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 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 Class B (CISPR 22). Compliance is dependent upon the use of shielded data cables.
Besttigung des Herstellers/Importeurs
Es wird hiermit besttigt, da das NETGEAR Model EN516 Ethernet Hub gem der im BMPT-AmtsblVfg 243/1991 und Vfg 46/1992 aufgefhrten Bestimmungen entstrt ist. Das vorschriftsmige Betreiben einiger Gerte (z.B. Testsender) kann jedoch gewissen Beschrnkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung. Das Bundesamt fr Zulassungen in der Telekommunikation wurde davon unterrichtet, da dieses Gert auf den Markt gebracht wurde und es ist berechtigt, die Serie auf die Erfllung der Vorschriften hin zu berprfen. Die Erfllung der zutreffenden Vorschriften hngt von der Benutzung geschirmter Kabel ab. Der Benutzer ist fr den Erwerb der entsprechenden Kabel verantwortlich.
Certicate of the Manufacturer/Importer
It is hereby certied 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 Ofce for Telecommunications Approvals has been notied 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

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 Conguration....4-4 Hub Integrity....4-4 Appendix A Technical Specications General Specications.... A-1 Appendix B Cabling Specications Cable Specications.... B-1 Twisted Pair Cables... B-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 Terminator... C-4 Index

Figures

Figure 2-1. Figure 2-2. Figure 3-1. Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 3-7. Figure B-1. Figure B-2. Figure C-1. Figure C-2. Figure C-3. Figure C-4.
Front panel of the Model EN516 hub..2-1 Rear panel of the Model EN516 hub...2-4 Installing mounting brackets to the hub and to a rack..3-4 Connecting a workstation to an RJ-45 port on the Model EN516 hub..3-5 Cascading multiple hubs in a hierarchical star through the RJ-45 ports.3-6 Cascading multiple hubs daisy-chain style through the RJ-45 ports.3-7 Cascading hubs through the BNC port..3-8 Cascading hubs through the AUI port..3-9 Connecting multiple NETGEAR products...3-10 Straight-through twisted pair cable.. B-2 Crossover twisted pair cable.. B-2 RJ-45 connector... C-1 AUI connector pin assignments.. C-2 BNC connector... C-terminator and BNC T-connector.. C-4

Tables

Table 2-1. Table B-1. Table B-2. Table B-3. Table C-1. Table C-2.
LED descriptions...2-2 Electrical requirements of Category 3, 4, and 5 cables. B-1 Specications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable... B-3 Specications of AUI cable... B-3 RJ-45 connector pin assignments... C-2 AUI connector pin assignments.. C-3

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 ofces, and low-density workgroups of larger companies. This guide describes how to install and use the hub and includes physical conguration 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 specications

Features

Featuring a compact design, the Model EN516 hub offers all the features of a standard equipment rack-mount hub at a signicantly 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

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 congure 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 ve-year warranty on the unit and one-year warranty on the power supply
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).

16 PORT

10BASE-T

Ethernet Hub

Power BNC Rx AUI Rx
1 Link/Rx Partition Link/Rx Partition

Normal/Uplink 9 16

Collision Partition Partition
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

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.

Label Power BNC Rx AUI Rx Collision BNC Partition

LED descriptions

Color Green Green Green Yellow Yellow Activity On Blinking Blinking Blinking On Description Power is supplied to the hub. There is incoming data on the BNC port. There is incoming data on the AUI port. There is data collision on the network. Note that occasional collisions are normal. The BNC port is being partitioned because of excessive collisions, or when the BNC port is not connected. The AUI port is being partitioned because of excessive collisions. The link between this port and the other connecting port is good. There is incoming data on the port. The port is being partitioned because of excessive collisions.
AUI Partition Link/Rx (located on top left corner of each RJ-45 port) Partition (located on top right corner of each RJ-45 port)

Yellow Green

Blinking Yellow On

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.

Normal/Uplink Push Button
The Normal/Uplink push button on the Model EN516 hub allows you to select Normal (MDI-X) or Uplink (MDI) wiring for port 16, eliminating the need to use a crossover cable to connect similarly wired devices. Port 16 is congured for Normal wiring when the push button is in the out position. When the push button is pressed in, Port 16 is congured for Uplink wiring. Ports 1 to 15 on the hub cannot be congured for Uplink wiring. If you are using one of these ports to connect to a Normal port in another hub, you must use an RJ-45 crossover cable to connect the two ports. See Figure B-2 for crossover cable information.

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, ber 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. The hub accepts between 100 and 240 V AC, 50/60 Hz.
BNC AUI 100-240 VAC 50-60 Hz 0.15A
Key: 1 = AUI port 2 = BNC port 3 = AC power receptacle

Figure 2-2.

Rear panel of the Model EN516 hub

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 0C and 40C. The maximum relative humidity must not exceed 90%. You can install the hub on a at surface, such as a tabletop or shelf, or within a standard 19-inch rack. You should ensure that the front and rear panel of all units to be connected are easily accessible for connecting cables and power and for monitoring the LED indicators.

Package Contents

The package should contain the following items: Model EN516 hub This manual

Installation

AC power cord Rack mount kit Four rubber pads for installation on a at 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. Use them to repack the hub if there is a need to return it for repair. Be sure to complete the Owner Registration Card and return it to NETGEAR to qualify for product updates and product warranty registration.

3-4 Installation

Port 16 is switchable between Normal (MDI-X) and Uplink (MDI) positions and should be congured 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. Set the Normal/Uplink push button to the Uplink position and use a straight-through cable if the remote end of the cable is connected to an MDI-X device such as a 10 Mbps or 100 Mbps hub or repeater.
For further cabling guidelines, refer to Appendix B, Cabling Specications. Refer to the following illustrations for connecting to the RJ-45 ports and proceed to Completing and Verifying the Installation on page 3-11. Figure 3-2 illustrates a workstation connected to an RJ-45 port on the Model EN516 hub.

l/Uplin

Key: 1 = Network adapter card with RJ-45 connector 2 = UTP cable to Model EN516 hub

Figure 3-2.

