NETGEAR GS516TNA User manual

R
Copper Gigabit Switch
Installation Guide
16 PORT
10/100/1000 Mbps
GS 516T
MODEL

ii
© 2001 by NETGEAR, Inc. All rights reserved.
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 perspective 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 GS516T Copper Gigabit Switch has been suppressed in
accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992.The opera-
tion 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
commercial and/or industrial areas.
Consequently, when this equipment is used in a residential area or in an adjacent area thereto, radio inter-
ference may be caused to equipment such as radios and TV receivers.

iii
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 pro-
tection against harmful interference in a residential installation.This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance with the instruc-
tions, may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interfer-
ence 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 55 022 and EN 55 024 Statements
This is to certify that the Model GS516T Copper Gigabit 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 55 022 Class A (CISPR 22) and EN 55 024.
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
This digital apparatus (NETGEAR Model GS516T Copper Gigabit 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.
Règlement sur le brouillage radioélectrique du ministère des Communications
Cet appareil numérique (NETGEAR Model GS516T Copper Gigabit Switch) respecte 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.
•Call Technical Support at the phone number listed on the Support Information Card that shipped with
your switch.
•Email 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 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 v
CONTENTS
CHAPTER 1
Introduction
Features 1-1
Package Contents 1-2
CHAPTER 2
Physical Description
Front Panel 2-1
RJ-45 2-2
Auto-uplinkTM 2-2
LEDs 2-4
Rear Panel 2-4
CHAPTER 3
Applications
Desktop Switching 3-1
Segment Switching and Bridging from 10 Mbps or 100 Mbps
to 1000 Mbps 3-2
CHAPTER 4
Installation
Preparing the Site 4-1
Installing the Switch on a Flat Surface 4-2
Installing the Switch in a Rack 4-2
Connecting Devices to the Switch 4-2
Verifying Installation 4-3
CHAPTER 5
Troubleshooting

contents vi
APPENDIX A
Technical Specifications B-1
APPENDIX B
Connector Pin Assignments
RJ-45 Plug and RJ-45 Connector B-1
APPENDIX C
Cabling Guidelines
Using 1000BASE-T Gigabit Ethernet over Category 5 Cable C-1
Overview C-1
Cabling C-1
Length C-1
Return Loss C-2
Near End Cross Talk (NEXT) C-2
Patch Cables C-3
Conclusions C-3
Fast Ethernet Cable guidelines C-3
Category 5 Cable C-4
Category 5 Cable Specifications C-4
Twisted Pair Cables for 1000BASE-TX C-5
Patch Panel and cables C-6

contents vii
FIGURES
Figure 1-1. Model GS516T Switch Package Contents 1-2
Figure 2-1. Front Panel of the Model GS516T Switch 2-1
Figure 2-2. Rear Panel of the Model GS516T Switch 2-2
Figure 2-3. Warning! Creating loops disables your network
(Example 1) 2-3
Figure 2-4. Warning! Creating loops disables your network
(Example 2) 2-3
Figure 3-1. Model GS516T Switch Used as a Desktop Switch 3-1
Figure 3-2. Model GS516T Switch Used as a Segment Switch 3-2
Figure 4-1. Attaching Mounting Brackets 4-2
Figure 4-2. Connecting to the Model GS516T Switch 4-3
Figure B-1. RJ-45 Plug and RJ-45 Connector
with Built-in LEDs B-1
Figure C-1. Straight-through Twisted Pair Cable C-5
Figure C-2. Crossover Twisted Pair Cable C-5
Figure C-3. Category 5e UTP Patch Cable with
Male RJ-45 Plug at Each End C-6

contents viii
TABLES
Table 2-1. LED Descriptions 2-4
Table 4-1. Operating Environment Requirements 4-1
Table 5-1. Troubleshooting Information 5-1
Table B-1. 10/100/1000 Mbps RJ-45 Plug and RJ-45
Connector Pin Assignments B-2
Table C-1. Electrical Requirements of Category 5 Cable C-4

introduction 1-1
CHAPTER 1: INTRODUCTION
The NETGEAR Model GS516T 16-Port Copper Gigabit Switch provides you with a
low-cost, high-performance network solution and is designed to anchor and intercon-
nect 10/100/1000 megabits per second (Mbps) workgroups using copper Gigabit links.
Features
The Model GS516T switch has the following key features:
•16 full-duplex copper Gigabit ports with standard RJ-45 connectors
•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).
•Address aging function to automatically track changes in network configuration
•Protocol independence and compatibility with all common protocols, such as
TCP/IP, Netware, DECNet, Microsoft Networks, and AppleTalk
•Full-duplex mode to double throughput of point-to-point connections by letting indi-
vidual ports transmit and receive concurrently when the other end also supports
full-duplex mode
•Wire-speed filtering and forwarding of the traffic
•Store-and-forward intelligent processing to minimize erroneous packets on the net-
work
•Easy Plug and Play installation with no software to configure, which saves time and
minimizes the potential for configuration errors
•Auto UplinkTM in all ports to make the right connection
•Auto-negotiation with link partners to speeds of 10, 1000, or 1000Mbps on all
ports
•Flow control traffic management to ensure no packets are dropped if there are
back-ups or bottlenecks in the network
R

