Customer Support

For assistance with installing and conguring your NETGEAR system or with questions or problems following installation: Check the NETGEAR Web page at http://www.NETGEAR.com. Call Technical Support at the phone number listed on the Support Information Card that shipped with your switch.
Defective or damaged merchandise can be returned to your point-of-purchase representative.

Internet/World Wide Web

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 Internet Explorer or Netscape are required.

Contents

Chapter 1 Introduction Benets of Using Switching Technology...1-1 Types of Ethernet Switches....1-2 Model FS518 Switch Overview....1-3 Features....1-4 Chapter 2 Physical Description Front Panel....2-1 1000BASE-SX Fiber Ports....2-3 Normal/Uplink Push Button...2-3 LEDs....2-4 Rear Panel.....2-6 Chapter 3 Applications Desktop Switching....3-2 Segment Switching....3-3 Chapter 4 Installation Preparing the Site....4-1 Checking Package Contents...4-1 Installing a Switch....4-2 Installing the Switch on a Flat Surface...4-2 Installing the Switch in a Rack...4-3 Connecting Devices to the Switch....4-5 Verifying Installation....4-6
Chapter 5 Troubleshooting Network Adapter Cards...5-2 Conguration....5-2 Switch Integrity....5-2 Autonegotiation....5-2 Appendix A Technical Specications General Specications.... A-1 Appendix B Connector Pin Assignments RJ-45 Plug and Vista RJ-45 Connector... B-1 Duplex SC Plug and Duplex SC Connector.. B-2 Appendix C Cabling Guidelines Fast Ethernet Cable Guidelines... C-1 Category 5 Cable.... C-2 Category 5 Cable Specications.... C-2 Twisted Pair Cables... C-3 Patch Panels and Cables.... C-4 Fiber Optic Cables.... C-5 Fiber Cable Specications... C-5 Gigabit Cable Guidelines... C-5 Index

Figures

Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 3-1. Figure 3-2. Figure 4-1. Figure 4-2. Figure 4-3. Figure B-1. Figure B-2. Figure C-1. Figure C-2. Figure C-3.
Front Panel of the Model FS518 Switch...2-1 Vista RJ-45 Connector with Built-In LEDs..2-2 1000BASE-SX Fiber Connection...2-3 Rear Panel of the Model FS518 Switch...2-6 Model FS518 Switch Used as a Desktop Switch..3-2 Model FS518 Switch Used as a Segment Switch.3-3 Attaching Mounting Brackets to the Model FS518 Switch..4-3 Tx/Rx Connection Between Switches..4-5 Connecting to the Model FS518 Fast Ethernet Switch..4-6 RJ-45 Plug and Vista RJ-45 Connector with Built-In LEDs. B-1 Duplex SC Connector and Duplex SC Plug Connection.. B-2 Straight-Through Twisted Pair Cable.. C-3 Crossover Twisted Pair Cable... C-3 Category 5 UTP Patch Cable with Male RJ-45 Plug at Each End.. C-4

Tables

Table 2-1. Table 5-1. Table B-1. Table C-1. Table C-2. Table C-3.
LED Descriptions...2-5 Troubleshooting Information...5-1 RJ-45 Plug and Vista RJ-45 Connector Pin Assignments.. B-2 Electrical Requirements of Category 5 Cable... C-2 Electrical Requirements of Fiber Optic Cable... C-5 Gigabit Cable Guidelines.. C-5

Chapter 1 Introduction

Congratulations on your purchase of the NETGEAR Model FS518 Fast Ethernet Switch. This switch provides you with a low-cost, high-performance network solution and is designed to support power workgroups operating at either 10 megabits per second (Mbps) or 100 Mbps. To relieve server and backbone bottlenecks, the Model FS518 switch also has two Gigabit Ethernet ber uplink ports.
Benets of Using Switching Technology
A majority of installed networks today are based on shared network technology. With this technology, a number of users or groups of users share a total available network bandwidth (or network capacity) of 10 Mbps, 100 Mbps, or other amounts of network bandwidth. For example, with a total of 10 users, the average bandwidth available to each user on a 10 Mbps network is calculated as 10/10 Mbps, which equals 1 Mbps of bandwidth per user. On a 100 Mbps (Fast Ethernet) network, the average bandwidth available to each of the 10 users is 100/10 Mbps, which equals 10 Mbps of bandwidth per user. Ethernet switches signicantly increase network throughput by segmenting network trafc. They check trafc coming in to each port to learn which network device is located on which segment. Based on this information, switches forward cross-segment trafc only to the appropriate segment. The trafc will not show up in the other segments because it is ltered out. In this way, network capacity is fully reserved for trafc destined for that segment only, and other segments will not be saturated with unnecessary trafc. Ethernet switches provide private, dedicated, 10 Mbps (or 100 Mbps) capacity to each connected PC/server or hub/workgroup segment, which is signicantly higher than in a shared environment. The higher bandwidth enables the use of applications such as multimedia, imaging, video, or high-performance client-server functions among users who are spread out over the network.

