Ruijie RG-S3250E Series User manual

Installation Manual
RG-S3250E Series

Copyright Statement
Ruijie Networks Co., Ltd. ©2000-2010
All rights reserved.
Without our written permission, this document may not be excerpted, reproduced, transmitted, or otherwise in all or
in part by any party in any means.
,, , , ,
, , , ,
, are all registered trademarks of Ruijie Networks Co., Ltd. and are
protected by law.
Disclaimer
The information contained in this manual may be modified without notification. Ruijie Networks has tried its best to
maintain the accuracy and reliability of this manual on the website. Ruijie Networks takes no responsibility for the
miss, inaccuracy or error and the resulting damage and loss incurred by this manual.

Contents
Chapter 1 Product Overview.......................................................................................................................... 7
1.1 Product Overview................................................................................................................................................................ 7
1.2 Main Technical Specifications of RG-S3250E.................................................................................................................... 7
1.3 RG-S3250E Series Models.................................................................................................................................................. 9
1.3.1 RG-S3250E-24 Ethernet Switch ................................................................................................................................ 9
1.3.2 RG-S3250E-48 Ethernet Switch .............................................................................................................................. 10
1.4 LED Indicators.................................................................................................................................................................. 12
1.5 Extension Modules............................................................................................................................................................ 14
Chapter 2 Preparation before Installation................................................................................................. 15
2.1 Safety Suggestions ............................................................................................................................................................ 15
2.1.1 Safety Precautions for Installing the System............................................................................................................ 15
2.1.2 Movement Safety..................................................................................................................................................... 15
2.1.3 Electric Safety.......................................................................................................................................................... 15
2.1.4 Static Discharge Damage Prevention....................................................................................................................... 16
2.1.5 Laser Safety.............................................................................................................................................................. 16
2.2 Installation Site Requirements........................................................................................................................................... 16
2.2.1 Ventilation Requirements......................................................................................................................................... 16
2.2.2 Temperature and Humidity Requirements................................................................................................................ 16
2.2.3 Cleanness Requirements .......................................................................................................................................... 17
2.2.4 EMI .......................................................................................................................................................................... 17
2.3 System Grounding Requirements...................................................................................................................................... 18
2.3.1 Safety Grounding..................................................................................................................................................... 18
2.3.2 Lightning Grounding................................................................................................................................................ 18
2.3.3 EMC Grounding....................................................................................................................................................... 18
2.4 Lightning Resistance Considerations ................................................................................................................................ 18
2.5 EMI Consideration ............................................................................................................................................................ 19
2.6 Precaution for Fiber Connections...................................................................................................................................... 19
2.7 Requirements of Installation Tools.................................................................................................................................... 19
Chapter 3 Product Installation..................................................................................................................... 21
3.1 Installation Procedure........................................................................................................................................................ 21
3.2 Confirmations before Installation...................................................................................................................................... 21
3.3 Installing the RG-S3250E Series....................................................................................................................................... 22
3.3.1 Precautions............................................................................................................................................................... 22
3.3.2 Mounting the Switch to a Standard 19-inch Rack.................................................................................................... 22
3.3.3 Mounting the Switch to the Wall.............................................................................................................................. 22
3.3.4 Mounting the Switch to the Desktop........................................................................................................................ 23
3.4 Checking after Installation ................................................................................................................................................ 23
Chapter 4 System Debugging...................................................................................................................... 24
4.1 Establishing the Configuration Environment .................................................................................................................... 24
4.1.1 Establishing the Configuration Environment........................................................................................................... 24
4.1.2 Connecting the Console Cable................................................................................................................................. 24
4.1.3 Setting Terminal Parameters .................................................................................................................................... 24

4.2 Power-on Startup............................................................................................................................................................... 24
4.2.1 Checking before Power-on....................................................................................................................................... 24
4.2.2 Checking after Power-on (Recommended).............................................................................................................. 25
Chapter 5 Maintenance and Troubleshooting.......................................................................................... 26
5.1 General Troubleshooting Procedure.................................................................................................................................. 26
5.2 Troubleshooting Common Faults ...................................................................................................................................... 26

