NETGEAR FS 726 User manual

FS
MODEL
726
FS
MODEL
750
Modular Fast Ethernet Switch
User‘s Guide

ii
Trademarks
NETGEAR® is a registered trademark of NETGEAR, Inc. in the United States and other countries. All other
trademarks and registered trademarks are the property of their respective owners.
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.
Certificate of the Manufacturer/Importer
It is hereby certified that the NETGEAR Model FS726 Modular Fast Ethernet Switch and Model FS750
Modular Fast Ethernet Switch have been suppressed in accordance with the conditions set out in the BMPT-
AmtsblVfg 243/1991 and Vfg 46/1992.The operation of some equipment (for example, test transmitters) in
accordance with the regulations may, however, be subject to certain restrictions. Please refer to the notes in
the operating instructions.
Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the
market and has been granted the right to test the series for compliance with the regulations.
Voluntary Control Council for Interference (VCCI) Statement
This equipment is in the first category (information equipment to be used in commercial and/or industrial
areas) and conforms to the standards set by the Voluntary Control Council for Interference by Data
Processing Equipment and Electronic Office Machines that are aimed at preventing radio interference in com-
mercial and/or industrial areas.
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio interfer-
ence may be caused to equipment such as radios andTV receivers.
Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause
undesired operation.
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 in a residential installation.This equipment generates, uses, and can radiate radio fre-

iii
quency energy and, if not installed and used in accordance with the instructions,may cause harmful interfer-
ence to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
EN 55024 Declaration of Conformity
This is to certify that the NETGEAR Model FS726 Modular Fast Ethernet Switch and Model FS750
Modular Fast Ethernet Switch are 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
55024 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.
Canadian Department of Communications Radio Interference Regulations
These digital apparatuses (NETGEAR Model FS726 Modular Fast Ethernet Switch and Model FS750 Modular
Fast Ethernet Switch) do 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.
Règlement sur le brouillage radioélectrique du ministère des Communications
Ces appareils numériques (NETGEAR Model FS726 Modular Fast Ethernet Switch et Model FS750
Modular Fast Ethernet Switch) respectent les limites de bruits radioélectriques visant les appareils
numériques de classe A prescrites dans le Règlement sur le brouillage radioélectrique du ministère des
Communications du Canada.
!

iv
Customer Support
For assistance with installing and configuring your NETGEAR system or with questions or problems
following installation:
• Check the NETGEAR Web page at http://www.NETGEAR.com.
• CallTechnical Support in North America at 1-888-NETGEAR. Our technicians are standing by to assist
you 24 hours a day, 7 days a week.If you are outside North America,please refer to the phone numbers
listed on the Support Information Card that shipped with your switch.
• E-mail Technical Support at [e-mail].
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 uniform 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.

vContents
CONTENTS
CHAPTER 1
Introduction 1-1
Description 1-1
Features 1-2
Key Features 1-2
Additional Features 1-3
Package Contents 1-5
CHAPTER 2
Physical Description 2-1
Front and Back Panels 2-1
10/100 Mbps RJ-45 Ports 2-3
LED Mode Button and LED Descriptions 2-4
Module Bays 2-5
Auto Uplink 2-5
Reset Button 2-7
CHAPTER 3
Applications 3-1
Desktop Switching 3-1
Segment Switching and Bridging from 10 Mbps to 100 Mbps 3-2
Media Compatibility and Conversion 3-2
CHAPTER 4
Installation 4-1
Preparing the Site 4-2
Installing the Switch 4-3
Installing the Switch on a Flat Surface 4-3
Installing the Switch in a Rack 4-3
Connecting Devices to the Switch 4-4
Using Gigabit Ethernet Modules 4-5
Checking the Installation 4-6
Applying AC Power 4-6

contents vi
CHAPTER 5
Troubleshooting Information 5-1
AdditionalTroubleshooting Suggestions 5-3
Network Adapter Cards 5-3
Configuration 5-3
Switch Integrity 5-3
Auto Negotiation 5-3
APPENDIX A
Technical Specifications A-1
Network Protocol and Standards Compatibility A-1
Data Rate A-1
Interface A-1
Performance Specifications A-2
Bandwidth A-2
Electrical Specifications A-3
Power Consumption A-3
Physical Specifications A-3
Environmental Specifications A-3
Electromagnetic Emissions A-4
Electromagnetic Susceptibility A-4
Safety Agency Approvals A-4
APPENDIX B
Connector Pin Assignments B-1
RJ-45 Plug and RJ-45 Connector B-1
Duplex SC Plug and Duplex SC Connector B-3

