NETGEAR Safety Gate GS748T User Manual

GS748T Gigabit Smart  
Switch  
Hardware Installation Guide  
350 East Plumeria Drive  
San Jose, CA 95134  
USA  
August 2012  
202-10725-02  
v2.0  
 
Contents  
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1.  
Introduction  
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®
TM  
Congratulations on the purchase of your NETGEAR ProSafe 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:  
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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.  
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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.  
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GS748T Gigabit Smart Switch  
Package Contents  
Figure 1 shows the package contents of the GS748T Gigabit Smart Switch.  
GS748T  
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Power  
LED Link/Act Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT  
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.  
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2.  
Physical Description  
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This chapter describes the GS748T Gigabit Smart Switch hardware features. Topics include:  
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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.  
1000M  
SFP Ports  
1000M SFP  
Combo Ports  
Link/Speed/ACT LEDs  
Reset Button  
GS748T  
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Reset  
Facory  
Default  
Power  
LED Link/Act Mode Green=Link at 1000M Yellow=Link at 100/10M Blink=ACT  
10/100/1000 Ethernet Ports  
Power/Status LED  
Factory Defaults  
Button  
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.  
Power Connector  
Figure 3. Back Panel  
The back panel contains a power connector.  
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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.  
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 YellowA 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 GreenThe 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.  
System LED  
The following table describes the system LED designations.  
LED  
Designation  
Power  
Green—Device is powered on, run-time code is up and running  
Off—Power is not supplied to the device  
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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.  
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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.  
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GS748T Gigabit Smart Switch  
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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.  
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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.  
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Figure 4. Desktop Switching  
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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.  
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Figure 5. Backbone Switching  
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GS748T Gigabit Smart Switch  
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4.  
Installation  
4
This chapter describes the installation procedures for your GS748T Gigabit Smart Switch.  
Switch installation involves the following steps:  
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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.  
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GS748T Gigabit Smart Switch  
Step 2: Install the Switch  
The GS748T can be used on a flat surface or mounted in a standard network equipment  
rack.  
Install the Switch on a Flat Surface  
The switch ships with four self-adhesive rubber footpads. Stick one rubber footpad on each of  
the four concave spaces on the bottom of the switch. The rubber footpads cushion the switch  
against shock and vibrations. They also provide ventilation space between stacked switches.  
Install the Switch in a Rack  
To install the switch in a rack, you need the 19-inch rackmount kit supplied with switch.  
1. Attach the supplied mounting brackets to the side of the switch.  
2. Insert the screws provided in the rackmount kit through each bracket and into the bracket  
mounting holes in the switch.  
3. Tighten the screws with a #1 Phillips screwdriver to secure each bracket.  
4. Align the mounting holes in the brackets with the holes in the rack, and insert two pan-head  
screws with nylon washers through each bracket and into the rack.  
5. Tighten the screws with a #2 Phillips screwdriver to secure mounting brackets to the rack.  
Figure 6. Rack Mount  
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GS748T Gigabit Smart Switch  
Step 3: Check the Installation  
Before applying power to the switch, perform the following steps:  
Inspect the equipment thoroughly.  
Verify that all cables are installed correctly.  
Check cable routing to make sure cables are not damaged or creating a safety hazard.  
Ensure all equipment is mounted properly and securely.  
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GS748T Gigabit Smart Switch  
Step 4: Connect Devices to the Switch  
The following procedure describes how to connect computers to the switch’s RJ-45 ports.  
The GS748T contains Auto Uplink technology, which allows the attaching of devices using  
either straight-through or crossover cables.  
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Figure 7. Connect Devices to the Switch  
Connect each computer to an RJ-45 network port on the Switch front panel (Figure 7). Use  
Category 5 (Cat5) Unshielded Twisted-Pair (UTP) cable terminated with an RJ-45 connector  
to make these connections.  
Note: Ethernet specifications limit the cable length between the switch and  
the attached device to 100m (328 ft.).  
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GS748T Gigabit Smart Switch  
Step 5: Install an SFP Transceiver Module  
The following procedure describes how to install an optional SFP transceiver module into one  