Preface
Thank you for using our switches. This guide provides you with detailed operation guide that allows you to
easily install and use the switches.
Scope
This manual describes the functions and physical features of the switches, and presents the installation procedure,
troubleshooting procedure, technical specifications, and specifications and usages rules of cables and connectors.
It is intended for the users that have some experience in installing and maintaining network hardware and want to
learn the above information. At the same time, it is assumed that the users of this switch are already familiar with
the related terms and concepts of Ethernet.
Document Structure
Chapter 1 "Product Overview" describes the main characteristics, technical specifications, and related
modules of this product.
Chapter 2 "Preparation before Installation" lists the safety, power supply, and site requirements that must
be met before the switch can be installed.
Chapter 3 “Product Installation” describes how to install the integrated switch and modules, and connect its
power cables and grounding lines.
Chapter 4 "System Debugging" describes the debugging after the switch is powered on for the first time.
Chapter 5 "Troubleshooting" describes possible problems, detections and solutions in the switch installation
and application.
Appendix A “Connector and Connection Media”
Appendix B “Mini-GBIC Modules”
Related Documents
Software manual of switches——covering CLI commands, software configuration guide, and version release notes.
Obtaining Documentation
You can obtain the documentation you need through the following channels:
Internet:
You can obtain the latest on-line documentation of Ruijie Networks at:
http://www.ruijie.com.cn
Documentation CD-ROM:
The documentation of Ruijie Networks switches is stored in the CD-ROM package, which is provided to you together
with the product you purchase. The CD-ROM is updated frequently, and may be more current than the printed
documents.
Obtaining Technical Assistance
Ruijie Networks provides excellent technical support services for all our products. You can obtain the technical
assistance you need through any of the following channels:
Ruijie Networks website, from which you can obtain the latest product documentation, causes and problems
analysis of product faults, application solutions, and software upgrade.
Customer service center of Ruijie Networks, which can provide all customers with needed technical
assistance for products, technologies and solutions. The customer service center provides responsive
technical support for your product installation problems, software configuration problems, and other network
performance problems.
Customer services hotline: [phone]
Customer services website: http://support.ruijie.com.cn

Customer services email: [email protected]
Documentation Conventions
The symbols used in this document are described as below:
This symbol draws the attention of readers to some suggestions and references.
This symbol reminds readers to be alert of wrong operations that may lead to loss of data or damage to equipment.

Chapter 1 Product Overview
1.1 Product Overview
The RG-S3250E series switches are the next generation box-type Layer 3 switches introduced by Ruijie Networks.
Integrated with high performance, high security, and multiple services. The RG-S3250E switches are mainly
applicable to the convergence layer of large-scale networks to provide line-speed exchanging and complete QoS
services, and to ensure the undelayed transmission of key data by applying different traffic classification rules to
different services. The S3250E series switches can provide flexible medium interfaces and can meet the connection
requirements of different medium in network constructions.
Table 1-1 RG-S3250E series
Model 10/100Base-T
adaptive Ethernet
port
10/100/1000Base-T
adaptive Ethernet
port
1000Base-X SFP
port
Console port Extension
Module Slot
RG-S3250E-24 24 2 2 1 1
RG-S3250E-48 48 2 2 1 1
The extension module slot supports M3000E-02SFP/GT and M3000E-STACK modules. The M3000E-02SFP/GT
module extends 2 1000M SFP fiber/copper combo ports, and the M3000E-STACK mudule provides 2 full-duplex
stack ports.
The 1000Base-X SFP port and the corresponding 10/100/1000Base-T adaptive Ethernet port form a fiber/copper
combo port. That is, only one port in the fiber/copper combo port is available at a particular time.Table 1-2 shows the
mappings between two ports that form an fiber/copper combo port.
Table 1-2 Mappings between two ports that form an fiber/copper combo port
Model 1000Base-X SFP port 10/100/1000Base-T adaptive Ethernet port
RG-S3250E-24 25F 25
26F 26
RG-S3250E-48 49F 49
50F 50
1.2 Main Technical Specifications of RG-S3250E
Table 1-3 Technical specifications of the S3250E series