Connecting a workstation to an RJ-45 port on the Model EN516 hub
Note: Ethernet specications limit segments to 328 feet (100 m) in length.
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.

1 Model EN516 hub

2 Model EN516 hub Model EN516 hub

3 Model EN516 hub

5 Model EN516 hub Model EN516 hub

6 Model EN516 hub

Key: 1 = Model EN516 hub with the Normal/Uplink push button set to Normal position 2 through 7 = Model EN516 hub with the Normal/Uplink push button set to Uplink position

Figure 3-3.

Cascading multiple hubs in a hierarchical star through the RJ-45 ports
Note: Ethernet specications limit the number of hubs in any communication path to ve hubs, as shown in Figure 3-3. For example, when PC A communicates with PC B, the communication path goes from hub 5 to hub 7, passing through hubs 2, 1, and 4.
Figure 3-4 illustrates multiple hubs cascaded in a daisy-chain style.

2 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. When cascading hubs daisy-chain style through the twisted pair cable, stay within Ethernet specications and make sure the total hub count does not exceed ve hubs.

Connecting to the BNC Port
The BNC port at the rear panel of the Model EN516 hub is used for connecting to a thin coaxial segment. You can connect servers, workstations, or other devices to the BNC port or several Model EN516 hubs as shown in Figure 3-5. By using the BNC port for cascading, you treat each connected hub as just another node on the coaxial segment. When using the BNC interface, follow these steps:
Insert the BNC T-connector on the BNC port of the Model EN516 hub. Connect the coaxial cable that leads from a device on the network to one of the self-locking ends of the BNC T-connector.
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 terminator that is provided with the product. Proceed to Completing and Verifying the Installation on page 3-11.
Figure 3-5 illustrates three hubs cascaded through the BNC connector. The separation marks in the coaxial cable between the two top hubs illustrate the incorporation of other devices and show that interconnection is not limited to hubs.
Key: 1 = 50 terminators 2 = BNC T-connector

Figure 3-5.

Cascading hubs through the BNC port
Note: Ethernet specications limit a BNC segment to 30 stations, specify a minimum of 0.5 m between any two stations, and limit segments to 600 feet (185 m) in length.
For further information about using coaxial cables, refer to Appendix B, Cabling Specications.
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. With the right type of transceiver, you could use the AUI port to connect to most types of network media, including 10BASE-T twisted pair, thin coaxial, thick coaxial, and 10BASE-FL ber optic cables.
Disable the signal quality error (SQE) test function for each external transceiver connected to the AUI port. Refer to your transceiver documentation for information about disabling the SQE test function.
Note: If the SQE test function is not disabled, the port is automatically partitioned.
Proceed to Completing and Verifying the Installation on page 3-11.
Key: 1 = Cable termination device 2 = 10BASE-5 transceiver
3 = Thick coaxial cable 4 = Transceiver cable (AUI cable)

Figure 3-6.

Cascading hubs through the AUI port
Note: Ethernet specications 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. Figure 3-7 illustrates power users on a 100 Mbps network using the NETGEAR Model FE516 Fast Ethernet Hub and connecting to the 10 Mbps network through a Model SW507 switch.

Model FE516 hub

Model SW507 switch

Model EN516 hub

Key: 1 = Workstations 2 = 100 Mbps connection 3 = NETGEAR Model FE516 Fast
4 = Server 5 = NETGEAR Model SW507 Ethernet switch 6 = 10 Mbps connection Ethernet hub

Figure 3-7.

Connecting multiple NETGEAR products
Completing and Verifying the Installation
To complete the installation, connect the power cord rst 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.
If there are any problems, refer to Chapter 4, Troubleshooting.
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. Data collision is normal on Ethernet networks and occurs when two or more devices transmit data on the network simultaneously. The devices that caused the collision automatically back off and then retry transmission at different intervals until the transmission succeeds. Excessive collisions can result for several reasons. Some factors that can contribute to excessive collisions are: The network is extremely busy. Defective devices are connected on the network that cannot detect network trafc or collisions. Wrong cables are being used. Many home telephone cables can cause a collision condition because the cable is not constructed with twisted pair wires and cannot be used in place of UTP cables. Wrong cables are being used for connecting MDI (or Uplink) and MDI-X (or Normal) wired devices.

Troubleshooting

Defective connectors are being used.
For further information on pin assignment and cable specications, refer to Appendix B, Cabling Specications, 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. If the Link/Rx LED is not on after cabling has been installed, check for a bad cable, cable pairs that are not correctly wired, or loose connectors. Also check to see whether or not there is power for both the hub and the Ethernet transceiver on the connected PC or other device. The green Link/Rx LED indicator blinks when there is data reception on the port.
AUI Rx LED and BNC Rx LED for the AUI and BNC Ports
The green AUI Rx LED and BNC Rx LED blink when there is data reception on the AUI or BNC port.
Partition LED for the RJ-45 Ports
The yellow Partition LED on each of the RJ-45 ports turns on when the port is being partitioned after 32 continuous collisions are detected on the connected segment. After the rst good packet without a collision is received, the yellow Partition LED on the RJ-45 port turns off, and the port is reconnected.
Partition LED for the BNC Port
The yellow Partition LED indicator turns on when the BNC port has been partitioned after 32 continuous collisions are detected on the BNC port. After the rst good packet without a collision is received, the yellow Partition LED on the BNC port turns off, and the port is reconnected. The BNC port is partitioned when there are one or more of the following conditions: No coaxial cable connected to the BNC port Faulty cable or connectors Excessive collisions on the connected segment
Disconnected point somewhere along the coaxial cable length Segment that is not terminated with a 50 terminator on both ends
Check all connectors along the cable length. If the segment is not terminated, terminate both ends with 50 terminators.
Partition LED for the AUI Port
When the AUI port is connected with a 10BASE-T twisted pair or 10BASE-FL ber optic transceiver, the Partition LED turns on after 32 continuous collisions are detected on the connected segment. After the rst good packet without a collision is received, the Partition LED on the AUI port turns off, and the port is reconnected. If the port is connected with coaxial media type AUI transceivers, the LED functions the same way as described in the previous section, Partition LED for the BNC Port. Be sure that the coaxial transceiver is functioning properly and that the signal quality error (SQE) test has been disabled.
Verify that all system components have been properly installed. If one or more components are malfunctioning, isolate the defective component(s) by testing them in a different environment where all other components are functioning properly.

