Allied Telesis Welding System AT FS238a 1 User Manual

AT-FS238a/1

AT-FS238b/1

AT-FS238a/2

AT-FS238b/2

Bridging Converters

Installation Guide

PN 613-50431-00 Rev A

Electrical Safety and Emission Compliance

Statement

Standards: This product meets the following standards.

U.S. Federal Communications Commission

Declaration Of Conformity

Manufacturer Name:

Allied Telesyn, Inc.

Manufacturer Address:

960 Stewart Drive, Suite B

Sunnyvale, CA 94085, USA

Manufacturer Telephone:

Declares that the product:

Model Numbers:

408-730-0950

Bridging Converter

AT-FS238a/1, AT-FS238b/1,

AT-FS238a/2, AT-FS238b/2

This product complies with FCC Part 15B, Class B Limits:

This device complies with part 15 of the FCC Rules. Operation is subject

to the following two conditions: (1) This device must not cause harmful

interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

Radiated Energy

Note: This equipment has been tested and found to comply with the limits

for a Class B digital device pursuant to Part 15 of FCC Rules. These

limits are designed to provide reasonable protection against harmful

interference in a residential installation. This equipment generates, uses

and can radiate radio frequency energy and, if not installed and used in

accordance with instructions, may 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 measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and the receiver.

Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Changes and modifications not expressly approved by the manufacturer

or registrant of this equipment can void your authority to operate this

equipment under Federal Communications Commission rules.

Industry Canada

This Class B digital apparatus meets all requirements of the Canadian

Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exigences du

Règlement sur le matériel brouilleur du Canada.

iii

Electrical Safety and Emission Compliance Statement

RFI Emission

EN55022 Class B

Warning: In a domestic environment this product may cause radio

interference in which case the user may be required to take adequate

measures.

Immunity

EN55024

Warning: This product requires shielded cables to comply with emission

and immunity standards. If it is used with unshielded cables, the user may

be required to take measures to correct the interference problem at their own

expense.

Electrical Safety

Laser

EN60950, UL60950

EN60825

Warning Class 1 Laser product.

Warning Do not stare into the Laser beam.

At time of installation, the Fiber Optic Lasers comply with FDA Radiation

Performance Standard 21CFR Subchapter J, applicable at date of

manufacture.

This is a “Class 1 LED Product” (AT-FS201, AT-FS202 models)

Important: Appendix B contains translated safety statements for installing

this equipment. When you see the

safety statement in your language.

, go to Appendix B for the translated

Wichtig: Anhang B enthält übersetzte Sicherheitshinweise für die

Installation dieses Geräts. Wenn Sie

sehen, schlagen Sie in Anhang B

den übersetzten Sicherheitshinweis in Ihrer Sprache nach.

Vigtigt: Tillæg B indeholder oversatte sikkerhedsadvarsler, der vedrører

installation af dette udstyr. Når De ser symbolet

, skal De slå op i tillæg

B og finde de oversatte sikkerhedsadvarsler i Deres eget sprog.

Belangrijk: Appendix B bevat vertaalde veiligheidsopmerkingen voor het

installeren van deze apparatuur. Wanneer u de

ziet, raadpleeg

Appendix B voor vertaalde veiligheidsinstructies in uw taal.

Important: L'annexe B contient les instructions de sécurité relatives à

l'installation de cet équipement. Lorsque vous voyez le symbole

reportez-vous à l'annexe B pour consulter la traduction de ces instructions

dans votre langue.

Tärkeää: Liite B sisältää tämän laitteen asentamiseen liittyvät käännetyt

turvaohjeet. Kun näet

liitteestä B.

-symbolin, katso käännettyä turvaohjetta

Importante: l’Appendice B contiene avvisi di sicurezza tradotti per

l’installazione di questa apparecchiatura. Il simbolo

, indica di consultare

l’Appendice B per l’avviso di sicurezza nella propria lingua.

Viktig: Tillegg B inneholder oversatt sikkerhetsinformasjon for installering

av dette utstyret. Når du ser

, åpner du til Tillegg B for å finne den

oversatte sikkerhetsinformasjonen på ønsket språk.

Importante: O Anexo B contém advertências de segurança traduzidas para

instalar este equipamento. Quando vir o símbolo

segurança traduzida no seu idioma no Anexo B.

, leia a advertência de

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Importante: El Apéndice B contiene mensajes de seguridad traducidos

para la instalación de este equipo. Cuando vea el símbolo

, vaya al

Apéndice B para ver el mensaje de seguridad traducido a su idioma.

Obs! Bilaga B innehåller översatta säkerhetsmeddelanden avseende

installationen av denna utrustning. När du ser

, skall du gå till Bilaga B

för att läsa det översatta säkerhetsmeddelandet på ditt språk.

Table of Contents

Electrical Safety and Emission Compliance Statement ......................iii

Welcome to Allied Telesyn .......................................................................... ix

Where to Find Web-based Guides ................................................................... ix

Document Conventions .................................................................................... ix

Contacting Allied Telesyn Technical Support .................................................. x

Online Support ........................................................................................... x

Telephone Support ..................................................................................... x

Technical Support E-mail Addresses ........................................................ x

Returning Products .......................................................................................... xi

For Sales or Corporate Information ................................................................ xi

Tell Us What You Think .................................................................................. xi

Chapter 1

Overview .......................................................................................................... 1

External Power Supply .............................................................................. 4

Key Features ...................................................................................................... 5

Status LEDs ....................................................................................................... 6

Twisted Pair Port ............................................................................................... 7

Port Speed ................................................................................................... 7

Duplex Mode ............................................................................................... 7

Auto MDI/MDI-X ........................................................................................ 8

Fiber Optic Port ................................................................................................. 8

Port Speed ................................................................................................... 8

Duplex Mode ............................................................................................... 9

Mode Selection Button ...................................................................................... 9