Model RG-S3250E-24
RG-S3250E-48
Module type Ethernet 100M: FE-SFP-LX-MM1310
FE-SFP-LH15-SM1310
Ethernet 1000M: Mini-GBIC-SX
Mini-GBIC-LX
Mini-GBIC-LH40
Mini-GBIC-ZX50
Mini-GBIC-ZX80
Mini-GBIC-ZX100
1000Base-T：Mini-GBIC-GT
Note: the supported module type may change at any time. For the detailed change information,
consult the Ruijie Networks.
Extended Module
Type M3000E-02SFP/GT
M3000E-STACK
SFP Port 100Base-X
1000Base-X
Power supply AC input:
Rated pressure range: 100-240V~
Maximum pressure range: 90-264V~
Frequency: 50-60Hz
Rated current: 2 A
Power
consumption
RG-S3250E-24: with extension modules < 27 W and without extension modules < 23 W
RG-S3250E-48: with extension modules < 38 W and without extension modules < 34 W
Temperature Working temperature: 0ºC to 50ºC
Storage temperature: -40ºC to 70ºC
Humidity Working humidity: 10% to 90% RH
Storage humidity: 5% to 90% RH
Fan RG-S3250E-24：no fan
RG-S3250E-48：supports adjustment of fan speed and warning of fan trouble.
Temperature
Warning Temperature warning function
EMC GB9254-1998
Security
compliance
GB4943-2001
Dimensions (w x d
x h)
RG-S3250E-24: 440 x 260 x 44 mm
RG-S3250E-48: 440 x 300 x 44 mm
Weight RG-S3250E-24: with extension modules 4.4 Kg and without extension modules 3.9 Kg
RG-S3250E-48: with extension modules 4.9 Kg and without extension modules 4.4 Kg

1.3 RG-S3250E Series Models
1.3.1 RG-S3250E-24 Ethernet Switch
Product Appearance
The front panel of the RG-S3250E-24 Ethernet switch provides twenty four 10/100Base-T Ethernet ports, two GE
SFP optical-electrical combo ports and one Console port. The backpanel provides AC power input ports and an
extension module slot. 错误！未找到引用源。 shows the appearance of the RG-S3250E-24.
Figure 1-1 Appearance of the RG-S3250E-24
Ports on the Front Panel
Figure 1-2 Schematic diagram of the RG-S3250E-24 front panel
1. Switch status indicator
2. Extension module indicator
3. Extension port 1 status indicator
4. Extension port 2 status indicator
5. Console port
6. 10/100Base-T adaptive Ethernet port
7. 10/100Base-T adaptive Ethernet port indicator
8. 10/100/1000Base-T adaptive Ethernet port
9. 100/1000Base-X SFP port
10. 10/100Base-T adaptive Ethernet port indicator
11. 100/1000Base-X SFP port indicator

Ports on the Backpanel
Figure 1-3 Schematic diagram of the RG-S3250E-24 backpanel
1. Grounding pole
2. 3-core AC power interface
3. Power defense shedding plug
4. Extension module slot
Power Supply System
The RG—S3250E-24 adopts the AC power input.
AC input:
Rated pressure range: 100-240V~
Maximum pressure range: 90-264V~
Frequency: 50-60Hz
Rated current: 2 A
Power cable current: 10A
Heat Dissipation System
The RG-S3250E-24 is designed with no fans. To ensure good dissipation, sufficient ventilation space(10 cm
distance from both sides and the backplane of the cabinet) should be reserved to avoid blocking the air inlet of the
cabinet; otherwise, the dissipation might be affected.
1.3.2 RG-S3250E-48 Ethernet Switch
Product Appearance
The front panel of the RG-S3250E-48 Ethernet switch provides forty eight 10/100Base-T Ethernet ports, two GE
SFP fiber/copper combo ports and one Console port. The backplanel provides AC power input ports and an
extension module slot. 0 shows the appearance of the RG-S3250E-48.
Figure 1-4 Appearance of the RG-S3250E-48
Ports on the Front Panel

Figure 1-5 Schematic diagram of the RG-S3250E-48 front panel
1. Switch status indicator
2. Extension module indicator
3. Extension port 1 status indicator
4. Extension port 2 status indicator
5. Console port
6. 10/100Base-T adaptive Ethernet port
7. 10/100Base-T adaptive Ethernet port indicator
8. 10/100/1000Base-T adaptive Ethernet port
9. 100/1000Base-X SFP port
10. 10/100Base-T adaptive Ethernet port indicator
11. 100/1000Base-X SFP port indicator
Ports on the Backpanel
Figure 1-6 Schematic diagram of the RG-S3250E-48 backpanel
1. Grounding pole
2. 3-core AC power interface
3. Power defense shedding plug
4. Fan outlet
5. Extension module slot
Power Supply System
The RG-S3250E-48 adopts the AC power input.
AC input:
Rated pressure range: 100-240V~
Maximum pressure range: 90-264V~
Frequency: 50-60Hz
Rated current: 2 A
Power cable current: 10A.