Introduction

Installation Guide for the Model FS518 Fast Ethernet Switch
This improvement is accomplished very easily, with no change to the desktop (the network interface cards or software and the network wiring). As a result, the performance upgrade and the applications it enables are obtained very quickly and at a low cost. When all network ports are operating at 100 Mbps and sending trafc to the server, the server needs a faster transmission speed to avoid bottlenecks. The 1000 Mbps (Gigabit) ports add the necessary increase in throughput.

Types of Ethernet Switches
Ethernet switches can be classied in different waysas desktop switches or as segment switches. A desktop switch is designed to support one or a few PCs per port. It is generally used when the individuals need the full 10 Mbps network throughput to support the applications. Often, these switches support only a single MAC (media access control) address per port, have high-speed 100 Mbps ports to connect to fast servers, and are relatively inexpensive compared to a segment switch. A segment switch, in contrast, is designed to support an entire workgroup on each port, with each port having signicant memory buffering and supporting thousands of MAC addresses. Switches can also be classied by speed. As the name suggests, 10 Mbps switches support only 10 Mbps connections. Similarly, 100 Mbps switches support only 100 Mbps connections. Usually, 10/100 Mbps switches have primarily 10 Mbps ports with only one or a few 100 Mbps ports. Autosensing 10/100 Mbps switches support 10 Mbps or 100 Mbps connections on each port and are the most versatile and adaptive type of switches. Gigabit (1000 Mbps) switch ports are used to connect to shared network resources and network backbones at higher speed.
Model FS518 Switch Overview
The NETGEAR Model FS518 Fast Ethernet Switch with Gigabit uplinks is an autosensing 10/ 100 Mbps switch with two Gigabit uplink interfaces. This high-performance switch is developed primarily to be used as a segment switch, even though it is priced as a desktop switch. All of the UTP ports on the Model FS518 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 in half-duplex mode only or does not have the capability to participate in the negotiation process, the port will default to half-duplex mode. The Model FS518 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 FS518 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 FS518 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 FS518 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 FS518 switch can be used to join these 200-meter segments to enable them to function as a single logical network. With one Model FS518 switch, the reach extends to 400 meters. The Gigabit Ethernet uplink ports on the Model FS518 switch can be used to connect to the network backbone and shared network resources such as servers at 1000 Mbps. The full-duplex 1000BASE-SX ports allow users to connect at high speed to a wiring closet or server located from 2 to 525 meters away. All 10/100 ports can autonegotiate the duplex mode with the connected device. If negotiation fails, the ports default to half-duplex mode. Gigabit ber ports will advertise their full-duplex operation and negotiate ow control with the connected device. If negotiation fails, the ports will default to full-duplex mode and no ow control. Because the Model FS518 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 FS518 switch has the following key features: 16 autonegotiating (speed and duplex mode) 10/100 Mbps UTP ports to provide fast information exchange, resource sharing, and client or peer-to-peer communication using simple Category 5 unshielded twisted pair (UTP) cable 16 vista RJ-45 network ports with built-in LEDs to monitor individual port status Two autonegotiating (duplex mode and ow control) Gigabit ber ports with standard SC connectors The ports support multimode optical ber (SX) up to 525 meters (m) with 50 m ber cable. With 62.5 m ber cable, the maximum distance is 260 m. Two 62.5/125 m ber cables included for connecting the Gigabit ports to servers or the network backbone Autonegotiation supported by all 10/100 Mbps and Gigabit ports Automatic address-learning function to build the packet-forwarding information table The table contains up to 8,000 MAC addresses (that is, the switch can support networks with as many as 8,000 devices). Wire-speed ltering and forwarding to direct trafc to the appropriate route without slowing down the trafc Store-and-forward forwarding mode to minimize erroneous packets on the network Aging function to automatically track changes in network conguration 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 Protocol independence and compatibility with all common protocols such as TCP/IP, NetWare, DECnet, and Microsoft Networks Normal/Uplink push button to simplify network extension to 10/100 segments Connection to a hub using a simple, straight-through cable
Conformity to standards: IEEE 802.3u 100BASE-TX standard ISO/IEC 8802-3 and ANSI/IEEE 802.3 10BASE-T standards IEEE 802.3z 1000BASE-SX standard
Rack Mount Kit provided for installing the switch in a standard 19-inch equipment rack or for mounting on the wall
Chapter 2 Physical Description
This chapter describes the hardware features of the NETGEAR Model FS518 Fast Ethernet Switch.