viicontents
APPENDIX C
Cabling Guidelines C-1
Fast Ethernet Cable Guidelines C-1
Category 5 Cable C-2
Category 5 Cable Specifications C-3
Twisted Pair Cables C-3
Patch Panels and Cables C-5
Using 1000BASE-T Gigabit Ethernet over Category 5 Cable C-5
Overview C-5
Cabling C-6
Length C-6
Return Loss C-6
Near End Crosstalk (NEXT) C-7
Patch Cables C-7
Conclusion C-7
Fiber Optic Cables C-8
Fiber Cable Specifications C-8
Gigabit Cable Guidelines C-8
INDEX I-1
FIGURES

figures viii
Figure 1-1. Package Contents 1-5
Figure 2-1. Front and Back Panels of the FS726 Switch 2-2
Figure 2-2. Front and Back Panels of the FS750 Switch 2-3
Figure 2-3. Creating Redundant Paths between
Network Devices (Example 1) 2-6
Figure 2-4. Creating Redundant Paths between
Network Devices (Example 2) 2-6
Figure 3-1. Example of Desktop Switching 3-1
Figure 3-2. Example of Segment Switching and Bridging 3-2
Figure 3-3. Example of Media Compatibility
and Conversion 3-3
Figure 4-1. Attaching Mounting Brackets 4-3
Figure 4-2. Connecting Devices to the Switch 4-4
Figure B-1. RJ-45 Plug and RJ-45 Connector
with Built-in LEDs B-1
Figure B-2 Duplex SC Cconnector and Duplex SC Plug B-3
Figure C-1. Straight-ThroughTwisted-Pair Cable C-4
Figure C-2. CrossoverTwisted-Pair Cable C-4
Figure C-3. Category 5 UTP Cable with
Male RJ-45 Plug at Each End C-5
TABLES

ixtables
Table 1-1. Key Features 1-2
Table 2-1. Front Panel LEDs 2-4
Table 4-1. Site Requirements 4-2
Table 5-1. Troubleshooting Information 5-1
Table B-1. 10/100 Mbps RJ-45 Plug and
RJ-45 Connector Pin Assignments B-2
Table B-2. 100/1000 Mbps RJ-45 Plug and
RJ-45 Connector Pin Assignments B-2
Table C-1. Electrical Requirements
of Category 5 Cable C-3
Table C-2. Electrical Requirements of
Fiber Optic Cable C-8
Table C-3. Gigabit Cable Guidelines C-8

1-1introduction
CHAPTER 1: INTRODUCTION
This installation guide describes the NETGEAR FS726 and FS750 Modular Fast
Ethernet Switches.
NETGEAR’s FS726 and FS750 are expandable, high-performance, IEEE-compliant
network switches designed for users who require a large number of ports and want the
high-speed capability of 10/100 switching to eliminate bottlenecks, boost performance,
and increase productivity. Both switches are designed with front module bays that will
accommodate either copper gigabit modules or fiber gigabit modules for high-speed
connection to a server or your network backbone.Built-in modularity gives you the flex-
ibility to buy according to your immediate needs,then add to your system later.You can
purchase the optimal combination of copper and fiber gigabit modules for your network
– both the same or one of each, as either will function in each module bay.To simplify
installation, both switch models are shipped ready for use,with no configuration
required. Everything necessary for setup comes in the box.
This chapter provides the following information:
• Description
• Features
• Package contents
Description
NETGEAR’s FS726 and FS750 Modular Fast Ethernet Switches are flexible, powerful,
and easy-to-use network solutions.Both switches have two front panel module bays that
can be used with gigabit uplinks to create a high-performance backbone connection.
Each module bay accepts either a copper Gigabit Ethernet module (1000BASE-T,