Cabling

Figure B-1.

Straight-through twisted pair cable

1 Rx 3 6

Key: 1 = Normal or MDI-X port 2 = Normal or MDI-X port

Figure B-2. B-2

Crossover twisted pair cable Cabling Specifications

50 Coaxial Cable

The 50 coaxial cable, the BNC T-connector, and the 50 terminator, allow a user to construct a 10BASE-2 network. Table B-2 lists the specications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable.
Table B-2. Specications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable
Attenuation (185 m cable) <8.5 db @ 10 MHz <6.0 db @ 5 MHz Transfer impedance 20 m @ 1 MHz 100 m @ 10 MHz 500 m @ 100 MHz DC loop resistance 50 m /meter
Characteristic impedance 50 +/-2
The Ethernet specications limit segments to 30 stations, specify a minimum of 0.5 m between any two stations, and limit segments to 600 feet (185 m) in length.

AUI Cable

The AUI cable connects the AUI port on the Model EN516 hub to a transceiver. The Ethernet specications limit the cable length to 164 ft (50 m). Table B-3 lists the specications of AUI cable.
Table B-3. Specications of AUI cable
AUI cable specications <1.75 per conductor Minimum 40 dB attenuation from 5 MHz to 10 MHz 78 +/- 5 at 10 MHz <3 difference between pairs <10 m @ 500 KHz <3 m @ 2 MHz <3 m @ 10 MHz <30 m @ 100 MHz <3 dB from 5 MHz to 10 MHz <1.0 ns introduced by the cable system <257 ns
Electrical characteristic Nominal dc resistance Pair-to-pair balanced crosstalk Differential characteristic impedance Transfer impedance
Attenuation Timing jitter Total signal delay
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.

Figure C-1.

RJ-45 connector
Connector Pin Assignments
Table C-1 lists the pin assignments for the RJ-45 connector.

Table C-1.

Pin 4, 5, 7, 8
RJ-45 connector pin assignments
Normal assignment on ports 1 to 15 Input Receive Data + Input Receive Data Output Transmit Data + Output Transmit Data Not used Uplink assignment on port 16 Output Transmit Data + Output Transmit Data Input Receive Data + Input Receive Data Not used

AUI Connector

The AUI connector for the Model EN516 hub connects the hub through an external transceiver to other devices. An inter-repeater ber link for 10BASE-F or FOIRL are examples of such applications. Figure C-2 illustrates the AUI connector pin assignments.

Figure C-2.

AUI connector pin assignments
Table C-2 lists the AUI connector pin assignments.

Table C-2.

Pin 1, 4, 11, 14, 6 7, 13
Signal Ground CI-A DO-A DI-A + 12V DC return Not used CI-B DO-B DI-B + 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.
Key: 1 = Center conductor 2 = Ground shield

Figure C-3.

BNC connector
BNC T-Connector and 50 Terminator
The BNC port on the Model EN516 hub, with the BNC T-connector and the 50 terminator, is used for connecting to a thin coaxial segment. Figure C-4 illustrates the BNC T-connector and 50 terminator. For information on connecting to the BNC port, refer to Chapter 3, Installation, and Appendix B, Cabling Specications.

50 OHM

Figure C-4.
50 terminator and BNC T-connector

Numerics

10BASE2 coaxial cable specications (table) B-3
cable 10BASE-2 coaxial cable specications (table) B-3 50-ohm coaxial B-3 AUI B-3 Category 3 B-1 Category 4 B-1 Category 5 B-1 crossover twisted pair 3-4, B-2 RG 58 A/U specications (table) B-3 RG 58 C/U coaxial B-3 specications B-1 straight-through twisted pair 3-5, B-2 troubleshooting 4-3 cascading daisy-chain style 3-7 hierarchical star style 3-6 ports 3-4 to 3-9 Certicate of the Manufacturer iii coaxial cable specications (table) B-3 Collision LED 2-2, 4-1 conguration, troubleshooting 4-4 connecting ports 3-4 to 3-9 to MDI (or Uplink) device B-2 to MDI (or Uplink) port 3-4, B-2 to MDI-X (or Normal) port 3-4
attachment unit interface. See AUI AUI cable specications (table) B-3 AUI connector pin assignments (table) C-2 AUI Partition LED 2-2, 4-3 AUI port cascading hubs through 3-9 connecting to 3-9 description 2-4 AUI Rx LED 2-2, 4-2
BNC 50 ohm terminator C-4 connector C-3 T-connector C-4 BNC Partition LED 2-2, 3-11, 4-2 BNC port cascading hubs through 3-7 connecting to 3-7 description 2-4 BNC Rx LED 2-2, 4-2
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
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

