NETGEAR GS748Tv4 Manual

February 2011
202-10725-01
v1.0
350 East Plumeria Drive
San Jose, CA 95134
USA
GS748T Smart Switch
Hardware Installation Guide

2 |
GS748T Smart Switch Hardware Installation Guide
©2011 NETGEAR, Inc. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated
into any language in any form or by any means without the written permission of NETGEAR, Inc.
Technical Support
Thank you for choosing NETGEAR. To register your product, get the latest product updates, or get support online,
visit us at http://support.netgear.com.
Phone (US & Canada only): 1-888-NETGEAR
Phone (Other Countries): See Support information card.
Trademarks
NETGEAR, the NETGEAR logo, ReadyNAS, ProSafe, Auto Uplink, X-RAID2, and NeoTV are trademarks or
registered trademarks of NETGEAR, Inc. Microsoft, Windows, Windows NT, and Vista are registered trademarks
of Microsoft Corporation. Other brand and product names are registered trademarks or trademarks of their
respective holders.
Statement of Conditions
To improve 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.
Revision History
Publication Part Number Version Publish Date Comments
202-10725-01 v1.0 February 2011 Document Created

Table of Contents |3
Table of Contents
Chapter 1 Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2 Physical Description
GS748T Front-Panel and Back-Panel Configuration. . . . . . . . . . . . . . . . . 11
LED Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Port LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
System LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Device Hardware Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
RJ-45 Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SFP Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Factory Defaults Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 3 Applications
Desktop Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Backbone Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 4 Installation
Step 1: Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Step 2: Installing the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Installing the Switch on a Flat Surface. . . . . . . . . . . . . . . . . . . . . . . . . . 22
Installing the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Step 3: Checking the Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Step 4: Connecting Devices to the Switch. . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 5: Installing an SFP Transceiver Module . . . . . . . . . . . . . . . . . . . . . 25
Step 6: Applying AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Step 7: Managing the Switch using a Web Browser or the PC Utility . . . . 27

GS748T Smart Switch Hardware Installation Guide
4 | Table of Contents
Appendix A Troubleshooting
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Additional Troubleshooting Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . .31
Network Adapter Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Switch Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Auto-Negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Appendix B Technical Specifications
Appendix C Notification of Compliance
Index

GS748T Smart Switch Hardware Installation Guide
Table of Contents |5

Chapter 1: Introduction |6
1. Introduction 1
Congratulations on the purchase of your NETGEAR®ProSafeTM GS748T Gigabit Smart
Switch! Your GS748T switch is a state-of-the-art, high-performance, IEEE-compliant network
solution designed for users who require a large number of ports and want the power of
Gigabit connectivity to eliminate bottlenecks, boost performance, and increase productivity.
There are 48 twisted-paired ports with 4 SFP GBIC slots (two SFP slots are combo ports) on
the front panel of the switch which support non-stop 10/100/1000 networks. To simplify
installation, the switch is shipped ready for use out of the box.
The GS748T Smart Switch Hardware Installation Guide describes how to install and power
on the GS748T. The information in this manual is intended for readers with intermediate
computer and Internet skills.
This chapter serves as an introduction to the GS748T and provides the following information:
• Overview
• Features
• Package Contents

Chapter 1: Introduction |7
GS748T Smart Switch Hardware Installation Guide
Overview
The NETGEAR GS748T Gigabit Smart Switch provides 48 twisted-pair ports with four built-in
Small Form Factor (SFP) GBIC slots that support nonstop 1000M fiber networks.
Using these Gigabit slots, you can create high-speed connections to a server or network
backbone. For example, you can:
• Connect switches to each other with high-speed links
• Link to high-speed servers
• Provide 10/100/1000M copper and 1000M fiber connectivity
The NETGEAR GS748T Gigabit Smart Switch also provides the benefit of administrative
management with a complete package of features for the observation, configuration, and
control of the network. With a Web-based Graphical User Interface (GUI), the switch’s many
capabilities can be viewed and used in a simple and intuitive manner. The switch’s
management features include configuration for port and switch information, VLAN for traffic
control, port trunking for increased bandwidth, and Class of Service (CoS) for traffic
prioritization. These features provide better understanding and control of the network. Initial
discovery of the switch on the network requires the Smart Control Center program, a utility
that runs on a PC.
The NETGEAR GS748T Gigabit Smart Switch can be free standing or rack mounted in a
wiring closet or equipment room. It is IEEE-compliant and offers low latency for high-speed
networking. All ports can automatically negotiate to the highest speed. This capability makes
the switch ideal for environments that have a mix of Ethernet, Fast Ethernet, or Gigabit
Ethernet devices. In addition, all RJ-45 ports operate in half-duplex or full-duplex mode. The
maximum segment length is 328 feet (100 meters) over Category 5 Unshielded Twisted-Pair
(UTP) cable.