Link Test ..................................................................................................... 9

MissingLink ................................................................................................ 9

Smart MissingLink .................................................................................. 10

Bridging Converter Performance .................................................................... 10

DIP Switches ............................................................................................ 11

MAC Address Table .................................................................................. 11

Store and Forward .................................................................................... 11

Network Topologies ......................................................................................... 12

vii

Table of Contents

Chapter 2

Installing the Bridging Converter ...........................................................13

Verifying Package Contents ............................................................................1 3

Planning the Installation ................................................................................14

Selecting a Site .........................................................................................15

Installing the Bridging Converter ..................................................................16

Connecting a 12VDC Powered Unit ........................................................18

Wiring and Connecting a 12-50VDC Powered Unit ...............................19

Warranty Registration ....................................................................................23

Chapter 3

Troubleshooting ...........................................................................................25

Appendix A

Technical Specifications ............................................................................2 7

Physical ............................................................................................................2 7

Environmental .................................................................................................27

Electrical Rating ..............................................................................................27

Agency Certifications .......................................................................................28

Fiber Optic Port Specifications .......................................................................29

RJ-45 Pinout Assignments ..............................................................................30

Appendix B

Translated Safety and Emission Information .......................................33

viii

Welcome to Allied Telesyn

This guide contains instructions on how to install the AT-FS238a/x and

AT-FS238b/x Series Bridging Converters.

Where to Find Web-based Guides

The Allied Telesyn web site at www.alliedtelesyn.com offers you an easy

way to access the most recent documentation, software, and technical

information for all of our products. For product guides, select “Support &

Services” from our web site.

Document Conventions

This guide uses the following conventions:

Note

Notes provides additional information.

Caution

Cautions indicate that performing or omitting a specific action may

result in equipment damage or loss of data.

Warning

Warnings indicates that performing or omitting a specific action may

result in bodily injury.

Welcome to Allied Telesyn

Contacting Allied Telesyn Technical Support

You can contact Allied Telesyn technical support online or by telephone, or

e-mail.

Online Support

You can request technical support online by accessing the Knowledge Base at

http:\\kb.alliedtelesyn.com. You can use the Knowledge Base to submit

questions to our technical support staff and review answers to previously

asked questions.

Telephone Support

For Technical Support by telephone, contact Allied Telesyn at one of the

following locations:

Americas

Germany

United States, Canada, Mexico,

Central America, South America

Tel: 1 (800) 428-4835

Switzerland, Austria, Eastern Europe

Tel: (+49) 30-435-900-126

Asia

Italy

Singapore, Taiwan, Thailand,

Malaysia, Indonesia, Korea,

Philippines, China, India, Hong Kong

Tel: (+65) 6381-5612

Spain, Portugal, Greece, Turkey, Israel

Tel: (+39) 02-41-30-41

Australia

Japan

Tel: 1 (800) 000-880

Tel: (+81) 3-3443-5640

France

United Kingdom

Belgium, Luxembourg, The

Netherlands, Middle East, Africa

Tel: (+33) 0-1-60-92-15-25

Denmark, Norway, Sweden, Finland,

Iceland

Tel: (+0044) 1235-442500

Technical Support E-mail Addresses

Latin America, Mexico, Puerto Rico, Caribbean, and Virgin Islands

[email protected]

United Kingdom, Sweden, Norway, Denmark, and Finland

[email protected]

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Returning Products

Products for return or repair must first be assigned a Return Materials

Authorization (RMA) number. A product sent to Allied Telesyn without a

RMA number will be returned to the sender at the sender’s expense.

To obtain an RMA number, contact Allied Telesyn’s Technical Support at one

of the following locations:

North America

Toll-free: 1-800-762-1664

Europe, Africa, and the Middle

East

Fax: 1-425-806-1050

Tel: +44-1793-501401

Fax: +44-1793-431099

Latin America, the Caribbean,

Virgin Islands

Tel: international code + 425-481-3852

Fax: international code + 425-481-3895

Asia and Southeast Asia

Tel: +65-6381-5612

Fax: +65-6383-3830

Mexico

Puerto Rico

Toll-free: 1-800-424-5012, ext 3852

Fax: international code + 425-481-3895 or 1-800-424-4284, ext 3852

Australia

Toll-free: 1-800-000-880

Fax: + 61-2-9438-4966

New Zealand

Toll-free: 0800-45-5782

Fax: +65-383-3830

For Sales or Corporate Information

You can contact Allied Telesyn for sales or corporate information at the

location below:

Allied Teleyn, Inc.

19800 North Creek Parkway, Suite 200

Bothell, WA 98011

Tel: 1 (425) 487-8880

Fax: 1 (425) 489-9191

Tell Us What You Think

If you have any comments or suggestions on how we might improve this or

other Allied Telesyn documents, please fill out the General Enquiry Form

online. This form can be accessed by selecting “Contact Us” from

www.alliedtelesyn.com.

Chapter 1

Overview

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters are the

10/100Mbps fast switch single-mode fiber transceivers which can send and

receive on two different wavelengths (1310nm and 1550nm) on a single-mode

fiber cable.

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters include the

following models:

❑

AT-FS238a/1

AT-FS238a/2

❑

AT-FS238b/1

AT-FS238b/2

Below is how to differentiate between the models mentioned above:

❑

AT-FS238a/1 = (1310TX/1550RX) - 15 km range

AT-FS238b/1 = (1550TX/1310RX) - 15 km range

AT-FS238a/2 = (1310TX/1550RX) - 40 km range

AT-FS238b/2 = (1550TX/1310RX) - 40 km range

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters are designed

to extend the distance of your network by converting Fast Ethernet data

between twisted pair cabling and single-mode fiber optic cabling. These dual-

port bridging converters can also be used to improve the performance of your

network by dividing it into smaller, more manageable segments.

