 2-1. LED descriptions ......................................................................................2-2 Table B-1. Table B-2. Table B-3. Electrical requirements of Category 3, 4, and 5 cables .......................... B-1 Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable ........................................................................................... B-3 Specifications of AUI cable ...................................................................
Chapter 1 Introduction Congratulations on your purchase of the NETGEAR™ Model EN516 Ethernet Hub. The Model EN516 hub is part of the NETGEAR 500 Series product family, which delivers standards-based, plug-and-play networking solutions for small businesses, home offices, and low-density workgroups of larger companies. This guide describes how to install and use the hub and includes physical configuration guidelines for stacking hubs, connecting Ethernet stations, and making network connections.
Installation Guide for the Model EN516 Ethernet Hub • Built-in 100-240 V switching power supply, eliminating the need for bulky wall transformers • Thirty-eight front panel light emitting diode (LED) indicators, providing real-time status of the individual ports and overall hub status • Plug-and-play with no software to configure • Hub functions such as packet retiming, collision detection, preamble regeneration, and fragment extension • Automatic partitioning and reconnection of a port that has e
Chapter 2 Physical Description This chapter describes the hardware features of the Model EN516 hub. The discussion of the physical components of the hub is divided into two sections, “Front Panel” and “Rear Panel.” Use the key at the bottom of each illustration to identify the associated component. Front Panel The front panel contains LEDs, 16 RJ-45 10BASE-T port connectors, and a Normal/Uplink push button (Figure 2-1).
Installation Guide for the Model EN516 Ethernet Hub LED Indicators There are six LEDs on the front panel of the hub and two on each port connector that allow you to identify: • Status of the hub AC power supply • Operational status of the hub • Collision occurrence on an Ethernet segment indicating activity level • Partitioning of a port as a result of excessive collision occurrence • Data utilization of the Ethernet segment in a standalone hub or a stack of hubs • Link and receive activity stat
Installation Guide for the Model EN516 Ethernet Hub RJ-45 Ports The front panel of the Model EN516 hub provides 16 RJ-45 10BASE-T ports. Two LEDs, the Link/Rx LED and the Partition LED, are positioned at the top corners of each RJ-45 connector. Both LEDs are described in Table 2-1.
Installation Guide for the Model EN516 Ethernet Hub Rear Panel The rear panel of the Model EN516 hub (refer to Figure 2-2) provides two ports, the AUI port and the BNC port. You can use the AUI port with the appropriate transceiver to connect the hub to a backbone network using thin coaxial cable, thick coaxial cable, fiber optic cable, or 10BASE-T wiring. You can use the BNC port to connect to a backbone network or other PCs using thin coaxial cable. The rear panel also includes an AC power receptacle.
Chapter 3 Installation This chapter provides information on: • Preparing the site • Package contents • Required tools • Installing the hub • Connecting the hub • Completing and verifying the installation Preparing the Site Before you begin installing the Model EN516 hub, prepare the installation site. Make sure the operating environment meets the physical requirements of the hub. The ambient temperature must be between 0°C and 40°C. The maximum relative humidity must not exceed 90%.
Installation Guide for the Model EN516 Ethernet Hub • AC power cord • Rack mount kit • Four rubber pads for installation on a flat surface • One BNC T-connector • One BNC terminator • Warranty and Owner Registration Card Caution: Use the appropriate power cord as required by your national electrical codes and ordinances. Call your dealer if there are any wrong, missing, or damaged parts. Keep the carton, including the original packing materials.
Installation Guide for the Model EN516 Ethernet Hub Installing the Hub on a Flat Surface To install the hub on a flat surface such as a tabletop or shelf, follow these steps: 1. Install self-adhesive pads on the bottom of the hub. Peel off the protective backing from the rubber pads and apply one at each marked location on the bottom of the hub. 2. Set the hub on a tabletop or shelf so that it has at least 2 inches (5 cm) of space on all sides. Restricted air flow could cause overheating. 3.
Installation Guide for the Model EN516 Ethernet Hub . 1 Power Data Collisi on Link RX 9 Link 8 RX Norma l/Uplin k 16 7171 Figure 3-1. Installing mounting brackets to the hub and to a rack Connecting the Hub This section discusses connecting to the hub, cascading to multiple hubs, and connecting to other NETGEAR products.
Installation Guide for the Model EN516 Ethernet Hub Port 16 is switchable between Normal (MDI-X) and Uplink (MDI) positions and should be configured according to the following guidelines: • Set the Normal/Uplink push button to the Normal position and use a straight-through cable if the remote end of the cable is connected to an MDI-wired device such as a PC.