Heat Dissipation System
The RG-S3250E-48 adopts turbine fans for heat dissipation purposes, thereby ensuring the device to function
normally in the specified environment. Sufficient space(10cm distance from both sides and the backplane of the
cabinet) should be reserved around the cabinet to allow air circulation. 0 shows the flow scheme of heat dissipation.
Air intake
Air intake
Figure 1-7 Flow scheme of heat dissipation
1.4 LED Indicators
Table 1-4 Indicators for the RG-S3250E-24
Indicator Panel Identification Status Meaning
Link indicator Status Off The switch is not powered on.
Blinking green The switch is being initialized. If the blinking
persists, however, it indicates that an
abnormality occurs.
Solid green Normal switching is performed by the switch.
Solid yellow It indicates a yellow warning on the switch
temperature. Check in time the working
environment of the switch.
Solid red Indicates a fault on the switch. For details, refer
to Section 5.2 Troubleshooting Common Faults.
Extension module
indicator Module Off There is no extension module or the extension
module is not correctly installed.
Solid green The extension module is correctly installed.
Extension module
port indicator
For the
M3000E-02SFP/GT
A/B
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 or 10 M link that the port connects to is
Up.
Blinking yellow Data at a rate of 100 or 10 M are being
transceived at the port.
Extension module Off The stack port is not connected to a link.

Indicator Panel Identification Status Meaning
port indicator
For the
M3000E-STACK
Solid green The stack port links up.
Blinking green Data are being transceived at the stack port.
10/100Mbps RJ-45
port indicator
1~24
Off The port is not connected to a link.
Solid green The 100 M link that the port connects to is Up.
Blinking green Data at a rate of 100 M are being transceived at
the port.
Solid yellow The 10 M link that the port connects to is Up.
Blinking yellow Data at a rate of 10 M are being transceived at
the port.
1000Mbps SFP
port indicator
25F, 26F
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 M link that the port connects to is Up.
Blinking yellow Data at a rate of 100 M are being transceived at
the port.
1000Mbps RJ-45
port indicator
25, 26
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 or 10 M link that the port connects to is
Up.
Blinking yellow Data at a rate of 100 or 10 M are being
transceived at the port.
Table 1-5 Indicators for the RG-S3250E-48
Indicator Panel Identification Status Meaning
Link indicator Status Off The switch is not powered on.
Blinking green The switch is being initialized. If the blinking
persists, however, it indicates that an
abnormality occurs.
Solid green Normal switching is performed by the switch.
Solid yellow It indicates a warning on the switch temperature.
Check the working environment of the switch
immediately.
Solid red Indicates a fault on the switch. For details, refer
to Section 5.2 Troubleshooting Common Faults.
Extension module
indicator Module Off There is no extension module or the extension
module is not correctly installed.
Solid green The extension module is correctly installed.

Indicator Panel Identification Status Meaning
Extension module
port indicator
For the
M3000E-02SFP/GT
A/B
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 or 10 M link that the port connects to is
Up.
Blinking yellow Data at a rate of 100 or 10 M are being
transceived at the port.
Extension module
port indicator
For the
M3000E-STACK
Off The stack port is not connected to a link.
Solid green The stack port links up.
Blinking green Data are being transceived at the stack port.
10/100Mbps RJ-45
port indicator
1~48
Off The port is not connected to a link.
Solid green The 100 M link that the port connects to is Up.
Blinking green Data at a rate of 100 M are being transceived at
the port.
Solid yellow The 10 M link that the port connects to is Up.
Blinking yellow Data at a rate of 10 M are being transceived at
the port.
1000Mbps SFP
port indicator
49F, 50F
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 M link that the port connects to is Up.
Blinking yellow Data at a rate of 100 M are being transceived at
the port.
1000Mbps RJ-45
port indicator
49, 50
Off The port is not connected to a link.
Solid green The 1000 M link that the port connects to is Up.
Blinking green Data at a rate of 1000 M are being transceived at
the port.
Solid yellow The 100 or 10 M link that the port connects to is
Up.
Blinking yellow Data at a rate of 100 or 10 M are being
transceived at the port.
1.5 Extension Modules
The RG-S3250E series switch support the following modules: M3000E-02SFP/GT, M3000E-STACK.
The M3000E-02SFP/GT module is used to extend 2 fiber/copper combo ports. The M3000E-STACK module is used
for the RG-S3250E switch stack.
[Note]: For the detailed description about those two modules, see Switch Extension Module Usage Guide.