Each bridging converter features a 100Base-FX fiber optic port and a 10Base-

T/100Base-TX twisted pair port.The fiber optic port has a simplex SC

(Subscriber Connector) connector and an operating distance of 15 kilometers

(9.4 miles) or 40 kilometers (24.8 miles), depending on the model. The twisted

pair port has an RJ-45 connector with a maximum operating distance of 100

meters (328 feet).

Overview

The fiber optic port operates at 100 Mbps, while the twisted pair port operates

at 10 Mbps or 100 Mbps. Both ports feature half- and full-duplex operation.

AT-FS238a/x and AT-FS238b/x Series Bridging Converters can be installed on

a desktop or in an AT-MCR12 chassis. These bridging converters are easy to

install and do not require software configuration or management.

Note

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters are

designed to be used in pairs; therefore, the AT-FS238a/x fiber port must

be connected to the AT-FS238b/x fiber port only.

Figure 1 illustrates the front panel of the AT-FS238a/x Series Bridging

Converter.

Figure 1 AT-FS238a/x Series Front Panel (AT-FS238a/1 Model)

Figure 2 illustrates the front panel of the AT-FS238b/x Series Bridging

Converter.

Figure 2 AT-FS238b/x Series Front Panel (AT-FS238b/1 Model)

AT-FS238a/x and AT-FS238b/x Series Installation Guide

The back panel of the AT-FS238a/x and AT-FS238b/x Series Bridging

Converters features a receptacle power connector and DIP switches for

manually configuring the ports.

Note

The AT-FS238a/x and AT-FS238b/x Bridging Converters are designed

with 2 different receptacle connectors: 12VDC only or 12-50VDC version

models.

Figure 3 illustrates the back panel of the AT-FS238a/x or the AT-FS238b/x

Series Bridging Converters with 3-prong receptacle connector for the

12VDC version model.

DIP Switches

12VDC Receptacle Connector

DC Polarity Symbols

Figure 3 Back Panel of the AT-FS238a/x and AT-FS238b/x Series Bridging Converters

(12VDC Receptacle Connector)

Figure 4 illustrates the back panel of the AT-FS238a/x and the AT-FS238b/x

Series Bridging Converters with the 3-prong receptacle connector for the

12-50VDC version model.

DIP Switches

12-50VDC 3-Prong Receptacle Connector

DC Polarity Symbols

Figure 4 Back Panel of the AT-FS238a/x and AT-FS238b/x Series Bridging Converters

(12-50VDC 3-Prong Receptacle Connector)

Overview

Table 1 lists the maximum operating distances for the bridging converters.

Table 1 Maximum Operating Distances

100Base-FX

10Base-T/100Base-TX

Maximum Operating

Model

Maximum Operating

Connector

Distance¹

Distance²

AT-FS238a/1

AT-FS238b/1

15 km (9.3 mi)

RJ-45

100 m (328 ft)

AT-FS238a/2

AT-FS238b/2

40 km (24.8 mi)

100 m (328 ft)

1. Maximum distance for 100 Mbps optical datalinks is dependent on the following factors: type of optical fiber,

duplex mode of both end-nodes, and maximum optical loss budget for each of the optical fiber at the operating

optical wavelength.

2. Maximum distance can only be obtained when the UTP/STP cabling is installed and verified to TIA/EIA 568A

Commercial Building Telecommunications Cabling Standard.

External Power Supply

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters are designed

with either the 12VDC or the 12-50VDC receptacle power connector.

Any of the following power sources can be used with the AT-FS238a/x or

AT-FS238b/x Series Bridging converter.

❑

An AC/DC power adapter - used specifically with the 12VDC-rated

version model

❑

An AT-PWR237 power adapter (12V or 15V output) - used with the

12-50VDC-rated version model. This power adapter must be used with

the power connector provided, shown in Figure 5 on page 5.

❑

A regulated power supply (SELV power source per IEC 60950) - rated

minimum 12-50VDC 0.5A - used specifically with the 12-50VDC-rated

version model. This power supply must be used with the power

connector provided, shown in Figure 5 on page 5.

Note

Use only power sources that are UL Listed (QQGQ or EPBU), TUV

Licensed, or other Safety Agencies approved, suitable for country of use.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Figure 5 illustrates the power connector provided with the unit.

Figure 5 Power Connector for the 12-50VDC Version Converter

Key Features

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters have the

following features:

❑

LEDs for unit and port status

Auto MDI/MDI-X

Mode selection button that toggles between Link Test, MissingLink ,

and Smart MissingLink

❑

DIP switches for configuring the ports

Half- or full-duplex operation on both ports

RJ-45 twisted pair connector

SC fiber optic connector

Data packet forwarding and filtering at full wire speed (10 Mbps to

100 Mbps, and 100 Mbps to 100 Mbps)

❑

Store and forward switching mode

Automatic address learning and aging

IEEE 802.3u compliant auto-negotiation

External power adapter (depending on the model)

For use on a desktop or in an AT-MCR12 chassis

Overview

Status LEDs

Table 2 defines the LEDs for the bridging converters.

Table 2 Status LEDs

LED

Color

Description

PWR

Green

Power is applied to the unit.

AUTO NEG

Green

OFF

Auto-negotiation on the twisted pair port is enabled.

Auto-negotiation on the twisted pair port is disabled.

100M

LNK

Green

OFF

The twisted pair port is operating at 100 Mbps.

The twisted pair port is operating at 10 Mbps.

Green

A valid link has been established on the port.

Data is being received or transmitted on the port.

Blinking

FD/COL

Green

OFF

The bridging converter is operating in full-duplex mode.

The bridging converter is operating in half-duplex mode.

A collision has been detected on the port.

Blinking

Mode Status

SML

Green

MissingLink is enabled.

Smart MissingLink is enabled.

Link Test is enabled.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Twisted Pair Port

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters have one

10Base-T/100Base-TX twisted pair port. The twisted pair port features a

RJ-45 connector.

