Netgear EN524, EN516 Quick Start Manual
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.com
M-EN516NA-1
September 2000
© 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.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to
make changes to the products described in this document without notice.
NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit
layout(s) described herein.
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy. If it is not installed and used in accordance with the instruction manual, it may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which
case users will be required to take whatever measures may be necessary to correct the interference at their own expense.
EN 55 022 Declaration of Conformance
This is to certify that the Bay Networks NETGEAR Model EN516 Ethernet Hub is shielded against the generation of
radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is
declared by the application of EN 55 022 Class B (CISPR 22).
Compliance is dependent upon the use of shielded data cables.
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das NETGEAR Model EN516 Ethernet Hub gemäß der im BMPT-AmtsblVfg 243/1991
und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B.
Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der
Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt
gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Die Erfüllung der zutreffenden Vorschriften hängt von der Benutzung geschirmter Kabel ab. Der Benutzer ist für den
Erwerb der entsprechenden Kabel verantwortlich.
ii
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.
Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and
has been granted the right to test the series for compliance with the regulations.
Compliance with the applicable regulations is dependent upon the use of shielded cables. It is the responsibility of the
user to procure the appropriate cables.
Voluntary Control Council for Interference (VCCI) Statement
This equipment is in the first category (information equipment to be used in commercial and/or industrial areas) and
conforms to the standards set by the Voluntary Control Council for Interference by Data Processing Equipment and
Electronic Office Machines that are aimed at preventing radio interference in commercial and/or industrial areas.
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio interference may be
caused to equipment such as radios and TV receivers.
Customer Support
For assistance with installing and configuring your NETGEAR system or with post-installation questions or problems,
contact your point of purchase representative.
To contact customer support or to purchase additional copies of this document and publications for other NETGEAR
products, you can contact NETGEAR at the following numbers:
Phone
Australia: 1800-787-638
Austria: 00800-06384327
(00800-0-NETGEAR)
Denmark: 808-82179
Canada: 1-888-NETGEAR
Finland: 0800-111-036
France: 0800-77-17-53
Germany: 00800-06384327
(00800-0-NETGEAR)
Hong Kong: 001-800-1233-4566
Japan: 0120-66-5402
Korea: 00308-11-0319
Netherlands: 0800-023-0981
New Zealand: 00800-1233-4566
Norway: 800-12041
Singapore: 001-800-1233-4566
Sweden: 0200-298-298
Switzerland: 00800-0638-4327
(00800-0-NETGEAR)
United Kingdom: 020-7216-0014
United States: 1-888-NETGEAR
All Other Countries: +1 801-236-8499
World Wide W eb
NETGEAR maintains a World Wide Web Home Page that you can access at the universal resource locator (URL) http://
www.NETGEAR.com. A direct connection to the Internet and a Web browser such as Mosaic or Netscape
are required.
iii
iv
Contents
Chapter 1
Introduction
Features .........................................................................................................................1-1
Chapter 2
Physical Description
Front Panel .....................................................................................................................2-1
LED Indicators ..........................................................................................................2-2
RJ-45 Ports ..............................................................................................................2-3
Normal/Uplink Push Button ......................................................................................2-3
Rear Panel ......................................................................................................................2-4
Chapter 3
Installation
Preparing the Site ...........................................................................................................3-1
Package Contents ..........................................................................................................3-1
Required Tools ................................................................................................................3-2
Installing the Hub ............................................................................................................3-2
Installing the Hub on a Flat Surface .........................................................................3-3
Installing the Hub in a Rack .....................................................................................3-3
Connecting the Hub ........................................................................................................3-4
Connecting to the RJ-45 Ports .................................................................................3-4
Connecting to the BNC Port .....................................................................................3-7
Connecting to the AUI Port .......................................................................................3-9
Connecting to Other NETGEAR Products .............................................................3-10
Completing and Verifying the Installation ......................................................................3-11
Contents v
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 ......................................4-2
Partition LED for the RJ-45 Ports .............................................................................4-2
Partition LED for the BNC Port .................................................................................4-2
Partition LED for the AUI Port ..................................................................................4-3
Installation ......................................................................................................................4-3
Cabling ...........................................................................................................................4-3
Network Interface Cards .................................................................................................4-4