of the SFP ports of the switch.  
Note: Contact your NETGEAR sales office to buy these modules. If you do  
not want to install an SFP module, skip this procedure.  
To install an SFP transceiver, insert the transceiver into the SFP port. Press firmly on the  
flange of the module to seat it securely into the connector. You can install up to three  
additional Gigabit Ethernet modules using this procedure.  
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Figure 8. Install an SFP Transceiver Module  
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GS748T Gigabit Smart Switch  
Step 6: Apply AC Power  
The GS748T Gigabit Smart Switch does not have an ON/OFF switch. Power must be  
controlled by the power cord connection.  
Before connecting the power cord, select an AC outlet that is not controlled by a wall switch,  
which can turn off power to the switch. After selecting an appropriate outlet, use the following  
procedure to apply AC power:  
1. Connect the end of the power connection cable to the power receptacle on the back of  
the switch.  
2. Connect the AC power connection cable into a power source such as a wall socket or  
power strip.  
When applying power, the green Power LED on the switch’s front panel illuminates.  
If the Power LED does not go on, check that the power cable is plugged in correctly and that  
the power source is good. If this does not resolve the problem, refer to Appendix A.  
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GS748T Gigabit Smart Switch  
Step 7: Manage the Switch using a Web Browser or the  
Smart Control Center  
The GS748T contains software for viewing, changing, and monitoring the way it works. This  
management software is not required for the switch to work. The ports can be used without  
using the management software. However, the management software enables the setup of  
VLAN and trunking features, IPv6 management support to enable IPv6 operation over the  
network port, IPv6 QoS (ACL), static routing, EEE support, and also improves the efficiency  
of the switch, which results in the improvement of its overall performance as well as the  
performance of the network.  
After powering up the switch for the first time, the Smart Switch can be configured using a  
Web browser or a program called Smart Control Center. For more information about  
managing the switch, see the GS748T Software Administration Manual on the Smart Switch  
Resource CD.  
Note: The switch is configured with a default IP address of 192.168.0.239  
and a subnet mask of 255.255.255.0.  
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A.  
Troubleshooting  
A
This chapter provides information about troubleshooting the NETGEAR Smart Switch.  
Topics include the following:  
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GS748T Gigabit Smart Switch  
Troubleshooting Chart  
The following table lists symptoms, causes, and solutions of possible problems.  
Symptom  
Cause  
Solution  
Power LED is off.  
No power is received.  
Check the power cord connections and the  
connected device. Ensure all cables used are correct  
and comply with Ethernet specifications.  
Link LED is off or  
intermittent.  
Port connection is not  
working.  
Check the crimp on the connectors and make sure  
that the plug is properly inserted and locked into the  
port at both the switch and the connecting device.  
Ensure all cables used are correct and comply with  
Ethernet specifications. Check for a defective  
computer adapter card, cable, or port by testing them  
in an alternate environment where all products are  
functioning.  
File transfer is slow or  
Half-duplex or full-duplex Make sure the attached device is set to  
performance degradation setting on the switch and auto-negotiate.  
is a problem.  
the connected device are  
not the same.  
A segment or device is  
One or more devices are Verify that the cabling is correct. Ensure all  
not recognized as part of not properly connected,  
connectors are securely positioned in the required  
the network.  
or cabling does not meet ports. Equipment may have been accidentally  
Ethernet guidelines.  
disconnected.  
ACT LED is flashing  
continuously on all  
connected ports and the been created.  
network is disabled.  
A network loop  
(redundant path) has  
Break the loop by ensuring that there is only one  
path from any networked device to any other  
networked device. After you connect to the switch  
management interface, you can configure the  
Spanning Tree Protocol (STP) to prevent network  
loops.  
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GS748T Gigabit Smart Switch  
Additional Troubleshooting Suggestions  
If the suggestions in Troubleshooting Chart do not resolve the problem, refer to the  
troubleshooting suggestions in this section.  
Network Adapter Cards  
Ensure the network adapter cards installed in the computers are in working condition and the  
software driver has been installed.  
Configuration  
If problems occur after altering the network configuration, restore the original connections  
and determine the problem by implementing the new changes, one step at a time. Ensure  
that cable distances, repeater limits, and other physical aspects of the installation do not  
exceed the Ethernet limitations.  
Switch Integrity  
If required, verify the integrity of the switch by resetting the switch. To reset the switch,  
remove the AC power from the switch and then reapply AC power. If the problem continues,  
contact NETGEAR technical support. In North America, call 1-888-NETGEAR. If you are  
outside of North America, please refer to the support information card included with your  
product.  
Auto-Negotiation  
The RJ-45 ports negotiate the correct duplex mode, speed, and flow control if the device at  
the other end of the link supports auto negotiation. If the device does not support auto  
negotiation, the switch determines only the speed correctly, and the duplex mode defaults to  
half-duplex.  
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GS748T Gigabit Smart Switch  
30  
 