Port Speed

The twisted pair port is compliant with the 10Base-T and 100Base-TX

standards and is capable of either 10 Mbps or 100 Mbps operation. You can set

the port speed manually or, since the port is IEEE 802.3u auto-negotiation

compliant, you can allow the bridging converter to set the port speed

automatically. With auto-negotiation, the speed of the port is set

automatically by the bridging converter after it determines the speed of the

end-node connected to the port. Auto-negotiation is designed to ensure that

the port on the bridging converter and the end-node are operating at the same

speed and that they are communicating at the highest possible common speed

of the devices.

Duplex Mode

Duplex mode refers to how an end-node receives and transmits data. If an

end-node can receive or transmit data, but not both simultaneously, the end-

node is operating in what is referred to as half-duplex mode. If an end-node

can both receive and transmit data simultaneously, the end-node is said to be

operating in full-duplex mode. Naturally, an end-node capable of operating in

full-duplex can handle data much faster than an end-node that can only

operate in half-duplex mode.

The twisted pair ports on the AT-FS238a/x and AT-FS238b/x Series Bridging

Converter can operate in either half-or full-duplex mode. They are IEEE

802.3u-compliant and use Auto-Negotiation to set the duplex mode setting for

you automatically.

For Auto-Negotiation to operate properly on a bridging converter, the end-

nodes connected to the converter should also use Auto-Negotiation. If an end-

node does not have this feature and has a fixed duplex mode of full-duplex, the

result will be a duplex mode mismatch between the end-node and a converter

port. A port on the bridging converter connected to an end-node with a fixed

duplex mode of full-duplex will operate at only half-duplex. This results in the

end node using full-duplex and the switch port using half-duplex. This can

produce network performance problems. Should you encounter this situation,

you must configure the port on the end-node to use Auto-Negotiation or, if it

lacks that feature, to half-duplex.

Overview

Auto MDI/MDI-X

An RJ-45 twisted pair port on a 10 Mbps or 100 Mbps Ethernet network

device can have one of two possible wiring configurations: MDI or MDI-X. The

RJ-45 port on a PC, router, or bridge is typically wired as MDI, while the

twisted pair port on a bridging converter or hub is usually MDI-X.

To connect two 10 Mbps or 100 Mbps network devices together that have

dissimilar port wiring configurations, such as MDI to MDI-X, you would

usually use a straight-through twisted pair cable. To connect two network

devices that have the same wiring configuration, such as MDI to MDI, you

would usually use a crossover cable.

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters feature

automatic MDI/MDI-X. The RJ-45 port automatically determines the

configuration of the port on the device to which it is connected and then

configures itself appropriately. For example, if a port on a bridging converter

is connected to a port on a bridge, which is typically wired as MDI, the port on

the bridging converter automatically configures itself as MDI-X. This feature

allows you to use either crossover cables or straight-through cable when

connecting a device to the twisted pair port.

Fiber Optic Port

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters have one

100Base-FX fiber optic port. The single-mode fiber optic port features a

simplex SC connector.

Port Speed

The fiber optic port is compliant with the 100Base-FX standard and has a

fixed operating speed of 100 Mbps. The end-node connected to the fiber optic

port on the bridging converter must also be able to operate at 100 Mbps. The

AT-FS238a/x and AT-FS238b/x Series Bridging Converters can send and

receive on the two different wavelengths (1310nm and 1550nm). The different

wavelengths used by these bridging converters are as follow:

❑

AT-FS238a/x - TX=1310 and RX=1550

AT-FS238b/x - TX=1550 and RX=1310

Note

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters are

designed to be used in pairs; therefore, the AT-FS238a/x fiber must be

connected to the AT-FS238b/x fiber only.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Duplex Mode

The fiber optic port on the bridging converter can operate in half- or full-

duplex mode. You must set the duplex mode manually using the DIP switches

on the back of the unit.

Mode Selection Button

Link Test

The link test is a fast and easy way for you to test the connections between the

bridging converter ports and the end-nodes that are connected to the ports. If

a network problem occurs, you can perform a link test to determine which port

is experiencing a problem, and be able to focus your troubleshooting efforts on

the cable and end-node where the problem resides.

A link test is performed when the Mode Selection button is toggled until the

LNK LED is green.

Note

Performing a link test does not interfere with a bridging converter’s

ability to pass network traffic.

MissingLink

The MissingLink feature enables the fiber optic ports on the bridging

converter to pass the “Link” status of their connections to each other. When

the bridging converter detects a problem with one of the ports, such as the loss

of connection to an end-node, the bridging converter shuts down the

connection to the other port, thus notifying the end-node that the connection

has been lost.

For example, if the network twisted pair cable to the 10Base-T/100Base-TX

port on the bridging converter were to fail, the unit would respond by dropping

the link on the 100Base-FX fiber optic port. In this way, the bridging

converter notifies the end-node connected to the fiber optic port that the

connection on the twisted pair port has been lost. If the failure had started

with the fiber optic cabling, the unit would drop the link to the twisted pair

port.

The value to this type of network monitoring and fault notification is that

some devices can be configured to take a specific action in the event of the loss

of connection on a port. In some cases, the unit can be configured to seek a

redundant path to a disconnected end-node or send out a trap to a network

management station, and so alert the network administrator of the problem.

Overview

Note

MissingLink or Smart MissingLink is disabled when you perform a link

test. Consequently, to ensure that the MissingLink or Smart

MissingLink is enabled on the bridging converter, always set the Mode

Selection button so that the ML or SML LED is green during normal

network operations.

Smart MissingLink

Like MissingLink, the Smart MissingLink feature terminates the link on the

failed port thereby notifying you when a connection has been lost.

Additionally, Smart MissingLink indicates on which port the connection has

failed. This is shown by a blinking LNK LED on the good port.