8| Chapter 1: Introduction
GS748T Smart Switch Hardware Installation Guide
Features
The following list identifies the key features of the GS748T:
• Forty-eight 10/100/1000 Mbps auto-sensing Gigabit-Ethernet switching ports.
• Two SFP combo ports.
• Two dedicated 1000M SFP fiber ports.
• Full NETGEAR Smart Switch functionality.
• Full compatibility with IEEE standards:
• IEEE 802.3i (10BASE-T)
• IEEE 802.3u (100BASE-TX)
• IEEE 802.3ab (1000BASE-T)
• IEEE 802.3z (1000BASE-x)
• IEEE 802.3x (Full-duplex flow control)
• Autosensing and auto-negotiating capabilities for all ports.
• Auto Uplink™ on all ports to make the right connection.
• Automatic address learning function to build the packet-forwarding information table. The
table contains up to 8K Media Access Control (MAC) addresses.
• Store-and-Forward transmission to remove bad packets from the network.
• Full-duplex IEEE 802.3x pause frame flow control.
• Active flow control to minimize packet loss and frame drops.
• Half-duplex backpressure control.
• Per port LEDs and power LED.
• Internal power supply.
• Standard NETGEAR 7xx series chassis.
• NETGEAR Green product series power-saving features:
• Automatic power consumption adjustment based on the RJ-45 cable length.
• Per port automatic power down when the port link is down.

Chapter 1: Introduction |9
GS748T Smart Switch Hardware Installation Guide
Package Contents
Figure 1 shows the package contents of the GS748T Gigabit Smart Switch.
Figure 1. Package Contents
Verify that the package contains the following:
• GS748T Gigabit Smart Switch
• Rubber footpads for tabletop installation
• Rackmounting kits
• Power cord
• Installation guide
• Smart Switch Resource CD with NETGEAR Smart Control Center and User’s Manual
If any item is missing or damaged, contact the place of purchase immediately.
LED Link/Act Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Fact ory
Default
12345678910 11 12 221314 15 16 17 1819 20 21 2324 3425 26 27 2829 30313233 35363738 39 40 41 42 4344
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFP LED
GREEN=
1000Mbps
Blink=ACT
48T
47T

Chapter 2: Physical Description |10
2. Physical Description 2
This chapter describes the GS748T Gigabit Smart Switch hardware features. Topics include:
• GS748T Front-Panel and Back-Panel Configuration
• LED Designations
• Device Hardware Interfaces

Chapter 2: Physical Description |11
GS748T Smart Switch Hardware Installation Guide
GS748T Front-Panel and Back-Panel Configuration
The GS748T has 48 10/100/1000 Mbps copper ports, two 1000 Mbps SFP combo ports, and
two dedicated 1000 Mbps SFP fiber ports. The SFP combo ports are shared with copper
ports 47 and 48. If the SFP combo ports are in use, copper ports 47 and 48 are inactive.
Each port is capable of sensing the line speed and negotiating the duplex mode with the link
partner automatically.
Figure 2 illustrates the front panel of the NETGEAR GS748T.
Figure 2. Front Panel
The front panel contains the following:
• 48 RJ-45 connectors for 10/100/1000 Mbps autosensing Gigabit Ethernet switching ports
• Two SFP combo Gigabit Ethernet switching ports
• Two dedicated 1000 Mbps SFP Gigabit Ethernet switching ports
• Reset button to restart the device
• Recessed default reset button to restore the device back to the factory defaults
• Link, Speed, and Activity LEDs for each port
• Power and Status LED
Figure 3 illustrates the NETGEAR GS748T back panel.
Figure 3. Back Panel
The back panel contains a power connector.
LED Link/Act Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Fact ory
Default
12345678910 11 12 221314 15 16 17 1819 20 21 2324 3425 26 27 2829 30313233 35363738 39 40 41 42 4344
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFP LED
GREEN=
1000Mbps
Blink=ACT
48T
47T
Power/Status LED
Link/Speed/ACT LEDs
10/100/1000 Ethernet Ports
1000M
SFP Ports
1000M SFP
Combo Ports
Reset Button
Factory Defaults
Button
Power Connector

12 | Chapter 2: Physical Description
GS748T Smart Switch Hardware Installation Guide
LED Designations
Port LEDs
The following table describes the RJ-45, combo, and dedicated SFP port LED designations.
There are two LEDs for each RJ-45 port. Each SFP port has its own indication LED.
System LED
The following table describes the system LED designations.
LED Designation
Link/Speed/ACT LED mode for
copper ports 1 to 48:
• Off—No link established.
• Solid Green—A valid 1000 Mbps link is established.
• Blinking Green—The port is transmitting or receiving packets at
1000 Mbps.
• Solid Yellow—A valid 10/100 Mbps link is established.
• Blinking Yellow—The port is transmitting or receiving packets
at 10/100 Mbps.
If the media for ports 47 and 48 changes to SFP, the port LED for copper
ports 47 and 48 changes to off.
Link/ACT LED for SFP ports
47 to 50:
• Off—No SFP module link is established
• Solid Green—A valid 1000 Mbps SFP module link is established.
• Blinking Green— The port is transmitting or receiving packets
at 1000 Mbps.
If the media for ports 47 and 48 changes to copper, the port LED for the
SFP combo ports changes to off.
LED Designation
Power • Green—Device is powered on, run-time code is up and running
• Off—Power is not supplied to the device