Front Panel

For easier management and control of the Model FS518 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.

Ethernet

Rx 1000M Link

18PORT

10/100Mbps Fast

Ethernet Switch

1 100M 10M

5 On = Link

Normal/Uplink Tx Rx 1000M Link
Green = FDX, Yellow = COL Rx/Tx 18
Green = FDX, Yellow = COL

9307FA

Key: 1 = Power LED 2 = RX/TX LEDs 3 = FDX/COL LEDs 4 = 10/100 Mbps UTP ports with 10M or 100M Link LEDs on each port 5 = Normal/Uplink push button for port = Gigabit Ethernet (1000BASE-SX) SC ber ports 7 = Link LEDs for the Gigabit Ethernet ports

Figure 2-1.

Front Panel of the Model FS518 Switch

Physical Description

As Figure 2-1 shows, the Model FS518 switch is equipped with 16 autosensing 10/100 Mbps Fast Ethernet UTP ports. The network access speed for the 10/100 Mbps ports is automatically sensed and displayed on the front panel by the 10 Mbps or 100 Mbps Link 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 on page 2-5, indicate that the connection to the port is valid and that the port is operating at either 10 or 100 Mbps. For further information about the vista RJ-45 connector and the RJ-45 plug, refer to Appendix B, Connector Pin Assignments, and Appendix C, Cabling Guidelines.
Key: 1 = 100M link LED 2 = 10M link LED

Figure 2-2.

Vista RJ-45 Connector with Built-In LEDs

1000BASE-SX Fiber Ports

The Model FS518 switch has two1000BASE-SX ber ports. These ports operate at 1000 Mbps full-duplex mode exclusively and provide a standard duplex SC connector for 62.5/125 m or 50/125 m multimode ber optic cable. Figure 2-3 shows a ber optic cable connection to a duplex SC connector. The Link LED to the right of the 1000BASE-SX ber port indicates whether or not proper signaling is established with the remote port. For further information about ber optic cables and connectors, refer to Appendix B, Connector Pin Assignments, and Appendix C, Cabling Guidelines.

8806FB

Figure 2-3.
1000BASE-SX Fiber Connection
Warning: Fiber optic equipment can emit laser or infrared light that might injure your eyes. Never look into an optical ber or connector port. Always assume that ber optic cables are connected to a light source.
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 FS518 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 power supply For each 10/100 Ethernet port: Network link at 10 Mbps or 100 Mbps Data transmission or receive activity Collision occurrence when in half-duplex mode or full-duplex mode
For the ber port: Link status (ber port 17 or 18 operates only at 1000 Mbps) Data transmission or receive activity Full-duplex operation
Table 2-1 describes each LED on the front panel of the Model FS518 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. No packet transmission or reception is occurring on the port. A full-duplex link is established on the port. A half-duplex link is established on the port, and the port is experiencing collisions. (Note that occasional collisions are normal.) No full-duplex link is established, or no collisions are occurring on the port when operating in half-duplex mode. A valid 100 Mbps link is established on the port. No 100 Mbps link is established on the port. A valid 10 Mbps link is established on the port. No 10 Mbps link is established on the port. A valid 1000 Mbps link is established on the port. No 1000 Mbps link is established on the port.

Blinking

Off FDX/COL Green Yellow On On
100M Link (located at the Green top left corner of each 10/100 Mbps UTP port) 10M Link (located at the top right corner of each 10/100 Mbps UTP port) 1000 Mbps Link (located to the right of the ber connector) Green

On Off On Off

On Off

Rear Panel

As illustrated in Figure 2-4, the rear panel of the Model FS518 switch has a cooling fan and a standard AC power receptacle.
100-240 VAC 50-60 Hz 0.50A

9317FA

Key: 1= Cooling fan 2= AC power outlet

Figure 2-4.