introduction 1-2
NETGEAR Model AG711T) or a fiber Gigabit Ethernet module (1000BASE-SX,
NETGEAR Model AG711F). (Modules are not included with the switches.) With the
advantage of this modularity you can:
• Connect switches to each other with high-speed links
• Link up to high-speed servers
• Connect fiber and copper networks
The NETGEAR FS726 Switch provides 24 shielded RJ-45 network ports, while the
NETGEAR FS750 Switch provides 48 shielded RJ-45 network ports. All RJ-45 ports
on the FS726 and FS750 Switches automatically negotiate to the highest speed,
making the switches ideal for environments that have a mix of Ethernet and Fast
Ethernet devices.In addition, all 10/100 Mbps ports operate in half- or full-duplex
mode,increasing the maximum bandwidth of each connection up to 20 Mbps or 200
Mbps, respectively. Both switch models support automatic address learning and IEEE
802.3x-compliant flow control to ensure optimal packet reliability.
The FS726 and FS750 Switches can be free-standing or rack mounted in a wiring
closet or equipment room.
Features
The following sections describe the characteristics of NETGEAR’s FS726 and
FS750 Switches.
Key Features
Table 1-1 summarizes the key features of the FS726 and FS750 Switches.
Table 1-1.Key Features:
Feature FS726 Switch FS750 Switch
Number of 10/100 Mbps RJ-45 ports per switch: 24 48
Number of module bays per switch: 2 2

1-3introduction
Additional Features
The FS726 and FS750 Switches share the following features:
• Uplink adaptability for either copper gigabit or fiber gigabit modules
• Auto UplinkTM to automatically configure the RJ-45 ports for use with either
straight-through or crossover cables to make the right connection
• Non-blocking, wire-speed filtering and forwarding of the traffic on all ports
• Scalability to meet your growing network needs,enabling performance to keep pace
with port density
• High-speed bandwidth over uplink connections
• Easy Plug-and-Play installation with no software to configure, for quick and easy
connection to new or existing 10 and 100 Mbps users and services
• Store-and-forward intelligent processing to remove erroneous packets from
the network
• Automatic address-learning function to build the packet-forwarding information table.
The table contains up to 8,000 media access control (MAC) addresses (that is, the
switch can support networks with as many as 8,000 devices).
• Link speed auto-sensing (10 or 100 Mbps) and duplex mode auto-sensing (half- or
full-duplex) to optimize connectivity and allow companies to migrate to Fast Ethernet
one port at a time
• Full-duplex mode to double throughput of point-to-point connections by enabling
individual ports to transmit and receive data concurrently
• IEEE 802.3x-compliant flow control to prevent dropped packets due to network
back-ups and bottlenecks

introduction 1-4
• Compliance with the IEEE802.3i Ethernet, IEEE802.3u Fast Ethernet standards,
IEEE802.3ab Gigabit Ethernet, and IEEE802.3z Gigabit Ethernet.
• LED indicators to show link,speed, activity, collision, and duplex for switch status
and troubleshooting.
• Rack Mount Kit for installing the switch in a standard 19-inch equipment rack

1-5introduction
Package Contents
Figure 1-1 shows the package contents of the FS726 and FS750 switches.
Figure 1-1.Package Contents
Verify that your package contains the following:
• FS726 or FS750 Switch
• Rubber footpads for tabletop installation
• Power cord
• Rack-mount kit for installing the switch in a 19-inch rack
• NETGEAR FS726 and FS750 Modular Fast Ethernet Switch User’s Guide
• Support Information Card
• Warranty & Owner Registration Card
If any item is missing or damaged, contact your place of purchase immediately.
Rubber
footpads
AC
power
cord
Rack-mount
kit
Installation Guide
Warranty
Owner Registration Card
Support Information Card
Model FS726 or Model FS750 Switch
(Model FS726 shown)

2-1physical description
CHAPTER 2: PHYSICAL DESCRIPTION
This chapter describes the hardware features of the FS726 and FS750 Switches.
Topics include:
• Front and back panels
• 10/100 Mbps RJ-45 ports
• LED Mode button and LEDs
• Module bays (for copper or fiber Gigabit Ethernet modules)
• Auto Uplink
• Reset button
Front and Back Panels
Figure 2-1 shows the key components on the front and back panels of the FS726
Switch. Figure 2-2 shows the key components on the front and back panels of the
FS750 Switch.
The front panel of each switch contains a reset button, an LED Mode push button for
alternating LED readout categories, Link LEDs, Mode LEDs, RJ-45 jacks, and two
module bays for installing Gigabit Ethernet modules.Both the FS726 Switch and the
FS750 Switch support Auto Uplink technology, eliminating the need for a
Normal/Uplink push button.
The back panel of each switch has fans for cooling, and a standard AC power
receptacle for accommodating the supplied power cord.

physical description 2-2
Figure 2-1.Front and Back Panels of the FS726 Switch
10/100 Mbps
ports Module Bays
LED Mode
Button Reset Button
Fan Power
Receptacle
Front Panel of the Model FS726 Switch
Rear Panel of the Model FS726 Switch
Link LEDs Mode LEDs
Power
LED