daisy-chain cascade 3-7

FCC statement ii features 1-1 front panel 2-1
MDI device, setting Normal/Uplink push button 2-3 MDI port, connecting to B-2 MDI-X device, setting Normal/Uplink push button 2-3 MDI-X port, connecting to B-2

hierarchical star cascade 3-6
installation cascading ports 3-4 to 3-9 completing 3-11 connecting ports 3-4 to 3-9 connecting to NETGEAR products 3-10 daisy-chain style 3-7 in a rack 3-3 network interface cards 4-4 on a at surface 3-3 package contents 3-1 tools required 3-2 troubleshooting 4-3 verifying 3-11, 4-4
network interface cards, troubleshooting 4-4 Normal/Uplink push button setting for MDI 2-3 setting for MDI-X 2-3
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 specications A-1 technical support iii troubleshooting cable 4-3 conguration 4-4 installation 4-3, 4-4 LEDs 4-1 network interface cards 4-4
unshielded twisted pair cable. See RJ-45
rear panel 2-4 RG 58 A/U coaxial cable specications (table) B-3 RG 58 C/U coaxial cable B-3 RJ-45 connector pin assignments (table) C-1 RJ-45 Link/Rx LED 2-2, 3-11, 4-2 RJ-45 Partition LED 2-2 RJ-45 ports cascading hubs through 3-4 conguring port 16 3-5 connecting Apple Macintosh computers 3-4 connecting PCs 3-4 connecting UNIX workstations 3-4 description 2-3 using crossover cable 3-4 using straight-through cable 3-5
warranty 1-2 World Wide Web iii
site preparation 3-1 straight-through twisted pair cable B-2

Installation Guide for the Model FS516 Fast Ethernet Switch
NETGEAR, Inc. 4500 Great America Parkway Santa Clara, CA 95054 USA Phone: 1-888-NETGEAR E-mail: support@NETGEAR.com www.NETGEAR.com
M-FS516NA-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.
Certicate of the Manufacturer/Importer
It is hereby certied that the Model FS516 Fast Ethernet Switch 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 Ofce for Telecommunications Approvals has been notied of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations.
Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice
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 Statement

This is to certify that the Model FS516 Fast Ethernet Switch 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 Class A (CISPR 22).
Warning: This is a Class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take appropriate measures.
Besttigung des Herstellers/Importeurs
Es wird hiermit besttigt, da das Model FS516 Fast Ethernet Switch gem der im BMPT-AmtsblVfg 243/1991 und Vfg 46/1992 aufgefhrten Bestimmungen entstrt ist. Das vorschriftsmige Betreiben einiger Gerte (z.B. Testsender) kann jedoch gewissen Beschrnkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung. Das Bundesamt fr Zulassungen in der Telekommunikation wurde davon unterrichtet, da dieses Gert auf den Markt gebracht wurde und es ist berechtigt, die Serie auf die Erfllung der Vorschriften hin zu berprfen.
Voluntary Control Council for Interference (VCCI) Statement
This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise. When such trouble occurs, the user may be required to take corrective actions.
Canadian Department of Communications Radio Interference Regulations
This digital apparatus (Model FS516 Fast Ethernet Switch) does not exceed the Class A limits for radio-noise emissions from digital apparatus as set out in the Radio Interference Regulations of the Canadian Department of Communications.
Rglement sur le brouillage radiolectrique du ministre des Communications
Cet appareil numrique (Model FS516 Fast Ethernet Switch) respecte les limites de bruits radiolectriques visant les appareils numriques de classe A prescrites dans le Rglement sur le brouillage radiolectrique du ministre des Communications du Canada.

Customer Support

For assistance with installing and conguring your NETGEAR system or with post-installation questions or problems, contact your point of purchase representative. Defective or damaged merchandise can be returned to your point-of-sale 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 telephone numbers: Phone: Australia Austria Denmark Canada Finland France Germany Hong Kong Japan 1800-787-638 00800-06384327 (00800-0-NETGEAR) 808-82179 1-888-NETGEAR 0800-111-036 0800-77-17-53 00800-06384327 (00800-0-NETGEAR) 001-800-1233-4566 0120-66-5402 Korea Netherlands New Zealand Norway Singapore Sweden Switzerland United Kingdom United States All Other Countries 00308-11-0319 0800-023-0981 00800-1233-4566 800-12041 001-800-1233-4566 0200-298-298 00800-0638-4327 (00800-0-NETGEAR) 020-7216-0014 1-888-NETGEAR +1 801-236-8499

Model FS516 Switch Overview
The Model FS516 switch is an autosensing 10/100 Mbps switch. This feature-rich switch is developed primarily to be used as a segment switch, even though it is priced as a desktop switch. All 16 ports on the Model FS516 switch can adapt automatically to the speed of the connected network or the PC, and the ports can operate at either 10 Mbps or 100 Mbps. In addition, each port can automatically negotiate with the connected device to operate in full-duplex mode. If the connected device is operating at half-duplex mode only or does not have the capability to participate in the negotiation process, the port will default to half-duplex mode. A manual override duplex toggle switch is also provided to force any particular port to operate in full-duplex mode.

Introduction

The Model FS516 switch can be used to partition a 10 Mbps or 100 Mbps network to enhance the capacity of the network to support advanced applications. In addition, the switch provides a link between traditional 10 Mbps networks and faster 100 Mbps networks. By installing a Model FS516 switch, a user can connect any 10 Mbps or 100 Mbps device to the switch without worrying about the running speed of the device. The Model FS516 switch provides a built-in upgrade path; you can remove a 10 Mbps connection and replace the connection with a 100 Mbps connection with little or no change to the rest of the network. The Model FS516 switch can be effectively used to join multiple 100 Mbps Fast Ethernet segments and to extend the reach of the network. Copper-based Fast Ethernet networks have a network diameter of up to 200 meters. The Model FS516 switch can be used to join these 200 meter segments to enable them to function as a single logical network. With one Model FS516 switch, the reach extends to 400 meters. With two switches, the reach extends to 600 meters. For an illustration of using the switch to extend a network, refer to Figure 3-3 on page 3-4. Because the Model FS516 switch is an ISO media access control (MAC) layer device, the switch is network protocol independent and compatible with all popular networks such as the Internet or TCP/IP, NetWare, DECnet, Microsoft NETBEUI, and LANTASTIC.