Rear Panel of the Model FS518 Switch

Chapter 3 Applications

This chapter presents an overview of the levels of service provided by incorporating the technology of the Model FS518 Fast Ethernet Switch into your network. The Model FS518 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, 100 Mbps, or 1000 Mbps hubs or other interconnection devices in various congurations. The conguration examples in this chapter illustrate the integration of the NETGEAR Model FS518 Fast Ethernet Switch with Gigabit uplinks 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 FS518 switch used as a desktop switch to build a small network that enables users to have Gigabit (1000 Mbps) access to a le server.

16PORT

9312FA
Key: 1 = Server with 2000 Mbps connection (1000 Mbps full-duplex) 2 = Model FS518 Fast Ethernet Switch (Normal/Uplink push button set to Normal position) 3 = PC with 10 Mbps connection 4 = PCs with 100 Mbps Fast Ethernet adapter cards installed

Figure 3-1.

Model FS518 Switch Used as a Desktop Switch
Note: If a full-duplex adapter card is installed in the server or PC, a 2000 Mbps connection is possible on the port where the server is connected.

Segment Switching

The Model FS518 switch can segment a network into multiple connected pieces, increasing overall bandwidth and throughput. Figure 3-2 illustrates the Model FS518 switch segmenting networks that are built with a NETGEAR Model FE508 Fast Ethernet Hub and a NETGEAR Model DS516 Dual Speed Hub.

9314FA

Key: 1 = Server with 100 Mbps connection 2 = Model FE508 Fast Ethernet Hub (Normal/Uplink push button set to Uplink position) 3 = PCs with network adapter installed, enabling 100 Mbps connection 4 = 100 Mbps connection 5 = Model FS518 Fast Ethernet Switch (Normal/Uplink push button set to Uplink position) 6 = Server with 2000 Mbps connection (1000 Mbps full-duplex) 7 = Model DS516 Dual Speed Hub (Normal/Uplink push button set to Uplink position) 8 = PC connected at 10 Mbps

Figure 3-2.

Model FS518 Switch Used as a Segment Switch

Chapter 4 Installation

This chapter describes the installation procedures for the Model FS518 Fast Ethernet Switch.

Preparing the Site

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.
Checking Package Contents
Unpack the contents of the package and verify them against the following list: NETGEAR Model FS518 Fast Ethernet Switch Two 25 foot (7.6 m) ber cables Self-adhesive rubber footpads for desktop installation Rack Mount Kit for rack installation AC power cord Warranty & Owner Registration Card This installation guide Support Information Card
Caution: Use the appropriate power cord as required by your national electrical codes and ordinances.

Installation 4-1

Call your reseller or customer support in your area if there are any wrong, missing, or damaged parts. Refer to the enclosed Customer Support Information Card for more information. 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 & 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 footpads 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.
Caution: Restricted airow could cause overheating of the components.

Installation

Installing the Switch in a Rack
To mount the switch in a standard 19-inch equipment rack, you need these 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
To install the switch in a rack:
Attach the mounting brackets to the sides of the switch as illustrated in Figure 4-1. Hold a mounting bracket against each side of the switch and align the countersunk screw holes in the bracket with the bracket mounting holes in the switch.
Insert the screws provided in the Rack Mount Kit through each bracket and into the bracket mounting holes in the switch. Using a #1 Phillips screwdriver, tighten the screws to secure each bracket.
Installation Guide for the Model FS518 Fast Ethernet Switch 4.
Hold the switch with the mounting holes in the brackets aligned with the holes in the rack.

8945FA

Figure 4-1. 5. 6.
Attaching Mounting Brackets to the Model FS518 Switch
Insert two pan-head screws with nylon washers through each bracket and into the rack. Using a #2 Phillips screwdriver, tighten the screws to secure the switch to the rack. 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.