Installation Guide for the Model EN516 Ethernet Hub Cascading refers to connecting hubs together to increase the number of ports, or the number of users supported on the network. The RJ-45, BNC, or AUI ports can be used to cascade hubs together. Figure 3-3 illustrates multiple hubs cascaded in a hierarchical star.
Installation Guide for the Model EN516 Ethernet Hub Figure 3-4 illustrates multiple hubs cascaded in a daisy-chain style. 1 Model EN516 hub 2 Model EN516 hub 3 Model EN516 hub 000029EA Key: 1 = Model EN516 hub with Normal/Uplink push button set to Normal position 2 and 3 = Model EN516 hub with Normal/Uplink push button set to Uplink position Figure 3-4. Cascading multiple hubs daisy-chain style through the RJ-45 ports Note: Each twisted pair cable between two hubs is counted as one network segment.
Installation Guide for the Model EN516 Ethernet Hub 3. Connect the coaxial cable from another device to the remaining end of the self-locking BNC T-connector. If there are no more devices to be connected, terminate the connection with the 50 Ω terminator that is provided with the product. 4. Proceed to “Completing and Verifying the Installation” on page 3-11. Figure 3-5 illustrates three hubs cascaded through the BNC connector.
Installation Guide for the Model EN516 Ethernet Hub Connecting to the AUI Port The AUI port at the rear panel of the Model EN516 hub is normally used for connecting a thick coaxial segment. When using the AUI port, refer to Figure 3-6 and follow these steps: Connect the AUI port on the hub to an external coaxial transceiver through an AUI transceiver cable. 1.
Installation Guide for the Model EN516 Ethernet Hub Note: Ethernet specifications limit segments to 100 stations and 1,640 feet (500 m) in length, and specify that the AUI cable between the hub and the transceiver is limited to 164 feet (50 m). Connecting to Other NETGEAR Products You can extend your network by connecting to an Ethernet switch, such as the NETGEAR Model SW507 Ethernet Switch.
Installation Guide for the Model EN516 Ethernet Hub Completing and Verifying the Installation To complete the installation, connect the power cord first to the power entry receptacle on the hub rear panel and then to the power outlet on the wall. When power has been applied to the hub, the following conditions should exist: • Green Power LED on the front panel is on. • Yellow BNC Partition LED is on if the BNC port is not connected. • Green Link/Rx LED on each connected port is on.
Chapter 4 Troubleshooting This chapter provides information about troubleshooting the Model EN516 hub. Front Panel LEDs The Model EN516 hub provides 38 front panel LEDs for monitoring individual ports and hub status. The power LED indicates when power is supplied to the hub. The following sections describe the LEDs that are used for monitoring the Model EN516 hub. Collision LED The yellow Collision LED indicator blinks when there is data collision on the network.
Installation Guide for the Model EN516 Ethernet Hub • Defective connectors are being used. For further information on pin assignment and cable specifications, refer to Appendix B, “Cabling Specifications,” and Appendix C, “Connector Pin Assignments.” Link/Rx LED for the RJ-45 Ports The green Link/Rx LED on each RJ-45 port turns on when a link is established successfully between the hub and a PC or other device. It is off when there is no data link and/or the cable is not connected.
Installation Guide for the Model EN516 Ethernet Hub • Disconnected point somewhere along the coaxial cable length • Segment that is not terminated with a 50 Ω terminator on both ends Check all connectors along the cable length. If the segment is not terminated, terminate both ends with 50 Ω terminators.
Installation Guide for the Model EN516 Ethernet Hub Network Interface Cards Make sure the network interface cards installed in the workstations are in working condition. Configuration If problems occur after altering the network configuration, restore the original connections and determine the problem by implementing the new changes, one procedure at a time. Ensure that cable distances, repeater limits, and other physical aspects of the installation do not exceed the recommendations.
Appendix A Technical Specifications This appendix provides technical specifications for the NETGEAR Model EN516 Ethernet Hub. General Specifications Network Protocol and Standards Compatibility IEEE 802.3 10BASE-T, 10BASE-2, 10BASE5 Ethernet IEEE 802.3 CSMA/CD Data Rate 10 Mbps, Manchester encoded Interface 16 10BASE-T ports (RJ-45) 1 BNC 10BASE-2 port 1 AUI port (15 pin D-type) Power Adapter 100-240V, 50/60 Hz (auto selection) Electrical Specifications Power Consumption: 0.