Features

The Model FS516 switch has the following key features: Sixteen automatic speed sensing (autosensing) 10/100 Mbps Ethernet ports to provide fast information exchange, resource sharing, and client or peer-to-peer communication using simple Category 5 unshielded twisted pair (UTP) cable Automatic address learning function to build the packet-forwarding information table The table contains up to 4,000 MAC addresses (that is, the switch can support networks with as many as 4,000 devices). Switch-selectable autonegotiating or full-duplex mode of operation Full-duplex mode doubles throughput of point-to-point connections by letting individual ports transmit and receive concurrently when the other end also supports full-duplex mode. The default is half-duplex if the connected device does not support N-way negotiation. The duplex toggle switch can be set to full-duplex if the connected port is operating at full-duplex mode. Wire-speed ltering and forwarding to provide trafc cop function by directing trafc to the appropriate route without slowing down the trafc Store-and-forward forwarding node to minimize erroneous packets on the network
Minimum latency of packet transmission (leading edge to leading edge) less than 80 s Easy Plug-and-Play installation with no software to congure, which saves time and minimizes the potential for conguration errors Normal/Uplink push button to simplify network extension The switch can be connected to a hub using a simple, straight-through cable.
Protocol independence and compatibility with all common protocols such as TCP/IP, NetWare, DECnet, and Microsoft Networks Sixteen vista RJ-45 network ports with built-in LEDs to monitor individual port status Microprocessor-based design to monitor network utilization, collisions, and link status A comprehensive LED indicator panel for monitoring switching condition and individual port status Conformity to the IEEE 802.3u 100BASE-TX standard Conformity to the ISO/IEC 8802-3 and ANSI/IEEE 802.3 10BASE-T standards 64-kilobyte (KB) input/output buffer for each port Rack Mount Kit provided for installing the switch in a standard 19-inch equipment rack
Chapter 2 Physical Description
This chapter describes the hardware features of the Model FS516 Fast Ethernet Switch.

Front Panel

For easier management and control of the Model FS516 switch, familiarize yourself with the ports, LEDs, and Normal/Uplink push button on the front panel of the switch, as illustrated in Figure 2-1.

16PORT

10/100Mbps

Fast Ethernet Switch

100 Mbps 10 Mbps
10 On=Link, Blinking=Receive On=Link, Blinking=Receive

8 Normal/Uplink

8235FA
Key: 1 = Power LED 2 = 100 Mbps LEDs for ports 1 through = ACT/COL LEDs for ports 1 through = ACT/COL LEDs for ports 9 through = 100 Mbps LEDs for ports 9 through = 10/100 Mbps ports with Link and FDX LEDs on each port 7 = Normal/Uplink push button to congure port 16

Figure 2-1.

Front Panel of the Model FS516 Switch

Physical Description

Fast Ethernet Ports
As Figure 2-1 shows, the Model FS516 switch is equipped with 16 autosensing 10/100 Mbps Fast Ethernet ports. The network access speed for the 10/100 Mbps ports is automatically sensed and displayed on the front panel by the 100 Mbps LEDs. The 10/100 Mbps ports support only unshielded twisted pair (UTP) cable using an 8-pin RJ-45 plug. Each of the 10/100 Mbps ports uses vista RJ-45 connectors that have built-in LEDs, as illustrated in Figure 2-2. The LEDs, as described in Table 2-1, indicate that the connection to the port is valid and that the port is operating in full-duplex mode. For further information about the vista RJ-45 connector and the RJ-45 plug, refer to Appendix B, Connector Pin Assignments.
Key: 1 = Link LED 2 = FDX LED

Figure 2-2.

The Vista RJ-45 Connector with Built-In LEDs
Normal/Uplink Push Button
The Normal/Uplink push button on the front panel of the switch, as illustrated in Figure 2-1, allows you to select uplink (MDI) or normal (MDI-X) wiring for port 16 on the Model FS516 switch. This port is congured for normal wiring to connect to a PC when the push button is in the out position. When the push button is pressed in, this port is congured for uplink wiring to connect to another switch or to a hub, using a straight-through twisted pair cable.
The LEDs on the front panel of the switch and two vista LEDs on each RJ-45 connector allow you to identify the following information: Status of the switch power supply For each 10/100 Ethernet port: Link status Data transmission or receive activity Collision occurrence Full-duplex or half-duplex mode 10 Mbps or 100 Mbps speed transmission
Table 2-1 describes each LED on the front panel of the switch.

Table 2-1.

Label Power

LED Descriptions

Color Green Activity On Off Description Power is supplied to the switch. Power is disconnected. Packet transmission or reception is occurring on the port. The blinking action corresponds to the number of packets that are transmitted or received. Data collisions are occurring on the port. The blinking action corresponds to the number of collisions. When a collision occurs, the connected device pauses and transmits again after waiting a specied time. Note that occasional collisions are normal. The port is operating at 100 Mbps. The port is operating at 10 Mbps. A valid link is established on the port. A link is not established on the port. The port is operating in full-duplex mode. The port is operating in half-duplex mode.