To connect additional switches or other devices, refer to Connecting Devices to the Switch.
Connecting Devices to the Switch
To connect devices to the switch:
Connect the devices to the 10/100 Mbps ports on the switch, using Category 5 UTP cable.
Note: Ethernet specications limit the cable length between your PC or server and the switch to 328 feet (100 meters) in length.
Connect one end of the ber cable to the Gigabit uplink port and the other end to the linking server or network device.
Note: Gigabit Ethernet ber cable lengths are 260 m with 62.5 m multimode ber and 525 m with 50 m multimode ber.
Ensure that the Tx (transmit data) Gigabit ber connector of the Model FS518 switch is attached to the Rx (receive data) Gigabit ber connector of the remote partner using one of the pairs of the ber cable, as illustrated in Figure 4-2. Be sure that the Rx Gigabit ber connector of the switch is attached to the Tx Gigabit ber connector of the remote partner using the other pair from the same ber cable.
Model FS518 switch Tx Rx Remote Partner Tx Rx

9332EA

Figure 4-2. 3.
Tx/Rx Connection Between Switches
Connect one end of the AC power cord to the power outlet on the rear panel of the switch and the other end of the AC power cord to the wall outlet. Refer to Figure 4-3 on page 4-6 when connecting the Model FS518 switch.
Key 1000 Mbps 100 Mbps 10 Mbps

Pow er

10/1 T 00M bps

Fast Ethe rnet

Gree n=

Sw itch Rx/T

x 5 FDX , Yello 6 w= 7 COL 8 9

= Link

Norm al/U plink

Eth ern et

Tx Rx 1000

MODE L

FS 518

M Link

9315FB

Figure 4-3.

Connecting to the Model FS518 Fast Ethernet Switch
Note: The 1000 Mbps Gigabit Ethernet port always operates at full-duplex mode.

Verifying Installation

Verify network communications by ensuring that all the necessary connections have been made, that all connected resources can be accessed, and that the LED indicators on the switch are functioning properly. For additional information, refer to Chapter 5, Troubleshooting.
Chapter 5 Troubleshooting
This chapter provides information about troubleshooting the Model FS518 Fast Ethernet Switch. Table 5-1 lists symptoms, causes, and solutions of possible problems.

Table 5-1.

Symptom Power LED is off.
Troubleshooting Information

Cause Solution

10/100 buffer memory: Gigabit buffer memory: Forwarding modes: Network latency: Address database size: Addressing: 10/100 queue buffer:

Cable Specication

62.5/125 m multimode ber optic cable
Appendix B Connector Pin Assignments
This appendix provides information about the RJ-45 plug, the RJ-45 connector, and the ber connector used for the NETGEAR Model FS518 Fast Ethernet Switch with Gigabit uplinks.
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; it supports 10 Mbps or 100 Mbps data transmission. The RJ-45 plug and vista RJ-45 connector are both illustrated in Figure B-1.

12345678

Key: 1 to 8 = pin numbers

Figure B-1.

RJ-45 Plug and Vista RJ-45 Connector with Built-In LEDs
Connector Pin Assignments
Table B-1 lists the pin assignments for the RJ-45 plug and the vista RJ-45 connector.

Table B-1.

Pin 4, 5, 7, 8
RJ-45 Plug and Vista RJ-45 Connector Pin Assignments
Normal Assignment on Ports 1 to 8 Input Receive Data + Input Receive Data Output Transmit Data + Output Transmit Data Uplink Assignment on Port 8 Output Transmit Data + Output Transmit Data Input Receive Data + Input Receive Data
Internal termination, not used for data transmission
Duplex SC Plug and Duplex SC Connector
The duplex SC connector connects stations, hubs, and switches that support the 1000BASE-SX fiber interface. Each ber link needs a clearly dened, external crossover. In other words, the transmit port of one interface must be wired to the receive port of the opposite interface and vice versa. Fiber cables must be connected in this manner to transmit and receive data. The duplex SC connector and duplex SC plug are illustrated in Figure B-2.

8895FA

Figure B-2.
Duplex SC Connector and Duplex SC Plug Connection
Appendix C Cabling Guidelines
This appendix provides specications for cables used with the Model FS518 Fast Ethernet Switch.
Fast Ethernet Cable Guidelines
Fast Ethernet uses UTP cable, as specied in the IEEE 802.3u standard for 100BASE-TX. The specication requires Category 5 UTP cable consisting of either two-pair or four-pair twisted insulated copper conductors bound in a single plastic sheath. Category 5 cable is certied up to 100 MHz bandwidth. 100BASE-TX operation uses one pair of wires for transmission and the other pair for receiving and for collision detection. When installing Category 5 UTP cabling, use the following guidelines to ensure that your cables perform to the following specications: Certication Make sure that your Category 5 UTP cable has completed the Underwriters Laboratories (UL) or Electronic Testing Laboratories (ETL) certication process. Termination method To minimize crosstalk noise, maintain the twist ratio of the cable up to the point of termination; untwist at any RJ-45 plug or patch panel should not exceed 0.5 inch (1.5 cm).