Chapter 2 Preparation before Installation
2.1 Safety Suggestions
To avoid personal injury and equipment damage, please carefully read the safety suggestions before you install the
RG-S3250E series.
The following safety suggestions do not cover all possible dangers.
2.1.1 Safety Precautions for Installing the System
Keep the chassis clean and free from any dust.
Do not place the equipment in a walking area.
Do not wear loose clothes or any other things that may be caught by the chassis during installation and
maintenance.
Turn off all power supplies and remove the power sockets and cables before dismantling the cabinet.
2.1.2 Movement Safety
Do not frequently move the device.
When moving the device, note the balance and avoid hurting legs and feet or straining the back.
Before moving the device, turn off all power supplies and dismantle all power modules.
2.1.3 Electric Safety
Observe local regulations and specifications when performing electric operations. Relevant operators must be
qualified.
Carefully check any potential danger in the working area, such as ungrounded power supply, unreliable
grounding of the power supply, and damp/wet ground or floor.
Find out the location of the emergency power supply switch in the room before installation. First cut off the
power supply in the case of an accident.
Try to avoid maintaining the switch that is powered-on alone.
Be sure to make a careful check before you shut down the power supply.
Do not place the equipment in a damp location. Do not let any liquid enter the chassis.
1. Any nonstandard and inaccurate electric operation may cause an accident such as fire or electrical shock,
thus causing severe even fatal damages to human bodies and equipment.

2.Direct or indirect touch through a wet object on high-voltage and mains supply may bring a fatal danger.
2.1.4 Static Discharge Damage Prevention
To prevent damage from static electricity, pay attention to the following:
1.Proper grounding of the equipment and floor
2.Indoor dust prevention
3.Proper humidity conditions
2.1.5 Laser Safety
Among the modules supported by the RG-S3250E series, a great number of optical modules are Class I laser
products. Therefore, pay attention to the following when you use them:
When a fiber transceiver works, ensure that the port has been connected with an optical fiber or is covered
with a dust cap, to keep out dust and avoid burning your eyes.
Do not stare into any optical port.
Do not stare into any optical port under any circumstances, as this may cause permanent damage to your eyes.
2.2 Installation Site Requirements
The RG-S3250E series must be used indoors. To ensure the normal working and a prolonged durable life of the
equipment, the installation site must meet the following requirements.
2.2.1 Ventilation Requirements
For the RG-S3250E series, you must ensure that sufficient space(10cm distance from both sides and the backplane
of the cabinet) is reserved at the ventilation openings to ensure the normal ventilation.After various cables have
been connected, they should be arranged into bundles or placed on the cabling rack to avoid blocking the air inlets.
2.2.2 Temperature and Humidity Requirements
To ensure the normal operation and prolong the service life of RG-S3250E series, you should keep proper
temperature and humidity in the equipment room.
If the equipment room has temperature and humidity that do not meet the requirements for a long time, the
equipment may be damaged.
In an environment with high relative humidity, the insulating material may have bad insulation or even leak
electricity. Sometimes the materials may suffer from mechanical performance change and metallic parts may
get rusted.
In an environment with low relative humidity, however, the insulating strip may dry and shrink. Static electricity
may occur easily and endanger the circuit on the equipment.
In an environment with high temperature, the equipment is subject to even greater harm, as its performance
may degrade significantly and its useful life may be shortened in the case of long-term exposure that
expedites the aging process.
Therefore, the ambient temperature and humidity of the RG-S3250E must meet the requirements listed in Table 2-1:
Table 2-1 Temperature and humidity requirements of the RG-S3250E series

Temperature Relative Humidity
0ºC-50ºC 10%-90%
The ambient temperature and humidity are measured at the point that is 1.5 m above the floor and 0.4 m before the
equipment when there is no protective plate in front or back of the equipment rack.
2.2.3 Cleanness Requirements
Dust poses a severe threat to the running of the equipment. The indoor dust falling on the equipment may be
adhered by the static electricity, causing bad contact of the metallic joint. Such electrostatic adherence may occur
more easily when the relative humidity is low, not only affecting the useful life of the equipment, but also causing
communication faults. Table 2-2 shows the requirements for the dust content and granularity in the equipment room.
Table 2-2 Requirements for the dust content and granularity in the equipment room
Maximum diameter (μm) 0.5 1 3 5
Maximum density (Particles/m3) 1.4 x 10 7 x 10 2.4 x 10 1.3 x 10
Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet strict requirements, as
such poisonous substances may accelerate the corrosion of the metal and the aging of some parts. The equipment
room should be protected from the intrusion of harmful gases such as sulfur dioxide, sulfured hydrogen, nitrogen
dioxide, and chlorine), whose requirements are listed in Table 2-3.
Table 2-3 Requirements for harmful gases in the equipment room
Gas Average (mg/m3) Maximum (mg/m3)
Sulfur dioxide 0.2 1.5
Sulfured hydrogen 0.006 0.03
Nitrogen dioxide 0.04 0.15
Ammonia 0.05 0.15
Chlorine 0.01 0.3
2.2.4 EMI
During applications, the switch may be subject to external interferences that affect the device through conduction
manners such as capacitance coupling, inductive coupling, electromagnetic wave emission, common impedance
(including grounding systems), and wires (power cables, signal cables and outgoing transmission cables). For that
purpose, note that:
For the AC power supply system TN, single-phase three-core power socket with protective earthing
conductors (PE) should be adopted to effectively filter out interference from the power grid through the
filtering circuit.
The switch should be located at places free from large power radio launch pad, radar launch pad, and
high-frequency large-current devices.
If necessary, electromagnetic shielding should be adopted. For example, use interface cables to shield
cables.