Configuration ..................................................................................................................4-4
Hub Integrity ...................................................................................................................4-4
Appendix A
Technical Specifications
General Specifications ................................................................................................... A-1
Appendix B
Cabling Specifications
Cable Specifications ...................................................................................................... B-1
Twisted Pair Cables ....................................................................................................... B-2
50 Ω Coaxial Cable ........................................................................................................ B-3
AUI Cable ...................................................................................................................... B-3
Appendix C Connector Pin Assignments
RJ-45 Connector ........................................................................................................... C-1
AUI Connector ............................................................................................................... C-2
BNC Connector ............................................................................................................. C-3
BNC T-Connector and 50 Ω Terminator ......................................................................... C-4
Index
vi Contents
Figures
Figure 2-1. Front panel of the Model EN516 hub .......................................................2-1
Figure 2-2. 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. Connecting a workstation to an RJ-45 port on the Model EN516 hub .....3-5
Figure 3-3. Cascading multiple hubs in a hierarchical star through the RJ-45 ports ..3-6
Figure 3-4. Cascading multiple hubs daisy-chain style through the RJ-45 ports .......3-7
Figure 3-5. Cascading hubs through the BNC port ....................................................3-8
Figure 3-6. Cascading hubs through the AUI port ......................................................3-9
Figure 3-7. Connecting multiple NETGEAR products ..............................................3-10
Figure B-1. Straight-through twisted pair cable ......................................................... B-2
Figure B-2. Crossover twisted pair cable ................................................................... B-2
Figure C-1. RJ-45 connector ......................................................................................C-1
Figure C-2. AUI connector pin assignments .............................................................. C-2
Figure C-3. BNC connector ........................................................................................C-3
Figure C-4. 50 Ω terminator and BNC T-connector .................................................... C-4
Figures vii
viii Figures
Tables
Table 2-1. LED descriptions ......................................................................................2-2
Table B-1. Electrical requirements of Category 3, 4, and 5 cables .......................... B-1
Table B-2. Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U
coaxial cable ........................................................................................... B-3
Table B-3. Specifications of AUI cable ..................................................................... B-3
Table C-1. RJ-45 connector pin assignments ...........................................................C-2
Table C-2. AUI connector pin assignments .............................................................. C-3
Tables ix
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.
This guide is intended for individuals who have the following background and experience:
• Working knowledge of Ethernet
• Familiarity with 10BASE-T specifications
Features
Featuring a compact design, the Model EN516 hub offers all the features of a standard equipment
rack-mount hub at a significantly lower cost.
These features include:
• Sixteen IEEE 802.3-compliant 10BASE-T ports, providing effective information exchange,
resource sharing, and a client/server or peer-to-peer applications solution with simple
unshielded twisted pair (UTP) wiring
• Attachment unit interface (AUI) or coaxial BNC backbone support for connecting to an
existing Ethernet segment or external transceiver, or for network expansion
• Normal/Uplink push button for simplifying network extension and connecting with other hubs
Introduction 1-1
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 excessive collisions or is jabbering
• Automatic polarity detection for recognizing and correcting incorrect polarity on the receive
pair
• Ability to expand the network size by connecting multiple hubs together using twisted pair or
coaxial cabling
• Compact design, enabling easy tabletop or rack-mounting installation
• Limited five-year warranty on the unit and one-year warranty on the power supply
1-2 Introduction
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).
1 2 3
MODEL
PORT
16
10BASE-T
Ethernet Hub
BNCRxAUI
Power
Collision Partition Partition
Rx
1
Link/Rx Partition Link/Rx Partition
9
EN516
8
Normal/Uplink
16
7432
Key:
1 = LEDs (Power, BNC Rx, AUI Rx, Collision, BNC Partition, and AUI Partition)
2 = RJ-45 ports with Link/Rx and Partition LEDs on each port
3 = Normal/Uplink push button
Figure 2-1. Front panel of the Model EN516 hub
Physical Description 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 status for all ports in the hub
Table 2-1 describes each LED on the front panel of the hub.
Table 2-1. LED descriptions
Label Color Activity Description
Power Green On Power is supplied to the hub.
BNC Rx Green Blinking There is incoming data on the BNC port.
AUI Rx Green Blinking There is incoming data on the AUI port.
Collision Yellow Blinking There is data collision on the network.
Note that occasional collisions are normal.
BNC Partition Yellow On The BNC port is being partitioned because
of excessive collisions, or when the BNC
port is not connected.
AUI Partition Yellow On The AUI port is being partitioned because of
excessive collisions.
Link/Rx (located on
top left corner of each
RJ-45 port)
Partition (located on
top right corner of each
RJ-45 port)
Green On
Blinking
Yellow On The port is being partitioned because of
The link between this port and the other
connecting port is good.
There is incoming data on the port.
excessive collisions.
2-2 Physical Description
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