ACT/COL

Blinking

Yellow

100 Mbps

On Off

Link (located at the top Green left corner of each 10/100 Mbps port) FDX (located at the top Green right corner of each 10/100 Mbps port)

On Off On Off

Rear Panel
As illustrated in Figure 2-3, the rear panel has a full-duplex (FDX) toggle switch, an auto-duplex (AUTO) toggle switch, a standard AC power receptacle, and fans for cooling.

AUTO FDX -

Enable port to determine duplex mode automatically Force port to operate at Full Duplex and Half Duplex mode only

1 FDX AUTO

10/100 Mbps 8 1
100-240 VAC 50-60 Hz 0.5A

8236FA

Key: 1 = FDX and AUTO duplex toggle switches 2 = Fans 3 = AC power outlet

Figure 2-3.

Rear Panel of the Model FS516 Switch
FDX/AUTO Duplex Toggle Switches
Full-duplex mode is supported for all 10/100 Mbps ports and allows the port to transmit and receive data at the same time. Full-duplex operation applies only to point-to-point access (for example, when a switch is connected to a PC, a server, or another switch). Setting the toggle switch to AUTO on the 10/100 Mbps port enables the port to determine duplex mode automatically. In this mode, the 10/100 Mbps port operates in either full- or half-duplex mode, depending on the operating mode of the remote port. If the remote port cannot provide the proper signal to indicate its own capability, the 10/100 Mbps port on the switch will default to half-duplex mode. Because repeaters and hubs use a common collision domain for all communications and cannot communicate in full-duplex mode, the associated 10 Mbps port on the switch should be set to auto-duplex operation when connecting to these types of devices. As illustrated in Figure 2-3, one full-duplex (FDX) and auto-duplex (AUTO) toggle switch is assigned to each 10/100 Mbps port on the Model FS516 switch. The communication mode can be set to either full-duplex or auto-duplex mode.

Chapter 3 Applications

This chapter presents an overview of the levels of service provided by incorporating the technology of the Model FS516 Fast Ethernet Switch into your network. The Model FS516 switch is designed to provide exibility in conguring your network connections. Each switch can be used as a standalone device or can be used with 10 Mbps or 100 Mbps hubs or other interconnection devices in various congurations. The conguration examples in this chapter illustrate the integration of the switches in network environments of all sizes and types. These examples include a network of a few workstations connected to a printer or a segmented network with multiple users or workgroups and other networking devices.

Applications

Desktop Switching
Figure 3-1 illustrates the Model FS516 Fast Ethernet Switch used as a desktop switch to build a small network that enables users to have 100 Mbps access to a le server.

8237FA

Key: 1 = Server with 100 Mbps connection 2 = Model FS516 Fast Ethernet Switch (Normal/Uplink push button set to Normal position) 3 = PCs with 100 Mbps Ethernet adapter cards installed 4 = PC with 10 Mbps connection

Figure 3-1.

Using the Model FS516 Switch for Desktop Switching
Note: If a full-duplex adapter card is installed in the server or PC, a 200 Mbps connection is possible on the port where the server or PC is connected.

Segment Switching

The Model FS516 switch can segment a network into multiple connected pieces, increasing overall bandwidth and throughput. Figure 3-2 illustrates the Model FS516 Fast Ethernet Switch segmenting networks that are built with the NETGEAR Model FE508 and Model FE516 Fast Ethernet Hubs.

8238FA

Key: 1 = Model FS516 Fast Ethernet Switch (Normal/Uplink push button set to Normal position) 2 = 100 Mbps connection 3 = Model FE508 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 4 = Model FE516 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 5 = Servers with 100 Mbps connection 6 = PCs with network adapter installed, enabling 100 Mbps connection

Figure 3-2.

Model FS516 Switch Used as a Segment Switch

Extending a Network

Ethernet specications limit the length of cable between hubs and PCs to 100 meters for a total diameter of 200 meters. By adding Fast Ethernet switches between hubs, the network is expanded by 200 Mbps with the addition of each switch. Figure 3-3 illustrates a network of NETGEAR Model FE508 Fast Ethernet Hubs integrated with three Model FS516 Fast Ethernet Switches.

8241FA

Key: 1 = Model FS516 Fast Ethernet Switch (Normal/Uplink push button set to Uplink position) 2 = 100 Mbps connection 3 = Model FE508 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 4 = PCs with 100 Mbps connection

Figure 3-3.

Using the Model FS516 Switch for Network Extension
Bridging from 10BASE-T to 100BASE-TX Networks
The Model FS516 switch can function as a two-port bridge connecting traditional 10BASE-T Ethernet networks to 100BASE-TX Fast Ethernet networks. Users requiring increased network bandwidth can be upgraded to 100 Mbps while remaining connected to the rest of the network. Figure 3-4 illustrates the Model FS516 Fast Ethernet Switch integrated with the NETGEAR Model EN516 Ethernet Hub and the NETGEAR Model FE516 Fast Ethernet Hub.

Fiber Switch

8239FA
Key: 1 = Model FS516 Fast Ethernet Switch (Both Normal/Uplink push buttons set to Normal position) 2 = 10 Mbps connection 3 = 100 Mbps connection 4 = Model EN516 Ethernet Hub (Normal/Uplink push button set to Uplink position) 5 = Model FE516 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 6 = PCs with 10 Mbps connection 7 = PCs with 100 Mbps connection 8 = Server with 100 Mbps connection

Figure 3-4.

Bridging 10 Mbps Networks to 100 Mbps Networks
High-Bandwidth File Servers
The Model FS516 switch increases bandwidth for workgroups and strengthens network throughput when accessing high-volume le servers. The switch provides parallel communication between each of the ports. This method of communication allows multiple conversations to occur concurrently, expands overall throughput, and enables key servers or other heavily used devices to be available to more users. Figure 3-5 illustrates the Model FS516 Fast Ethernet Switch integrated with two NETGEAR Model FE508 Fast Ethernet Hubs. A full-duplex congurable adapter card installed in the server provides up to 200 Mbps maximum data throughput.