introduction 1-2
Package Contents
Figure 1-1 illustrates the Model GS516T switch package contents.
Figure 1-1. Model GS516T Switch Package Contents
Verify that your package contains the following:
•Model GS516T switch
•Rubber footpads for tabletop installation
•The Installation Guide
•Rack mount kit for 19-inch rack installation
•Warranty & Owner Registration Card
•Support Information Card
•Power cord
16 PORT
GS516T
8
16
1
9
1234
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5678
91011
12 13 14 15 16

physical description 2-1
CHAPTER 2: PHYSICAL DESCRIPTION
This chapter describes the hardware features of the NETGEAR Model GS516T Copper
Gigabit Switch.
Front Panel
The front panel of the Model GS516T switch contains the following LEDs that corre-
spond to each network port: FDX/COL (full-duplex/collision), Activity(RX/TX)/10Mbps .
Each network port has its own link and speed LEDs (located above each port).
Figure 2-1. Front Panel of the Model GS516T Switch
16 PORT
GS516T
8
16
1
9
123 4
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5678
91011
12 13 14 15 16
Link and Speed LEDs

physical description 2-2
RJ-45 Ports
The Model GS516T switch has 16 auto-sensing 10/100/1000 Mbps UTP ports.
Each port can operate at 1000 Mbps full-duplex mode, 100 Mbps full/half duplex
mode, or 10Mbps full/half duplex mode, and provide a standard UTP for Category 5
or Category 5e cable. Figure 2-2 shows a RJ-45 connector. For further information
about Category 5 cables and connectors, refer to Appendix B,“Connector Pin
Assignments,”and Appendix C, “Cabling Guidelines.”The 1000BASE-T requires
very careful cable installation.
Key:
1 = 1000M Link LED
2 = 100M Link LED
Figure 2-2. RJ-45 Connector with Built-in LEDs
Auto Uplink
To simplify the procedure for attaching devices, all RJ-45 ports on the GS516T
Switch 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 interven-
tion. In this way, the Auto Uplink technology compensates for setting uplink connec-
tions, while eliminating concern about whether to use crossover or straight-through-
cables when attaching devices.
735EA
1 2

physical description 2-3
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 con-
necting two RJ-45 ports on a GS516T Switch to a router containing a 4-port
switch. Figure 2-4 shows another scenario where a router with a 4-port switch con-
nects to a hub and to a GS516T Switch; the hub and switch, in turn, connect back
to the same router, creating multiple active paths between all three devices.
Figure 2-3. Warning! Creating loops disables your network(Example 1)
Figure 2-4. Warning! Creating loops disables your network(Example 2)

Model GS516T
FR314 Router
16 PORT
GS516T
8
16
1
9
1234
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5678
91011
12 13 14 15 16
"
Figure 2-5
FR314 Router

Model GS516T
FS509T
MODEL
9
PORTS
Fast Ethernet Switch
with Ports
10/100Mbps
Switching
Power 9
23416785
Activity
Green = FDX, Yellow = C L
100M 10M n = Link 1000M 100M
987654321
1000M 100M
®
n = Link
EN524 Hub
EN524
MODEL
®

physical description 2-4
100-240 VAC 50-60 Hz
AC power Receptacle
Fans
LEDs
Table 2-1 describes the activity of the LEDs.
Table 2-1. LED Descriptions
Label Color Activity Description
Power Green On Power is supplied to the switch.
Off Power is disconnected.
FDX/COL Green On The port is operating in full-duplex mode.
Off The port is operating in half-duplex mode.
Yellow Blinking Data collisions are occurring on the port. In a full-duplex
environment, there is no collision. In a half-duplex environment,
some collisions are normal.
Activity/ Green Blinking Packet transmission or reception is occurring on the port.
10M On A valid 10 Mbps link is established on the port.
Off No Activity on the port.
1000M Green On A valid 1000 Mbps link is established on the port.
Off A link is not established on the port.
100M Green On A valid 100 Mbps link is established on the port.
Off A link is not established on the port.
Rear Panel
As illustrated in Figure 2-5, the rear panel of the Model GS516T switch has fans for cool-
ing and a standard AC Power Receptacle for the supplied power cord.
Figure 2-5. Rear Panel of the Model GS516T Switch

applications 3-1
CHAPTER 3: APPLICATIONS
This chapter presents an overview of the levels of service provided by incorporating
the technology of the NETGEAR Model GS516T Copper Gigabit Switch into your
network.
Desktop Switching
Figure 3-1 illustrates the Model GS516T switch, used as a desktop switch to build
a powerful network that enables users to have 1000 Mbps access to a file server.
If a full-duplex adapter card is installed in the server or PC, a 2000 Mbps connec-
tion will be provided to each server and PC.
Figure 3-1. Model GS516T Switch Used as a Desktop Switch
16 PORT
GS516T
8
16
1
9
1234
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5678
91011
12 13 14 15 16