Installation Guide for the Model EN516 Ethernet Hub Environmental Specifications Operating temperature: 0° C to 40° C (32° F to 104° F) Operating humidity: 90% maximum relative humidity, noncondensing Electromagnetic Emissions CE mark, commercial FCC Part 15 Class A EN 55 022 (CISPR 22), Class B VCCI Class 1 ITE Electromagnetic Susceptibility CE mark, commercial Electrostatic discharge (ESD): Radiated electromagnetic field: Electrical fast transient/burst: Electrical surge: IEC 801-2, Level 2/3/4 IEC 80
Appendix B Cabling Specifications This appendix provides specifications for cables used with the NETGEAR Model EN516 Ethernet Hub. Cable Specifications For 10 Mbps connections, Category 3, 4, or 5 cables can be used. NETGEAR highly recommends using Category 5 cable to avoid unnecessary expense or confusion if you upgrade to Fast Ethernet. Table B-1 lists the electrical requirements of Category 3, 4, and 5 cables. Table B-1.
Installation Guide for the Model EN516 Ethernet Hub Twisted Pair Cables For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Most repeaters and switch ports are media-dependent interfaces with crossover ports, referred to as MDI-X or Normal ports.
Installation Guide for the Model EN516 Ethernet Hub 50 Ω Coaxial Cable The 50 Ω coaxial cable, the BNC T-connector, and the 50 Ω terminator, allow a user to construct a 10BASE-2 network. Table B-2 lists the specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable. Table B-2. Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable Characteristic impedance Attenuation (185 m cable) Transfer impedance DC loop resistance 50 +/-2 Ω <8.5 db @ 10 MHz <6.
Appendix C Connector Pin Assignments This appendix provides information on the RJ-45, AUI, and BNC connectors that are used for the NETGEAR Model EN516 Ethernet Hub. RJ-45 Connector The RJ-45 connector is used to connect workstations, hubs, and switches through unshielded twisted pair cable. The RJ-45 connector accepts four-pair Category 3 or Category 5 UTP cable. Only two pairs are used for 10BASE-T wiring. Figure C-1 illustrates the RJ-45 connector. 1 8 7177 Figure C-1.
Installation Guide for the Model EN516 Ethernet Hub Table C-1 lists the pin assignments for the RJ-45 connector. Table C-1.
Installation Guide for the Model EN516 Ethernet Hub Table C-2 lists the AUI connector pin assignments. Table C-2. AUI connector pin assignments Pin Signal 1, 4, 11, 14, 15 Ground 2 CI-A 3 DO-A 5 DI-A 6 + 12V DC return 7, 8 Not used 9 CI-B 10 DO-B 12 DI-B 13 + 12V DC (500 mA maximum) BNC Connector The BNC connector for the Model EN516 hub supports 10 Mbps data transmission and connects the hub to other devices. Figure C-3 illustrates the parts of the BNC connector.
Installation Guide for the Model EN516 Ethernet Hub BNC T-Connector and 50 Ω Terminator The BNC port on the Model EN516 hub, with the BNC T-connector and the 50 Ω terminator, is used for connecting to a thin coaxial segment. Figure C-4 illustrates the BNC T-connector and 50 Ω terminator. For information on connecting to the BNC port, refer to Chapter 3, “Installation,” and Appendix B, “Cabling Specifications.” 50 OHM 7178 Figure C-4.
Index Numerics 10BASE2 coaxial cable specifications (table) B-3 A attachment unit interface.
Installation Guide for the Model EN516 Ethernet Hub connector AUI pin assignments (table) C-2 BNC C-3 BNC-T C-4 RJ-45 pin assignments (table) C-1 crossover twisted pair cable B-2 customer support iii D daisy-chain cascade 3-7 L LEDs AUI Partition 2-2, 4-3 AUI Rx 2-2, 4-2 BNC Partition 2-2, 3-11, 4-2 BNC Rx 2-2, 4-2 Collision 2-2, 4-1 description (table) 2-2 Power 2-2, 3-11, 4-1 RJ-45 Link/Rx 2-2, 3-11, 4-2 RJ-45 Partition 2-2 troubleshooting 4-1 F FCC statement ii features 1-1 front panel 2-1 H hierarch
Installation Guide for the Model EN516 Ethernet Hub P T package contents 3-1 ports See also AUI See also BNC See also RJ-45 AUI 2-4 BNC 2-4 cascading 3-4 to 3-9 connecting 3-4 to 3-9 RJ-45 2-3 using transceivers to connect AUI 3-9 Power LED 2-2, 3-11, 4-1 technical specifications A-1 technical support iii troubleshooting cable 4-3 configuration 4-4 installation 4-3, 4-4 LEDs 4-1 network interface cards 4-4 R W rear panel 2-4 RG 58 A/U coaxial cable specifications (table) B-3 RG 58 C/U coaxial cable B