Chapter 2: Physical Description |13
GS748T Smart Switch Hardware Installation Guide
Device Hardware Interfaces
RJ-45 Ports
RJ-45 ports are autosensing ports. When inserting a cable into an RJ-45 port, the switch
automatically ascertains the maximum speed (10, 100, or 1000 Mbps) and duplex mode
(half-duplex or full-duplex) of the attached device. All ports support only unshielded
twisted-pair (UTP) cable terminated with an 8-pin RJ-45 plug.
To simplify the procedure for attaching devices, all RJ-45 ports support Auto Uplink. This
technology allows attaching devices to the RJ-45 ports with either straight-through or
crossover cables. When inserting a cable into the switch’s RJ-45 port, the switch
automatically:
• Senses whether the cable is a straight-through or crossover cable.
• 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).
• 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.
SFP Ports
To enable you to have fiber connections on your network, there are four SFP ports that
accommodate standard SFP transceiver modules, which are sold separately. Two SFP ports
are combo ports and share connections with the last two RJ-45 ports. The SFP combo ports
and the shared RJ-45 ports are ports 47 and 48.
Only one type of connection of a combo port can be active at any time. For example, if SFP
port 48 is in use, copper port 48 is not active.
Note: If both connectors of a combo port are connected to other devices,
only the fiber port is active.
SFP ports 49 and 50 are dedicated SFP ports and are not combined with any RJ-45 ports.

14 | Chapter 2: Physical Description
GS748T Smart Switch Hardware Installation Guide
Reset Button
The Smart Switch has a Reset button on the front panel to allow you to manually reboot the
switch. This action is equivalent to powering the unit off and back on. The last saved
configuration is loaded into the switch as it resets. To operate the Reset button, insert a
device such as a paper clip into the opening to press the recessed button. The front-panel
LEDs should extinguish and light again as the switch performs its Power On Self Test
(POST).
Factory Defaults Button
The Smart Switch has a Factory Defaults button on the front panel so that you can remove
the current configuration and return the device to its factory settings. When you enable the
Factory Defaults button, all settings including the password, VLAN settings, and port
configurations are removed. To operate the Factory Defaults button, insert a device such as
a paper clip into the opening to press the recessed button for over two seconds.

Chapter 2: Physical Description |15
GS748T Smart Switch Hardware Installation Guide

Chapter 3: Applications |16
3. Applications 3
Your GS748T Gigabit Smart Switch is designed to provide flexibility in configuring your
network connections. It can be used as your only network traffic-distribution device or with 10
Mbps, 100 Mbps, and 1000 Mbps hubs and switches.

Chapter 3: Applications |17
GS748T Smart Switch Hardware Installation Guide
Desktop Switching
The GS748T can be used as a desktop switch to build a small network that enables users to
have 1000 Mbps access to a file server. With full-duplex enabled, the switch port connected
to the server or PC can provide 2000 Mbps throughput.
Figure 4. Desktop Switching
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
LEDLink/Ac t Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factory
Default
12345678910 11 12 221314 15 16 17 1819 20 21 2324 3425 26 27 2829 30313233 35363738 39 40 41 42 4344
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFPLED
GREEN=
1000Mbps
Blink=ACT
48T
47T
`` ` `

18 | Chapter 3: Applications
GS748T Smart Switch Hardware Installation Guide
Backbone Switching
You can use the GS748T Gigabit Smart Switch as a backbone switch in a small network that
gives users high-speed access to servers and other network devices.
Figure 5. Backbone Switching
LED Link/Act Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT
Power
Reset Factor y
Default
12345678910 11 12 221314 15 16 17 1819 20 21 2324 3425 26 27 2829 30313233 35363738 39 40 41 42 4344
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFP LED
GREEN=
1000Mbps
Blink=ACT
48T
47T
` `
```
Model FS728TP
Model GS108T
GS748T

Chapter 3: Applications |19
GS748T Smart Switch Hardware Installation Guide

Chapter 4: Installation |20
4. Installation 4
This chapter describes the installation procedures for your GS748T Gigabit Smart Switch.
Switch installation involves the following steps:
Step 1: Preparing the Site
Step 2: Installing the Switch
Step 3: Checking the Installation
Step 4: Connecting Devices to the Switch
Step 5: Installing an SFP Transceiver Module
Step 6: Applying AC Power
Step 7: Managing the Switch using a Web Browser or the PC Utility