NETGEAR GS748T - ProSafe Smart Switch Manual

350 East Plumeria Drive
San Jose, CA 95134
USA
August 2012
202-10725-02
v2.0
GS748T Gigabit Smart
Switch
Hardware Installation Guide

2
GS748T Gigabit Smart Switch
©2012 by 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.
NETGEAR, the NETGEAR logo, and Connect with Innovation are trademarks and/or registered trademarks of
NETGEAR, Inc. and/or its subsidiaries in the United States and/or other countries. Information is subject to change
without notice. Other brand and product names are registered trademarks or trademarks of their respective
holders. ©2012 All rights reserved.
Technical Support
Thank you for choosing NETGEAR. To register your product, get the latest product updates, get support online, or
for more information about the topics covered in this manual, visit the Support website at
http://support.netgear.com
Phone (US & Canada only): 1-888-NETGEAR
Phone (Other Countries): Check the list of phone numbers at
http://support.netgear.com/app/answers/detail/a_id/984
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
202-10725-02 v2.0 August 2012 Second publication

3
Contents
Chapter 1 Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 2 Physical Description
GS748T Front-Panel and Back-Panel Configuration . . . . . . . . . . . . . . . . . 10
LED Designations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Port LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
System LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Device Hardware Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
RJ-45 Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SFP Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Reset Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Factory Defaults Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Chapter 3 Applications
Desktop Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Backbone Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chapter 4 Installation
Step 1: Prepare the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Step 2: Install the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Install the Switch on a Flat Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Install the Switch in a Rack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Step 3: Check the Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Step 4: Connect Devices to the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Step 5: Install an SFP Transceiver Module . . . . . . . . . . . . . . . . . . . . . . . . 24
Step 6: Apply AC Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Step 7: Manage the Switch using a Web Browser or the Smart Control
Center. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Appendix A Troubleshooting
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Additional Troubleshooting Suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Network Adapter Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4
GS748T Gigabit Smart Switch
Switch Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Auto-Negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix B Technical Specifications
Appendix C Notification of Compliance
Index

5
1
1. Introduction
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

6
GS748T Gigabit Smart Switch
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, Class of Service (CoS) for traffic prioritization,
IPv6 Management support to enable IPv6 operation over the network port, IPv6 QoS, IPv6
ACL, static routing, and EEE support. 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 computer.
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.

7
GS748T Gigabit Smart Switch
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 802.3az (Energy Efficient Ethernet)
•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.
•Energy Efficient Ethernet (EEE), defined by IEEE 802.3az, supports operation in a
Low Power Mode.

8
GS748T Gigabit Smart Switch
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
•Quick Installation guide
•Smart Switch Resource CD with NETGEAR Smart Control Center and Installation Guide
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 2213 14 15 16 17 18 19 20 21 23 24 3425 26 27 28 29 30 31 32 33 35 36 37 38 39 40 41 42 43 44
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFP LED
GREEN=
1000Mbps
Blink=ACT
48T
47T

9
2
2. Physical Description
This chapter describes the GS748T Gigabit Smart Switch hardware features. Topics include:
• GS748T Front-Panel and Back-Panel Configuration
• LED Designations
• Device Hardware Interfaces

10
GS748T Gigabit Smart Switch
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 2213 14 15 16 17 18 19 20 21 23 24 3425 26 27 28 29 30 31 32 33 35 36 37 38 39 40 41 42 43 44
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

11
GS748T Gigabit Smart Switch
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

12
GS748T Gigabit Smart Switch
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 or
shielded twisted-pair (UTP or STP) 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 computer) 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.

13
GS748T Gigabit Smart Switch
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.

14
GS748T Gigabit Smart Switch

15
3
3. Applications
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.

16
GS748T Gigabit Smart Switch
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 computer can provide 2000 Mbps throughput.
Figure 4. Desktop Switching
LED Link/Act Mode Green=Link at 1000M Yellow=Linkat 100/10M Blink=ACT
Power
Reset Factory
Default
12345678910 11 12 2213 14 15 16 17 1819 20 21 23 24 3425 26 27 2829 30 31 32 33 35 36 37 3839 40 41 42 43 44
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFPLED
GREEN=
100/
1000Mbps
Blink=ACT
48T
47T
`` ` `

17
GS748T Gigabit Smart Switch
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=Linkat 100/10M Blink=ACT
Power
Reset Factor y
Default
12345678910 11 12 2213 14 15 16 17 18 19 20 21 23 24 3425 26 27 28 29 30 31 32 33 35 36 37 38 39 40 41 42 43 44
46T
45T
48F
47F
50
49
Combo
Ports
GS748T
SFP LED
GREEN=
1000Mbps
Blink=ACT
48T
47T
` `
```
Model FS728TP
Model GS108T
GS748T

18
GS748T Gigabit Smart Switch

19
4
4. Installation
This chapter describes the installation procedures for your GS748T Gigabit Smart Switch.
Switch installation involves the following steps:
Step 1: Prepare the Site
Step 2: Install the Switch
Step 3: Check the Installation
Step 4: Connect Devices to the Switch
Step 5: Install an SFP Transceiver Module
Step 6: Apply AC Power
Step 7: Manage the Switch using a Web Browser or the Smart Control Center

20
GS748T Gigabit Smart Switch
Step 1: Prepare the Site
Before you install the switch, ensure the operating environment meets the site requirements
in the following table.
Characteristics Requirements
Mounting •Desktop installations - Provide a flat table or shelf surface.
•Rackmount installations - Use a 19-inch (48.3-centimeter) EIA standard equipment
rack that is grounded and physically secure. The rackmount kit supplied with the
switch is also required.
Access Locate the switch in a position that allows access to the front-panel RJ-45 ports, view the
front-panel LEDs, and access the power connector.
Power source Provide a power connection cord. Power specifications for the switch are shown in
Appendix A . Ensure the AC outlet is not controlled by a wall switch, which can
accidentally turn off power to the outlet and the switch.
Environmental •Temperature - Install the switch in a dry area, with ambient temperature between 0
and 50ºC (32ºF and 122ºF). Keep the switch away from heat sources such as direct
sunlight, warm air exhausts, hot-air vents, and heaters.
•Operating humidity - The installation location should have a maximum relative
humidity of 90%, non-condensing.
•Ventilation - Do not restrict airflow by covering or obstructing air inlets on the sides
of the switch. Keep at least 2 inches (5.08 centimeters) free on all sides for cooling.
Be sure there is adequate airflow in the room or wiring closet where the switch is
installed.
•Operating conditions - Keep the switch at least 6 ft. (1.83 meters) away from
nearest source of electromagnetic noise, such as a photocopy machine.