B.  
Technical Specifications  
B
Network Protocol and Standards Compatibility  
IEEE 802.3 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  
Management  
Windows 2000 + XP, Vista; Windows 7, Microsoft Explorer 7.0 or above  
IEEE 802.1Q VLAN  
IEEE 802.3ad Link Aggregation  
IEEE 802.1D Spanning Tree Protocol  
IEEE 802.1w Rapid Spanning Tree Protocol  
IEEE 802.1s MSTP  
IEEE 802.1X Port Security  
IEEE 802.1AB LLDP  
SNMP v1, v2c, and v3  
HTTP and HTTPS  
Port Mirroring (RX, TX, and Both)  
IGMP Snooping v1/v2/v3  
IEEE 802.1p Class of Service (CoS)  
SNTP (Simple Network Time Protocol) 3 servers. Disabled by default.  
Jumbo Frame Support (9K)  
31  
 
 
GS748T Gigabit Smart Switch  
Static LAGs  
Broadcast Storm Recovery  
RMON 1,2,3,9  
Static L2 Multicast Filtering  
Voice VLAN  
Protected Ports  
DHCP Filtering  
Cable Test  
Syslog (RFC 3164)  
Persistent log supported  
Port Locking  
Denial of Service Protection (control plane)  
Denial of Service Protection (data plane)  
TACACS+  
RADIUS  
EAPol Forwarding  
BPDU Flooding  
Auto VoIP  
Auto Video  
Auto DoS  
ACL Wizard  
Management Security  
Smart Control Center Discovery  
Static Routing  
Boot code update  
Password management  
IPv6 management  
Text-based config  
Inventory Support (Customized)  
Restore Defaults Push Button  
Restore Defaults via Web  
32  
 
GS748T Gigabit Smart Switch  
Standard L2 MIBs support  
User ID configuration  
Authentication login lists  
IPv4 and IPv6 DiffServ  
MAC, IPv4 and IPv6 ACL  
Dual Image Support  
Interface  
48 RJ-45 connectors for 10BASE-T, 100BASE-TX, and 1000BASE-T (Auto Uplink™ on all  
ports)  
Two SFP combo ports for SFP modules  
Two dedicated SFP ports for SFP modules  
LEDs  
Per RJ-45 port: Speed/Link/Activity  
Per SFP port: Speed/Link/Activity  
Per device: Power  
Performance Specifications  
Forwarding modes: Store-and-forward  
Bandwidth: 100 Gbps  
Address database size: 8K media access control (MAC) addresses per system  
Mean Time Between Failure (MTBF): greater than 160,000 hours at 25°C  
Power Supply  
100 VAC–240 VAC/50 Hz–60 Hz, 2.0A Max, universal input  
Physical Specifications  
Dimensions (H x W x D): 1.7 x 17.3 x10.1/43 x 440 x 257 (in/mm)  
Weight: 3.8 kg (8.4 lbs)  
Environmental Specifications  
Operating temperature: 0°C to 50°C (32°F to 122°F)  
Operating humidity: 10% to 90% maximum relative humidity, noncondensing  
33  
 
GS748T Gigabit Smart Switch  
Storage temperature: –20°C to 70°C (–4°F to 158°F)  
Storage humidity: 5% to 95% maximum relative humidity, noncondensing  
Electromagnetic Emissions  
CE Class A, including EN 55022 (CISPR 22), EN 55024, and EN 50082-1  
FCC Part 15 Class A  
VCCI Class A  
C-Tick  
KC  
Safety  
UL/cUL  
CE EN 60950-1  
34  
 