Interface cables should be laid inside the equipment room. Outdoor cabling is prohibited, avoiding damages
to device signal interfaces caused by over-voltage or over-current of lightning.
2.3 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the RG-S3250E series. It is the chief
condition to prevent lightning stroke and resist interference. Please carefully check the grounding conditions on the
installation site according to the grounding requirements, and perform grounding operations properly as required.
The correct connection of grounding lines guarantees the lighting and interference resistance of switches and must
be performed with precision.
2.3.1 Safety Grounding
The equipment using AC power supply must be grounded by using the yellow/green safety grounding cable.
Otherwise, when the insulating resistance decreases the power supply and the enclosure in the equipment, electric
shock may occur.
2.3.2 Lightning Grounding
The lightning protection system of a facility is an independent system that consists of the lightning rod, downlead
conductor and the connector to the grounding system, which usually shares the power reference ground and
yellow/green safety cable ground. The lightning discharge ground is for the facility only, irrelevant to the equipment.
2.3.3 EMC Grounding
The grounding required for EMC design includes shielding ground, filter ground, noise and interference suppression,
and level reference. All the above constitute the comprehensive grounding requirements.The grounding resistance
should be less than 1 ohm. The RG-S3250E backplane is reserved with one grounding pole, as shown in 0.
Grounding pole
Figure 2-1 Schematic diagram of the RG-S3250E grounding
2.4 Lightning Resistance Considerations
When the AC power cable is imported outdoors and directly connected to the power port of the switch, lightning line
bank should be adopted to prevent the switch from being hit by lightning shocks. The lightning line bank can be fixed

on the the cabinet, work station, or the equipment room's wall through line buckles and screws. In applications, the
AC first enters the lightning line bank and then the switch.
1The lightning line banks are not provided and should be purchased by users as required.
2For the usage of lightning line banks, refer to their related manuals.
2.5 EMI Consideration
Various interference sources, from either outside or inside the equipment or application system, affect the system in
the conductive ways such as capacitive coupling, inductive coupling, and electromagnetic radiation.
There are two types of electromagnetic interferences: radiated interference and conducted interference, depending
on the type of the transmission path.
When the energy, often RF energy, from a component arrives at a sensitive component via the space, the energy is
known as radiated interference. The interference source can be either a part of the interfered system or a completely
electrically isolated unit. Conducted interference results from the electromagnetic wire or signal cable connection
between the source and the sensitive component, along which cable the interference conducts from one unit to
another. Conducted interference often affects the power supply of the equipment, but can be controlled by a filter.
Radiated interference may affect any signal path in the equipment and is difficult to shield.
1.Effective measures should be taken for the power system to prevent the interference from the electric grid.
2.The working ground of the switch should be preferably separated and kept as far as possible from the grounding
device of the power equipment or the anti-lightning grounding device.
3.Keep the equipment away from high-power radio transmitter, radar transmitting station, and high-frequency
large-current device.
4.Measures must be taken to shield static electricity.
2.6 Precaution for Fiber Connections
Before you connect the fibers, check that the optical connector type and fiber type match the optical interface type
used. In addition, pay attention to the Tx and Rx directions of the fiber. The Tx end of this equipment should be
connected to the Rx end of the peer equipment, and the Rx end of this equipment to the Tx end of the peer
equipment.
2.7 Requirements of Installation Tools
Table 2-4 List of installation tools
Common tools Cross screwdriver, straight screwdriver, related electric cables and optical cables,
bolts, diagonal pliers, straps
Special tools Anti-static tools
Meters Multimeter

The RG-S3250E series are not provided with a tool kit. Please prepare tools on your own.