Cabling Guidelines

Category 5 Cable
Category 5 distributed cable that meets ANSI/EIA/TIA-568-A building wiring standards can be a maximum of 328 feet (ft) or 100 meters (m) in length, divided as follows: 20 ft (6 m) between the hub and the patch panel (if used) 295 ft (90 m) from the wiring closet to the wall outlet 10 ft (3 m) from the wall outlet to the desktop device
The patch panel and other connecting hardware must meet the requirements for 100 Mbps operation (Category 5). Only 0.5 inch (1.5 cm) of untwist in the wire pair is allowed at any termination point.
Category 5 Cable Specications
Ensure that the ber cable is crossed over to guarantee link. Table C-1 lists the electrical requirements of Category 5 UTP cable.

Table C-1.

Specication Number of pairs Impedance Mutual capacitance at 1 KHz
Electrical Requirements of Category 5 Cable
Category 5 Cable Requirements Four 100 15% 5.6 nF per 100 m
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.

Fiber Optic Cables

In North America, use EIA-569-A horizontal 62.5/125 m multimode optical ber cable (ANSI/EIA/TIA-492AAAA). Internationally, use ISO/IEC 11801 62.5/125 m multimode optical ber cable (IEC 793-2 type A1b, with 1.0 db/km attenuation and 500 MHz/km bandwidth). Refer to Table C-2 for the minimum requirements of ber optic cable.

Fiber Cable Specications

Table C-2 lists the electrical requirements of ber cable.

Table C-2.

Specication Number of strands Cable type Numerical aperture Total link budget Modal band Zero dispersion wavelength Dispersion slope
Electrical Requirements of Fiber Optic Cable
Fiber Optic Cable Two 62.5/125 m multimode ber optic cable 0.db 500 MHz/km 1295 to 1365 nm < 0.093 ps/nm2-km

Gigabit Cable Guidelines

Table C-3 lists the distance limitations for Gigabit ber connections.
Table C-3. Gigabit Cable Guidelines
62.5/125 Micron 2 to 260 meters 50/125 Micron 2 to 525 meters
Multimode Fiber Operating Range

Numbers

10/100 Mbps ports, 2-Mbps LEDs, 2-5 full-duplex mode, 1-3
applications desktop switching, 3-2 segment switching, 3-3 autonegotiation, 5-2 installation in a rack, 4-3 on a at surface, 4-2 verifying, 4-6
LEDs (table), 2-4 Link LED, 2-5
cable Category 5, C-1, C-2, C-4 crossover twisted pair, C-3 ber optic, C-5 ber specications, C-5 guidelines, C-2 specications, C-2 straight-through twisted pair, C-3 termination method, C-1 connections to other devices, 4-5 crossover twisted pair cable, C-3 customer support, iv
MAC layer device, 1-3 MDI. See uplink MDI-X. See normal mounting brackets, 4-3
network access speed, 2-2 normal ports, 2-3 wiring, 2-3, B-2, C-3 Normal/Uplink push button, 1-4, 2-1
desktop switching, 1-2, 3-2
FDX LED, 2-5 features, 1-4 ber optic cable, C-5 front panel, 2-1
package contents, 4-1 patch panel, C-2, C-4 ports, 2-1, 2-2, 2-3 Power LED, 2-1, 2-5
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NETGEAR FS518T 18 Port Fast Ethernet Switch (10/100/1000)
This NetGear FS500 Series Fast Ethernet switches provide powerful, network center performance. All its ports are capable of 10 or 100 Mbps, half- or full-duplex operation. It is ideal for segmenting networks into small, connected subnets for superior performance, enabling the most demanding multimedia and imaging applications over the network. Since each port individually senses and adjusts to the correct speed, it is ideal for networks in transition from 10 to 100 Mbps.Copper Gigabit ports in these Fast Ethernet switches provide you with the fastest and simplest way to move to Gigabit speeds. Instantly boost your network performance without the cost and hassle of fiber cables. Maintain your network infrastructure - including installed cabling, and desktop software and hardware. NetGear FS518T switch, with Plug and Play installation, delivers the power of Gigabit Ethernet over copper to speed up server and backbone access for your small business or branch office. Low Price - Click Now!