C.  
Notification of Compliance  
C
NETGEAR Wired Products  
Regulatory Compliance Information  
This section includes user requirements for operating this product in accordance with National  
laws for usage of radio spectrum and operation of radio devices. Failure of the end-user to  
comply with the applicable requirements may result in unlawful operation and adverse action  
against the end-user by the applicable National regulatory authority.  
This product's firmware limits operation to only the channels allowed in a particular Region or  
Country. Therefore, all options described in this user's guide may not be available in your version  
of the product.  
FCC Requirements for Operation in the United States  
FCC Information to User  
This product does not contain any user serviceable components and is to be used with  
approved antennas only. Any product changes or modifications will invalidate all applicable  
regulatory certifications and approvals  
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two  
conditions: (1) This device may not cause harmful interference, and (2) this device must  
accept any interference received, including interference that may cause undesired operation.  
FCC Guidelines for Human Exposure  
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled  
environment. This equipment should be installed and operated with minimum distance of 20  
cm between the radiator and your body.  
This transmitter must not be co-located or operating in conjunction with any other antenna or  
transmitter.  
FCC Declaration Of Conformity  
We, NETGEAR, Inc., 350 East Plumeria Drive, San Jose, CA 95134, declare under our sole  
responsibility that the GS748T Gigabit Smart Switch complies with Part 15 of FCC Rules.  
Operation is subject to the following two conditions:  
This device may not cause harmful interference, and  
35  
 
   
GS748T Gigabit Smart Switch  
This device must accept any interference received, including interference that may cause  
undesired operation.  
FCC Radio Frequency Interference Warnings & Instructions  
This equipment has been tested and found to comply with the limits for a Class B 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 uses and can radiate radio frequency energy and, if not installed and used in  
accordance with the instructions, 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 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 methods:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and the receiver.  
Connect the equipment into an electrical outlet on a circuit different from that which the  
radio receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Modifications made to the product, unless expressly approved by NETGEAR, Inc., could void  
the user's right to operate the equipment.  
Canadian Department of Communications Radio Interference Regulations  
This digital apparatus, GS748T Gigabit Smart Switch, does not exceed the Class B limits for  
radio-noise emissions from digital apparatus as set out in the Radio Interference Regulations of  
the Canadian Department of Communications.  
This Class [B] digital apparatus complies with Canadian ICES-003.  
Cet appareil numérique de la classe [B] est conforme à la norme NMB-003 du Canada  
European Union  
The GS748T Gigabit Smart Switch complies with essential requirements of EU EMC Directive  
2004/108/EC and Low Voltage Directive 2006/95/EC as supported by applying the following test  
methods and standards:  
EN55022: 2006 / A1: 2007  
EN55024: 1998 / A1: 2001 / A2: 2003  
EN60950-1: 2005 2nd Edition  
EN 61000-3-2:2006  
EN 61000-3-3:1995 w/A1: 2001+A2: 2005  
36  
 
Index  
Numerics  
1U 7  
I
IEEE 802.3x 7  
8-pin 12  
IEEE Standards 7  
IEEE-compliant 6  
Installation Guide 8  
Installing the Switch 21  
A
Applying AC Power 25  
Auto Uplink 12  
L
Auto-negotiating 7  
Autosensing 12  
LED Designations 11  
Low Latency 6  
B
M
Backpressure 7  
MAC 7  
Media Access Control 7  
C
Category 5 Unshielded Twisted-Pair 6  
Checking the Installation 22  
Class of Service 6  
compliance 35  
Connecting Devices to the Switch 23, 24  
Crossover 12  
O
Operating Conditions 20  
Operating Environment 20  
Operating humidity 20  
Overview 6  
D
P
Default Reset Button 10  
Device Hardware Interfaces 12  
Duplex Mode 12  
Package Contents 8  
Pause Frame Flow Control 7  
Port LEDs 11  
Preparing the Site 20  
F
R
Factory Default Button 13  
Factory Defaults 10  
Flat Surface 21  
Rackmount kit 8  
Reset Button 10  
RJ-45 Ports 12  
Full-duplex 6  
RJ-45 ports 6  
Rubber footpads 8, 21  
G
Gigabit Ports 6  
S
Smart Switch Resource CD 8  
Straight-through 12  
37  
 
 
GS748T Gigabit Smart Switch  
System LEDs 11  
T
technical support 2  
Temperature 20  
trademarks 2  
Traffic Control 6  
Troubleshooting Chart 28  
U
User Intervention 12  
User’s Manual 8  
UTP 23  
V
Ventilation 20  
VLAN 6, 26  
W
Web-based Graphical User Interface 6  
38  
 

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