For example, if the network twisted pair cable to the 10Base-T/100Base-TX

port on the bridging converter were to fail, the LNK LED on the 100Base-FX

fiber optic port will blink, indicating a failed connection on the twisted pair

port. The fiber optic port is still able to receive a signal.

The bridging converter notifies the end-node connected to the fiber optic port

that the connection on the twisted pair port has been lost. If the failure had

started with the fiber optic cabling, the LNK LED on the twisted pair port

would blink.

The value to this type of network monitoring and fault notification is so that

you can quickly see which port has failed and troubleshoot your network

accordingly.

Bridging Converter Performance

The bridging converters perform at:

❑

148,800 pps for 100 Mbps and 14,880 pps for 10 Mbps for full wire

speed forwarding and filtering

❑

200 Mbps maximum throughput in 100 Mbps, full-duplex mode

20 Mbps maximum throughput in 10 Mbps, full-duplex mode

Storage for up to 2k MAC addresses

280 kB (per port) packet buffer

Low latency 15.6 µs (64-byte packet, 100 Mbps full-duplex)

AT-FS238a/x and AT-FS238b/x Series Installation Guide

DIP Switches

The DIP switches are used to manually configure the operating characteristics

of the ports. These characteristics include the port speed, duplex mode, and

auto-negotiation.

On the 100Base-FX fiber optic port, you can manually set the duplex mode to

either half- or full-duplex.

On the 10Base-T/100Base-TX twisted pair port, you can manually set the

speed of the port to either 10 Mbps or 100 Mbps, set the duplex mode to either

half- or full-duplex and enable or disable auto-negotiation. Enabling auto-

negotiation will automatically set the port’s speed and duplex mode.

MAC Address Table

Up to 2,000 MAC addresses can be stored in the bridging converter’s MAC

address table. The bridging converter’s self-learning feature will learn all new

addresses in real-time after power-up. If the source address of an incoming

packet is not found in the MAC address table, the bridging converter will

update the table with the new address.

The bridging converter also has an automatic address aging feature that will

delete a source address from the table if it has not seen a frame from the end-

node with that address within five minutes. This prevents the table from

becoming filled with addresses of end-nodes that are no longer active.

The bridging converter forwards all multicast, broadcast, and unicast packets

when the MAC address table has exceeded its storage limit.

Store and Forward

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters support store

and forward switching at Fast Ethernet full-wire speed in 100 Mbps, half- or

full-duplex mode. Packets entering each port are stored in buffers. Once the

full packet is received, the bridging converter will forward or discard the

packet, depending on its destination address and error status. This ensures

that only error-free packets destined for another segment will be transferred

across the bridging converter, reducing network load. For example, if the

packet entering from Port 1 is destined for an end-node on Port 2, the bridging

converter forwards the frame if the frame does not contain any errors. If the

packet from Port 1 is destined for an end-node also connected to Port 1, the

packet is discarded.

Overview

The bridging converter will discard CRC errors, misaligned, runt, and under-

oversized packets. When the packet has dribble bits at the end, the bridging

converter will truncate to octet boundary and check for a good FCS before

forwarding.

Network Topologies

Figure 6 illustrates a back-to-back topology using one AT-FS238a/x and one

AT-FS238b/x Series Bridging Converters to interconnect two small networks

of stackable hubs.

❑

Network 1 has an AT-FS709FC connected to the 100Base-TX port on

the AT-FS238a/x Series Bridging Converter.

❑

Network 2 has an AT-8024 switch connected to the 10Base-T/100Base-

TX port on the AT-FS238b/x Series Bridging Converter.

Network 1

Network 2

AT-8024

AT-FS709FC

AT-8024

AT-FS709FC

AT-FS238a/x

AT-FS709FC

AT-FS238b/x

Twisted Pair

Fiber Optic

Figure 6 Network Topology

Chapter 2

Installing the Bridging Converter

This chapter explains how to install an AT-FS238a/x and AT-FS238b/x Series

Bridging Converters. These bridging converters can be installed on a desktop

or in an AT-MCR12 chassis.

Verifying Package Contents

Make sure the following items are included in your package. If any item is

missing or damaged, contact your Allied Telesyn sales representative for

assistance.

❑

One AT-FS238a/x or AT-FS238b/x Series Bridging Converter

Four protective feet (for desktop use only)

Optional power supply (depending on the model)

Optional power connector

This installation guide

Warranty card

Note

For information on the power supplies used with the AT-FS238a/x or

AT-FS238b/x Series Bridging Converter, refer to “External Power

Supply” on page 3.

Installing the Bridging Converter

Planning the Installation

Be sure to observe the following guidelines when planning the installation of

your bridging converter.

❑

The AT-FS238a/x and AT-FS238b/x Series Bridging Converters must

be connected back-to-back; therefore, one AT-FS238a/x and one AT-

FS238b/x Series converters are required.

❑

The end-node connected to the 10Base-T/100Base-TX twisted pair

port can operate at either 10 Mbps or 100 Mbps.

The end-node connected to the twisted pair port on the bridging

converter can be a network adapter card, repeater, router, hub, or

another bridging converter.

❑

The twisted pair cabling must be kept away from sources of electrical

noise, such as radios, transmitters, power lines, broadband amplifiers,

electrical motor, and fluorescent fixtures.

Refer to Table 3 for the cabling specifications for the twisted pair port.

Table 3 10Base-T/100Base-TX Twisted Pair Cabling Specifications

Maximum Operating

Distance

Operating Mode Cable Type

10Base-T

Shielded or unshielded Category 3 or better

Shielded or unshielded Category 5 or better

100 m (328 ft)

100Base-TX

AT-FS238a/x and AT-FS238b/x Series Installation Guide

❑

Refer to Table 4 for the cabling specifications for the fiber optic port

operating in full-duplex mode.