8240FA

Key: 1 = Model FS516 Fast Ethernet Switch (Normal/Uplink push button set to Normal position) 2 = Server with full-duplex 100 Mbps connection (200 Mbps) 3 = 100 Mbps connection 4 = Model FE508 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 5 = PCs with 100 Mbps connection

Figure 3-5.

High-Bandwidth File Server Connection

Chapter 4 Installation

This chapter describes the installation procedures for the Model FS516 Fast Ethernet Switch.

Site Preparation

Before you begin installing the switch, prepare the installation site. Make sure the operating environment meets the physical requirements of the switch, as described in Appendix A, Technical Specications.

Package Contents

Unpack the contents of the package and verify them against the following list: Model FS516 switch Self-adhesive rubber pads for desktop installation Rack Mount Kit for rack installation AC power cord Warranty and Owner Registration Card This installation guide
Caution: Use the appropriate power cord as required by your national electrical codes and ordinances.

Installation

Call your reseller or customer support in your area if there are any wrong, missing, or damaged parts. Refer to page iv for the location of customer support in your area. Keep the carton, including the original packing materials. Use them to repack the switch if you need to return it for repair. To qualify for product updates and product warranty registration, ll in the Warranty and Owner Registration Card within 30 days of purchase and return it to NETGEAR, Inc.

Installing a Switch

To install a switch on a desktop, on another at surface, or in a rack:

1. 2. 3.

Unpack the switch. Choose a location near the devices to be connected and close to an electrical outlet. Proceed to Installing the Switch on a Flat Surface or Installing the Switch in a Rack.
Installing the Switch on a Flat Surface
To install the switch on a desktop or any other at surface:
Install self-adhesive rubber pads on the bottom of the switch. Peel off the protective backing from the rubber pads and apply one at each marked location on the bottom of the switch.
Set the switch on a desktop or any other at surface. For proper ventilation, make sure that the switch has at least 2 inches of space on each side and 5 inches of space at the back. It is very important that the fans located in the rear panel are not blocked. Restricted airow could cause overheating of the components.
Install any additional devices in your stack. Up to four switches can be stacked. For instructions on connecting to additional switches or other devices, refer to Connecting to Other Devices later in this chapter.
Installing the Switch in a Rack
For mounting the switch in a standard 19-inch rack, you need the following tools and materials: Two mounting brackets supplied from the Rack Mount Kit Eight screws supplied from the Rack Mount Kit to attach the mounting brackets to the switch Four screws and nylon washers supplied from the Rack Mount Kit to attach the mounting brackets to the rack #1 Phillips screwdriver #2 Phillips screwdriver

Symptom

Troubleshooting Information (continued)

Cause Solution

One or more components All system components Test the components in an alternate environment are malfunctioning. are not properly installed. where all other components are functioning properly. A segment or device is not recognized as part of the network. One or more devices are not properly connected or cabling does not meet Ethernet guidelines. Verify that the cabling is correct (refer to Appendix C, Cabling Guidelines). Be sure all cable connectors are securely positioned in the required ports. Straight-through cables should be used for all standard twisted pair connections. Make sure all devices are connected to the network. Equipment may have been accidentally disconnected.

Network Adapter Cards

Make sure the network adapter cards installed in the PCs are in working condition and the software driver has been installed.

Conguration

If problems occur after altering the network conguration, restore the original connections and determine the problem by implementing the new changes, one procedure at a time. Make sure that cable distances, repeater limits, and other physical aspects of the installation do not exceed the Ethernet limitations.

Switch Integrity

If required, verify the integrity of the switch by resetting the switch. Turn power to the switch off and then back on. If the problem continues and you have completed all the preceding diagnoses, contact your NETGEAR point-of-sale representative.
Appendix A Technical Specications
This appendix provides technical specications for the Model FS516 Fast Ethernet Switch.

General Specications

Network Protocol and Standards Compatibility
ISO/IEC 802-3i 10BASE-T IEEE 802.3u 100BASE-TX

Data Rate

10 Mbps differential Manchester encoded, IEEE 802.Mbps with 4B5B encoding and MLT-3 physical interface for 100BASE-TX

Interface

RJ-45 connector for 10BASE-T and 100BASE-TX Fast Ethernet

Electrical Specications

Power consumption:

Physical Specications

29 W (W) 13 by (H) 1.7 by (D) 8 in. (W) 33.0 by (H) 4.3 by (D) 20.3 cm 5.3 lb 2.5 kg

Dimensions: Weight:

Technical Specifications
Installation Guide for the Model FS516 Fast Ethernet Switch Environmental Specications
Operating temperature: Storage temperature: Operating humidity: Storage humidity: Operating altitude: Storage altitude:
Electromagnetic Emissions
0 to 40 C -32 to 104 C 90% maximum relative humidity, noncondensing 95% maximum relative humidity, noncondensing 10,000 ft (3,000 m) maximum 10,000 ft (3,000 m) maximum
Meets requirements of: CE mark, commercial FCC Part 15, Subpart B, Class A EN (CISPR 22), Class A VCCI Class 1
Electromagnetic Susceptibility
CE mark, commercial Electrostatic discharge (ESD): IEC 801-2, Level 2/3 Radiated electromagnetic eld: IEC 801-3, Level 2 Electrical fast transient/burst: Electrical surge: IEC 801-4, Level 2 IEC 801-5, Level 1/2
Installation Guide for the Model FS516 Fast Ethernet Switch Safety Agency Approvals
CE mark, commercial UL listed (UL 1950) CSA certied (CSA 22.2 #950) TUV licensed (EN 60 950)