applications 3-2
Segment Switching and Bridging from 10 Mbps or 100 Mbps to 1000 Mbps
The Model GS516T switch, as illustrated in Figure 3-2, connects multiple power
workgroups and servers using high-speed gigabit links. Each power workgroup is
anchored by a NETGEAR Model FS518T switch. Other workgroups are connected
by a NETGEAR FS524 switch. Because each copper link can be up to 100 m long,
these workgroups can be located on separate floors.
Figure 3-2. Model GS516T Switch Used as a Segment Switch
16 PORT
GS516T
1
9
1234
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5678
91011
12 13 14 15 16
MAC MAC

installation 4-1
CHAPTER 4: INSTALLATION
This chapter describes the installation procedures for the NETGEAR Model GS516T
Copper Gigabit Switch.
Preparing the Site
Before you begin installing your switch, prepare the installation site. Make sure your
operating environment meets the operating environment requirements of the equip-
ment listed in Table 4-1.
Table 4-1. Operating Environment Requirements
Characteristic Requirements
Temperature Ambient temperature between 0 and 40ºC (32 and 104ºF).
No nearby heat sources such as direct sunlight, warm air exhausts, or heaters.
Operating humidity Maximum relative humidity of 90%, noncondensing.
Ventilation Minimum 2 inches (5.08 cm) on all sides for cooling.
Adequate airflow in room or wiring closet.
Operating conditions At least 6 ft (1.83 m) to nearest source of electromagnetic noise
(such as photocopy machine or arc welder).
Power Adequate power source within 6 ft (1.83 m).
Checking Package Contents
Unpack the contents of the package and verify them against the following list:
•NETGEAR Model GS516T Gigabit Ethernet Switch
•Self-adhesive rubber footpads for desktop installation
•Rack Mount Kit for rack installation
•AC power cord
•Warranty & Owner Registration Card

installation 4-2
•The Installation Guide
•Support Information Card
Installing the Switch on a Flat Surface
To install the switch on a flat surface, be sure to attach the rubber footpads to the
bottom of the switch.
Installing the Switch in a Rack
Refer to Figure 4-1 when installing the switch in a rack.
Figure 4-1. Attaching Mounting Brackets
Connecting Devices to the Switch
To connect the switch:
1. Connect the devices to the network ports on the switch, using Category 5 (Cat5)
or Category 5e (Cat5e) UTP cable.
Note: Ethernet specifications limit the cable length between your PC or
server and the switch to 100 m.
2. Connect one end of the AC power adapter cable to the power receptacle on the
rear panel of the switch and the other end of the power adapter cable to
the wall outlet.
GS516T
MODEL
CopperGigabit Switch
100/1000Mbps
Power
Ethernet

installation 4-3
Refer to Figure 4-2 when connecting the switch.
Figure 4-2. Connecting to the Model GS516T Switch
Verifying Installation
When power has been applied to the switch, verify that:
•The green power LED on the front panel is on.
•The green link LED on each connected port is on.
When the switch is connected and operating, refer to Table 2-1 “LED Descriptions”
for information about the LEDs and their activity.
GS508T
MODEL
GigabitFiberSwitch
16PORT
10/100Mbps
Ethernet
1000 Mbps
100 Mbps
10 Mbps
Key

CHAPTER 5: TROUBLESHOOTING
This chapter provides information about troubleshooting the NETGEAR Model
GS516T Copper Gigabit Switch. Table 5-1 lists symptoms, causes, and solutions of
possible problems.
Table 5-1. Troubleshooting Information
Symptom Cause Solution
Power LED is off. No power is received Check the power cord connections for the switch
at the switch. and the connected device.
Make sure all cables used are correct and comply
with Ethernet specifications.
1000M or 100M Port connection is Check the crimp on the connectors and make
LED is off or not functioning. sure that the plug is properly inserted and
intermittent. locked into the port at both the switch and the
connecting device.
Make sure all cables used are correct and comply
with Ethernet specifications. See Appendix C.
Check for a defective adapter card, cable, or port
by testing them in an alternate environment where
all products are functioning.
File transfer is slow Half- or full-duplex Make sure the remote link partner is set to
or performance setting on the switch auto negotiate.
degradation is and the connected
a problem. device are not the same.
A segment or device One or more devices Verify that the cabling is correct. Be sure all
is not recognized as are not properly cable connectors are securely positioned in the
part of the network. connected, or cabling required ports. Equipment may have been
does not meet accidentally disconnected.
Ethernet guidelines.
COL LED is Collisions are Some collisions are normal when the connection
blinking yellow occurring on the is operating in half-duplex mode.
excessively. connected segment.
Duplex modes are Recheck the link partner settings.
mismatched.
troubleshooting 5-1