Table 4 100Base-FX Fiber Optic Cabling Specifications (Full-duplex)

Maximum

Operating

Distance

Maximum

Allowable Loss

Budget

Model

Cable Type

AT-FS238a/1 9/125 micron SMF Simplex

AT-FS238b/1 9/125 micron SMF Simplex

AT-FS238a/2 9/125 micron SMF Simplex

AT-FS238b/2 9/125 micron SMF Simplex

15 km (9.3 mi)

40 km (24.8 mi)

6 dB at 1310 nm

16 dB at 1310 nm

1. Maximum distance for 100 Mbps optical datalinks is dependent on the following factors: quality of fiber optic,

duplex mode of both end-nodes, and maximum optical loss budget for the optical fiber at each optical wavelength.

Note

Refer to “Fiber Optic Port Specifications” on page 29 for additional

information on the fiber optic port.

Selecting a Site

Be sure to observe the following guidelines when selecting a site for your

bridging converter.

❑

Select a site that is dust-free and moisture-free.

Select a site that will allow you to easily access the data cables and

power cord.

❑

Use dedicated power circuits or power conditioners to supply reliable

power to the device.

Use the power sources as described in “External Power Supply” on

page 3.

For 12-50VDC version, provide regulated DC power only from SELV

sources per IEC 60950, such as regulated power supplies.

Note

Use only power sources that are UL Listed (QQGQ or EPBU), TUV

Licensed or other Safety Agencies approved, suitable for country of use.

Installing the Bridging Converter

To install an AT-FS238a/x or an AT-FS238b/x Series Bridging Converter,

perform the following procedures:

1. Remove all equipment from the package and store the packaging material

in a safe place.

Note

Do not remove the dust cover from the fiber optic port until you are

ready to connect the fiber optic cable. Dust contamination can adversely

impact the operating performance of the port and the bridging

converter.

2. Attach the four protective feet (provided) to each corner of the bottom of

the unit. Refer to Figure 7. Do not attach the protective feet if you

are installing the bridging converter in an AT-MCR12 chassis.

Figure 7 Attaching the Protective Feet

3. Configure the DIP switches. Refer to Figure 2 on page 2 for the location of

the DIP switches and Table 5 on page 17 for the possible settings.

Note

Changing the DIP switch settings are effective after resetting the unit.

To reset the unit, power the unit OFF then ON.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Table 5 DIP Switch Settings

DIP

Switch

Number

Port

Setting

Position Description

Speed (Mbps) Up

Down

The twisted pair port is operating at 10

Mbps.

The twisted pair port is operating at 100

Mbps.

Duplex Mode Up

Down

The fiber optic port is operating at

half-duplex mode.

The fiber optic is operating at full-duplex

mode.

Duplex Mode Up

Down

The twisted pair port is operating at

half-duplex mode.

The twisted pair port is operating at

full-duplex mode.

Auto Neg

Down

Auto-negotiation on the twisted pair port is

OFF.

Auto-negotiation on the twisted pair port is

ON.

When setting the DIP switches, consider the following:

❑

Setting the Auto Neg DIP switch for the twisted pair port to ON or

OFF enables or disables auto-negotiation for the port. If you disable

auto-negotiation, be sure to set the DIP switches for the port’s speed

and duplex mode to match the speed and duplex mode of the end-node.

❑

For the fiber optic port, set the port’s duplex mode using the

appropriate Duplex Mode DIP switch. This setting must match the

duplex mode capability of the end-node to be connected to the port.

4. If you are installing the bridging converter in an AT-MCR12 chassis,

download the AT-MCR12 Chassis Installation Guide from our web site for

instructions on how to install the bridging converter, then proceed to

Step 7.

Installing the Bridging Converter

5. Place the bridging converter on a secure, level surface, leaving ample

space around the bridging converter for ventilation.

6. Plug the power adapter into an appropriate AC power outlet and insert

the power plug into the DC receptacle located on the back of the bridging

converter.

For instructions how to connect an 12VDC Powered AT-FS238a/x or AT-

FS238b/x Series Bridging Converter, refer to “Connecting a 12VDC

Powered Unit” on page 18.

For instructions how to wire to an 12-50VDC Powered AT-FS238a/x or

AT-FS238b/x Series Bridging Converter, refer to “Wiring and Connecting

a 12-50VDC Powered Unit” on page 19.

Note

This step does not apply if you are mounting the bridging converter in

an AT-MCR12 chassis.

7. Remove the dust cover from the fiber optic port and connect the fiber optic

cable to the 100Base-FX port.

8. Connect the twisted pair cable to the 10Base-T/100Base-TX port.

9. Power ON the end-nodes.

10. Verify that the LNK LEDs for both the fiber optic port and the twisted

pair port are green. If either LED is OFF, refer to “Troubleshooting” on

page 25 for instructions.

The bridging converter runs a series of self-diagnostic tests. Once the self

tests are complete, the converter is ready for normal network operations.

Connecting a 12VDC Powered Unit

For the 12VDC version bridging converter using an approved safety compliant

AC power adapter, perform the following steps:

Note

This power adapter is not used if you install the bridging converter in an

AT-MCR12 chassis.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

1. Plug one end of the DC power cord to the power receptacle connector

labelled 12VDC on the back panel of the bridging converter, as shown in

Figure 8. Plug the AC/DC power adapter to a power outlet. (Refer to

“Technical Specifications” on page 27 for power requirements.)

Figure 8 Connecting an 12VDC Powered Unit

2. Verify that the PWR LED on the front of the unit is green. If the PWR

LED is OFF, refer to “Troubleshooting” on page 25.

Wiring and Connecting a 12-50VDC Powered Unit

To wire a 12-50VDC powered unit, perform the following step:

1. Before attaching wires to the DC terminal block on the DC power supply,

review the following Warning statements:

Warning

Only trained and qualified personnel are allowed to install or to replace

this equipment.