Performance Specications

Frame lter rate:
14,800 frames/second, maximum on 10 Mbps port 148,000 frames/second maximum on 100 Mbps port

Frame forward rate:

Forwarding modes: Network latency: Address database size: Addressing: Queue buffer:
Store-and-forward Less than 80 microseconds for 64-byte frames in store-and-forward mode for 10 Mbps to 100 Mbps transmission 4,000 media access control (MAC) addresses per system 48-bit MAC address 64 KB queue buffer per port
Appendix B Connector Pin Assignments
This appendix provides information about the RJ-45 plug and the vista RJ-45 connector used for the Model FS516 Fast Ethernet Switch.
RJ-45 Plug and Vista RJ-45 Connector
In a Fast Ethernet network, it is important that all 100BASE-T certied Category 5 cabling use RJ-45 plugs. The RJ-45 plug accepts 4-pair unshielded twisted pair (UTP) or shielded twisted pair (STP) 100-ohm cable and connects into the vista RJ-45 connector. The vista RJ-45 connector (also referred to as a 10/100 Mbps port) is used to connect stations, hubs, and switches through UTP cable and supports 10 Mbps or 100 Mbps data transmission. The RJ-45 plug and vista RJ-45 connector are both illustrated in Figure B-1.

Maximum attenuation (dB per 100 m, at 20 C) at 4 MHz: 8.2 at 31 MHz: 11.7 at 100 MHz: 22.0 NEXT loss (dB minimum) at 16 MHz: 44 at 31 MHz: 39 at 100 MHz: 32

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. Computers and workstation adapter cards are usually media-dependent interface ports, called MDI or uplink ports. Most repeaters and switch ports are congured as media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. Figure C-1 illustrates straight-through twisted pair cable.

1 Tx 2

1 Rx 2

3 Rx 3 Tx

Key: A = Uplink or MDI port (as on a PC) B = Normal or MDI-X port (as on a hub or switch) 1, 2, 3, 6 = Pin numbers

Figure C-1.

Straight-Through Twisted Pair Cable
Figure C-2 illustrates crossover twisted pair cable.

3 Tx Tx 6

Key: B = Normal or MDI-X port (as on a hub or switch) 1, 2, 3, 6 = Pin numbers

Figure C-2.

Crossover Twisted Pair Cable C-3

Patch Panels and Cables

If you are using patch panels, make sure that they meet the 100BASE-TX requirements. NETGEAR recommends Category 5 UTP cable for all patch cables and work area cables to ensure that your UTP patch cable rating meets or exceeds the distribution cable rating. To wire patch panels, you need two Category 5 UTP cables with an RJ-45 plug at each end, as shown in Figure C-3.

87654321 87654321

5525.1
Key: 1 = RJ-45 plug 2 = Category 5 UTP patch cable

Figure C-3.

Category 5 UTP Patch Cable with Male RJ-45 Plug at Each End
Note: Flat silver satin telephone cable may have the same RJ-45 plug. However, using telephone cable will result in excessive collisions and cause the attached port to be partitioned or disconnected from the network.

Numbers

10/100 Mbps ports, 2-Mbps LEDs, 2-3 10BASE-T to 100BASE-TX networks, bridging, 3-5
data collisions, 2-3 desktop switching, 1-2, 3-2 duplex toggle switches, 1-2, 2-4, 4-5
applications bridging from 10BASE-T to 100BASE-TX networks, 3-5 desktop switching, 3-2 extending a network, 3-4 high-bandwidth le server connections, 3-6 segment switching, 3-3 AUTO duplex toggle switches, 2-4, 4-5 auto-duplex mode, 1-3
FDX duplex toggle switches, 2-4, 4-5 FDX LED, 2-3 features, 1-3 front panel, 2-1 full-duplex mode, 1-2, 2-3, 4-5
half-duplex mode, 2-3, 2-4 high-bandwidth le server connections, 3-6
bridging from 10BASE-T to 100BASE-TX networks, 3-5
installation in a rack, 4-3 on a at surface, 4-2 verifying, 4-5
cable Category 5, C-1, C-2, C-4 crossover twisted pair, 4-4, C-3 guidelines, C-2 specications, C-2 straight-through twisted pair, 4-4, C-3 termination method, C-1 connections to other devices, 4-4 crossover twisted pair cable, 4-4, C-3 customer support, iv Index
LEDs (table), 2-3 Link LED, 2-3
MAC layer device, 1-3 MDI. See uplink MDI-X. See normal mounting brackets, 4-3
segment switching, 1-2, 3-3 server connections, 3-6 site preparation, 4-1 straight-through twisted pair cable, 4-4, C-3 switches, duplex toggle, 1-2, 2-4, 4-5 switches, overview, 1-2 switching technology desktop switching, 1-2, 3-2 segment switching, 1-2, 3-3
network access speed, 2-2 extending, 3-4 normal ports, 2-2 wiring, 2-2, B-2, C-3 Normal/Uplink push button, 1-4, 2-1, 4-4
technical specications, A-1 toggle switches, duplex, 1-2, 2-4, 4-5 troubleshooting, 5-1
package contents, 4-1 patch panel, C-2, C-4 port 16, conguring, 2-2 ports, 2-1, 2-2 Power LED, 2-1, 2-3
uplink ports, 2-2 wiring, 2-2, B-2, C-3 UTP cable, Category 5, C-1
rear panel, 2-4 RJ-45 connector. See vista RJ-45 connector RJ-45 plug, using for patch cables, C-4 Rx/Tx LED, 2-3
vista RJ-45 connector description, 1-4, 2-2 pin assignments, B-1 using with UTP cable, 2-2

World Wide Web, iv