2-3physical description
Figure 2-2.Front and Back Panels of the FS750 Switch
10/100 Mbps RJ-45 Ports
As Figures 2-1 and 2-2 show, the FS726 Switch has 24 RJ-45 ports, while the FS750
Switch has 48 RJ-45 ports.These are auto-sensing 10/100 Mbps ports: when you
insert a cable into an RJ-45 port, the switch automatically detects the maximum speed
(10 or 100 Mbps) and duplex mode (half- or full-duplex) of the attached device, and
displays this information using the front panel 100 Mbps and FDX LEDs for that port
(LEDs are described in the next section).The 10/100 Mbps ports support only unshield-
ed twisted-pair (UTP) cable terminated with an 8-pin RJ-45 plug.
10/100 Mbps
ports
Front Panel of the Model FS750 Switch
Rear Panel of the Model FS750 Switch
Module Bays
LED Mode
Button Reset Button
Power
LED
Link LEDs Mode LEDs

physical description 2-4
LED Mode Button and LED Descriptions
LEDs on the front panels of the FS726 and FS750 Switches provide a quick and
accurate display of port operation. Users can clearly identify the status of each port
for link and by toggling the LED Mode button through the associated categories speed,
activity, collision, and duplex mode .
Table 2-1 summarizes the LEDs on the FS726 and FS750 Switches. A detailed
description of the LEDs follows the table.
Table 2-1.Front Panel LEDs
Label Color Activity Description
Power Green On Power is supplied to the switch.
Off Power is disconnected
Link Green On Port has a valid link connection.
Off A valid link has not been established on the port.
Mode in: Max Spd
10/100 Mbps Port Green On Port has made a 100 Mbps connection.
Off Port has made a 10 Mbps connection.
Module Bay Port Green On Port has a valid 1000 Mbps (1 Gbps) link connection
Off A valid link has not been established on the port.
Mode in: Activity /
Collision Green Blinking Data transmission is occurring on the port.
Yellow Blinking Data collision is occurring on the port.The rate at
which this LED blinks corresponds to the number of
collisions.When a collision occurs, the connected
device pauses and transmits again after waiting a
specified time.
Mode in: FDX Green On Port is operating in full-duplex mode.
Yellow On Port is operating in half-duplex mode.

2-5physical description
Module Bays
Two module bays on both switches allow you to upgrade as you go,whether you need
gigabit uplink or additional port capacity. Each module bay will accept either a copper
Gigabit Ethernet module (1000BASE-T, NETGEAR Model AG711T) or a fiber Gigabit
Ethernet module (1000BASE-SX, NETGEAR Model AG711F) for high-speed connec-
tion to a server, to connect fiber and copper networks, or to extend your network back-
bone with high-speed links.
Auto Uplink
To simplify the procedure for attaching devices,all RJ-45 ports on the FS726 and
FS750 Switches support Auto Uplink.This technology allows you to attach devices to
the RJ-45 ports using either straight-through or crossover cables.When you insert a
cable into the switch’s RJ-45 port, the switch automatically:
• Senses whether the cable is a straight-through or crossover cable, and
• Determines whether the link to the attached device requires a "normal" connection
(such as when connecting the port to a PC) or an "uplink" connection (such as when
connecting the port to a router, switch, or hub).
After detecting this information, the switch automatically configures the RJ-45 port to
enable communications with the attached device, without requiring user intervention.In
this way, the Auto Uplink technology compensates for setting uplink connections, while
eliminating concern about whether to use crossover or straight-through cables when
attaching devices.
Note: Using Auto Uplink to create multiple active paths between any two
network devices can cause undesirable loops in the network, resulting in an
endless broadcast traffic that disables your network. Loops occur when there are
alternate routes between two network devices.In Figure 2-3,for example, a
loop is created by connecting two RJ-45 ports on an FS726 Switch to a
router containing a 4-port switch. Figure 2-4 shows another scenario where a
router with a 4-port switch connects to a hub and to a FS726 Switch; the hub
and switch, in turn, connect back to the same router, creating multiple active
paths between all three devices.

physical description 2-6
Model S726 Switch
EN524 Hub
R314 Router
Model S726 Switch
R314 Router
Figure 2-3.Creating Redundant Paths between Network Devices (Example 1)
Figure 2-4.Creating Redundant Paths between Network Devices (Example 2)