Warning

For 12-50VDC power connection, install this equipment only in a

Restricted Access Area.

2. On the rear side of the chassis is a 3-prong receptacle connector labeled

12-50VDC. Starting from the left side of the terminal block, identify the

negative, ground, and positive terminals using either the diagram

adjacent to the terminal block or the illustration shown in

Figure 9 on page 20.

Installing the Bridging Converter

DIP SWITCHES

Negative

Positive

Ground

Figure 9 Positive, Ground, and Negative Symbols

Warning

The power input must be provided from SELV source only, per IEC

60950. Do not connect to centralized DC battery bank.

3. Secure the power supply cable in the Restricted Access Area using

multiple cable ties to minimize the chance of the connections being

disturbed by casual contact with the wiring.

Warning

"Safety Hazard"- Check to see if there are any exposed copper strands

coming from the installed wires. When this installation is done correctly

there should be no exposed copper wire strands extending from the

terminal block. Any exposed wiring can conduct harmful levels of

electricity to persons touching the wires.

4. Plug the power connector to the 12-50VDC receptacle connector in the

rear of the converter, as shown in Figure 10.

Figure 10 Connecting a Power Connector to the 12-50VDC Version Model

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Note

UL recognized wires of 22-gauge minimum should be provided by the

installer.

5. With a 22-gauge wire-stripping tool, strip the three wires in the tray cable

coming from the DC input power source to 8mm 1mm

(0.31in. 0.039in.), as shown in Figure 11 on page 21.

Warning

Do not strip more than the recommended amount of wire. Stripping

more than the recommended amount can create a safety hazard by

leaving exposed wire on the terminal block after installation.

Figure 11 Stripped Wire

6. Connect the ground wire to the terminal marked with the ground symbol

by inserting the wire into power connector that comes with the converter

and tightening the connection with a flathead screwdriver, as shown in

Figure 12.

Warning

When installing this equipment, always ensure that the frame ground

connection is installed first and disconnected last.

Figure 12 Connecting the Stripped Wire

7. Connect the negative feed wire to the terminal block marked (-).

8. Connect the positive feed wire to the terminal block marked (+).

Installing the Bridging Converter

9. Connect the other end of the wires to the terminal block on the AT-

PWR237 power adapter.

Note

The terminal block on the AT-PWR237 does not have a connection for

the ground feed wire.

Warning

"Safety Hazard"- Check to see if there are any exposed copper strands

coming from the installed wires. When this installation is done correctly

there should be no exposed copper wire strands extending from the

terminal block. Any exposed wiring can conduct harmful levels of

electricity to persons touching the wires.

10. With the wires securely connected to both the input power connector in

the rear of the unit and the terminal block on the power source, plug the

other end of the power source to the power outlet. (Refer to “Technical

Specifications” on page 27 for power requirements.)

11. Power ON the end-nodes.

12. Verify that the LNK LEDs for both the fiber optic port and the twisted

pair port are green. If either LED is OFF, refer to “Troubleshooting” on

page 25 for instructions.

The bridging converter runs a series of self-diagnostic tests. Once the self

tests are complete, the converter is ready for normal network operations.

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Warranty Registration

When you finish installing the product, you should register your product by

completing the enclosed warranty card and sending it in.

Chapter 3

Troubleshooting

Follow the guidelines below to test and troubleshoot the installation in the

event a problem occurs.

Note

Whenever the speed and/or duplex mode are changed during or after

power ON, power OFF then power back ON the bridging converter to

load the new configuration.

If the PWR LED is OFF, do the following:

❑

If the bridging converter is installed on a desktop, check to be sure

that the power adapter is securely connected to a power outlet and

that the power adapter cable is securely connected to the back of the

bridging converter.

If the bridging converter is installed in an AT-MCR12 chassis, check

that the unit is fully seated in the slot and the retaining screw is

securely fastened.

❑

Verify that the power outlet has power by connecting another device

to it.

Try using another power adapter.

If the LNK LED for the twisted pair port is OFF, do the following:

❑

Check that the end-node connected to the port is powered ON and is

operating properly.

Check that the twisted pair cable is securely connected to the twisted

pair port on the bridging converter and on the end-node.

Check to be sure that the end-nodes connected to the bridging

converter are operating at the same duplex mode.

Troubleshooting

Make sure that the twisted pair cable does not exceed 100 meters (328

❑

feet) and that you are using a Category 3 or better cable for 10Base-T

operation or a Category 5 or better cable for 100Base-TX operation.

If the LNK/ACT LED for the fiber optic port is OFF, do the following:

❑

Verify that the end-node connected to the port is ON and is operating

properly.

Check that the fiber optic cable is securely connected to the fiber optic

port on the bridging converter and on the end-node.

Check to be sure that the end-node connected to the port is operating

at 100 Mbps.

Check to be sure that the end-nodes connected to the bridging

converter are operating at the same duplex mode.

Make sure that the cable connected to the bridging converter’s

receiver port (RX) is connected to the end-node’s transmitter port (TX)

and that the bridging converter’s transmitter port (TX) is connected to

the end-node’s receiver port (RX).

❑

Test the attenuation on the fiber cable to ensure that it does not

exceed acceptable values.

Verify that you are using the appropriate type of fiber optic cables and

that you have not exceeded the maximum operating distances. For the

maximum operating distances, refer to Table 1 on page 4 and for the

cable types, refer to Table 4 on page 15.

❑

Check that the operating specifications of the fiber optic port on the

end-node are compatible with the operating specifications of the fiber

optic port on the bridging converter. For the fiber optic port

specifications, refer to “Fiber Optic Port Specifications” on page 29.

If you are still experiencing problems after testing and troubleshooting the

installation, contact Allied Telesyn Technical Support for assistance. Refer to

“Contacting Allied Telesyn Technical Support” on page x or visit our web site

at www.alliedtelesyn.com for support information.

Appendix A

Technical Specifications

Physical

Dimensions:

W x D x H

10.5 cm x 9.5 cm x 2.5 cm

(4.12 in x 3.75 in x 1.0 in)

Weight:

294 g (10.4 oz)

Environmental

Maximum Operating

Temperature:

0° C to 40° C (32° F to 104° F)

Maximum Storage

Temperature:

-25° C to 70° C (-13° F to 158° F)

5% to 95% non-condensing

Relative Humidity

Storage:

Relative Humidity

Operating:

5% to 90% non-condensing

Operating and

Storage Altitude:

Up to 3,048 meters (10,000 feet)

Electrical Rating

Input Supply Voltage:

Rated Currents:

12VDC or 12-50VDC

0.5A or 0.13A (maximum)

6 W (maximum)

Power Consumption:

Technical Specifications

Agency Certifications

Safety

Conforms to all standards normally supported

by Allied Telesyn products including safety

standards UL60950 (cULus), EN60950,

EN60825 (TUV) CE Compliant

Standard

Immunity

EMI/RFI

IEEE 802.3, IEEE 802.3u

Conforms to EN55024 immunity standard

Meets all applicable requirements for emissions

including but not limited to FCC Part 15

Class B, EN55022 Class B

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Fiber Optic Port Specifications

Table 6 through Table 9 list the specifications for the fiber optic port.

Table 6 Fiber Optic Transmitter

Fiber Optic

Diameter

(microns)

Launch Power (dBm)

Fiber Type -

Connector

Optical

Wavelength

Model

Min.

Avg. Max.

AT-FS238a/1

AT-FS238a/2

AT-FS238b/1

AT-FS238b/2

SMF Simplex - 9/125

1310 nm

1550 nm

-15.0 -11.0 -8.0

SMF Simplex - 9/125

-8.0

-5.0

-2.0

SMF Simplex - 9/125

-15.0 -11.0 -8.0

SMF Simplex - 9/125

-8.0

-5.0

-2.0

1. SMF = Single-Mode Fiber

2. Launch Power is measured at one meter from the transmitter.

3. Launch Power (Avg.) is power coupled into a single-mode fiber.

Table 7 Fiber Optic Receiver

Receiver Sensitivity

(dBm)

Fiber Optic

Diameter

(microns)

Fiber Type -

Connector

Optical

Wavelength

Model

Max.

Avg.

Saturation

AT-FS238a/1

AT-FS238a/2

AT-FS238b/1

AT-FS238b/2

SMF Simplex - 9/125

1550 nm

1310 nm

-30.0 n/a -7.5

-33.0 n/a -2.0

-30.0 n/a -7.5

-33.0 n/a -2.0

SMF Simplex - 9/125

1. SMF = Single-Mode Fiber

Technical Specifications

Table 8 Fiber Optic Datalink

Minimum

Power/Link Operating

Budget

Minimum

Maximum

Operating

Distance

Fiber

Type

Model

Distance

AT-FS238a/1

AT-FS238a/2

AT-FS238b/1

AT-FS238b/2

9/125 SMF

Simplex

6.0 dB

15 km (9.4 mi)

40 km (25 mi)

15 km (9.4 mi)

40 km (25 mi)

9/125 SMF

Simplex

16.0 dB

6.0 dB

9/125 SMF

Simplex

9/125 SMF

Simplex

16.0 dB

1. SMF = Single-Mode Fiber

2. The recommended minimum range is stated in all cases where the maximum transmitter output power exceeds

the receivers saturation level. This is to prevent blinding or burning out of the optical receiver on the far-end node.

3. Distance is calculated based on ideal situations without any other loss factor.

Table 9 Fiber Optic Loss Specification (Benchmark)

Fiber Type -

Connector

Fiber Optic

Diameter

Optical

Wavelength

Typical Loss

Factor

Bandwidth

SMF Simplex - 9/125 microns

1310 nm

0.40 dB/km

N/A

1. SMF = Single-Mode Fiber

RJ-45 Pinout Assignments

Figure 13 shows the pin assignments of the RJ-45 connector.

Figure 13 RJ-45 Pin Assignments

AT-FS238a/x and AT-FS238b/x Series Installation Guide

Table 10 lists the 10Base-T/100Base-TX connector pins and their signals

when the port is operating in either MDI or MDI-X configuration.

Table 10 RJ-45 Pinouts

MDI-X

Signal

MDI

Signal

RX+

RX-

TX+

TX-

RX+

TX-

RX-

Appendix B

Translated Safety and Emission Information

Important: This appendix contains multiple-language translations for the

safety statements in this guide.

Wichtig: Dieser Anhang enthält Übersetzungen der in diesem Handbuch

enthaltenen Sicherheitshinweise in mehreren Sprachen.

Vigtigt: Dette tillæg indeholder oversættelser i flere sprog af

sikkerhedsadvarslerne i denne håndbog.

Belangrijk: Deze appendix bevat vertalingen in meerdere talen van de

veiligheidsopmerkingen in deze gids.

Important: Cette annexe contient la traduction en plusieurs langues des

instructions de sécurité figurant dans ce guide.

Tärkeää: Tämä liite sisältää tässä oppaassa esiintyvät turvaohjeet usealla

kielellä.

Importante: questa appendice contiene traduzioni in più lingue degli avvisi

di sicurezza di questa guida.

Viktig: Dette tillegget inneholder oversettelser til flere språk av

sikkerhetsinformasjonen i denne veiledningen.

Importante: Este anexo contém traduções em vários idiomas das

advertências de segurança neste guia.

Importante: Este apéndice contiene traducciones en múltiples idiomas de los

mensajes de seguridad incluidos en esta guía.

Obs! Denna bilaga innehåller flerspråkiga översättningar av

säkerhetsmeddelandena i denna handledning.

Translated Safety and Emission Information

Standards: This product meets the following standards: