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RS FMC-ST Instruction Leaflet

Fast ethernet media converters
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Instruction Leaflet

Table of contents

1.0 Introduction ____________________________________________________1
1.1 Inspecting the package and product ________________________________________1
1.2 Product description ______________________________________________________1
1.3 Features and benefits ____________________________________________________2
1.4 Applications ____________________________________________________________2
2.0 Installation ____________________________________________________3
2.1 Locating the media converter unit __________________________________________3
2.2 Calculating segment distance ______________________________________________3
2.2.1 Segment distance, full-duplex ______________________________________3
2.2.2 Segment distance, half-duplex ____________________________________4
2.3 Connecting fast ethernet media ____________________________________________6
2.3.1 Connecting twisted pair (RJ-45) ____________________________________6
2.3.2 Connecting fibre optic (SC and ST) ________________________________6
3.0 Operation ______________________________________________________7
3.1 Power requirements, power supply types ____________________________________7
3.2 Front panel LEDs ________________________________________________________7
3.3 Up-link switch on TX port __________________________________________________7
4.0 Troubleshooting ________________________________________________7
5.0 Technical specification __________________________________________7
1.0

Introduction

This section describes the RS Fast Ethernet Media Converters, including features and possible
applications.
1.1 Inspecting the package and the product
Inspect the contents of the package for any signs of damage and ensure that the items listed
below are included.
This package should contain:
1
RS Media Converter Unit
1
External Power Supply, 230Vac 50Hz
1
Set of two metal mounting clips with screws
1
Velcro® tape section, approximately 3 inches in length
1
User guide

1.2 Product description

RS Fast Ethernet Media Converters offer a compact, cost-effective way to convert and transmit data
among twisted pair, and fibre network cabling environments. They allow the use of fibre media with
full-duplex devices such as Fast Ethernet switching hubs, and may sometimes be used with shared
(half-duplex) fast ethernet segments as well.
Media Converters
Model FMC-ST RS stock no. 288-5847
Model FMC-SC RS stock no. 288-5853
Issued March 1998
Fast Ethernet
10774

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Summary of Contents for RS FMC-ST RS

  • Page 1 User guide 1.2 Product description RS Fast Ethernet Media Converters offer a compact, cost-effective way to convert and transmit data among twisted pair, and fibre network cabling environments. They allow the use of fibre media with full-duplex devices such as Fast Ethernet switching hubs, and may sometimes be used with shared...

  • Page 2: Features And Benefits

    Highly reliable and dependable RS Media Converters are based on a robust design and are packaged in a metal enclosures to ensure high reliability and durability. 1.4 Applications The primary function of a Media Converter is to permit two different media types to coexist within the same network by allowing data to be transmitted and received between different media types.

  • Page 3: Installation

    Alternatively, a server with full-duplex NIC needs to be connected via a fibre to a 100Mbps switching hub with RJ-45 ports. In these and similar situations, the RS Fast Ethernet Media Converters conveniently converts the twisted pair cable to fibre, allowing use of any available RJ-45 Fast Ethernet switched port with a new or existing fibre cable.

  • Page 4: Segment Distance, Half-Duplex

    The RS Fast Ethernet Media Converters has a PDV of about eighty Bit Times (80 BT), and this value must be included in the overall collision domain diameter PDV calculation as applicable for the placement of the Converters in the topology of the collision domain.
  • Page 5 Class 11 Repeater has a PDV of about 90 to 95 BTs, and twisted-pair or fibre media has a PDV of about 1 BT per meter of length. The RS Media Converters has a PDV of 80 BT. Therefore, in shared Fast Ethernet applications, the converters uses about 80 meters of equivalent cable distance to convert from TX media to fibre FX media, i.e., it consumes almost as much of the available PDV as a...

  • Page 6: Connecting Fast Ethernet Media

    10774 minus 10 BT for two short TP cables from the hubs to the Converters leaves 202 BTs. minus 160 BT for two Media Converters leaves 42 BTs for fibre cable, Which indicates a fibre cable length of about 40 meters. It is obvious that using twisted pair wiring to connect the hubs would enable the interconnect length to be the 100 meters maximum for twisted pair media, and this would still leave about a hundred BTs as a safety margin.

  • Page 7: Operation

    Please follow the suggestions listed below prior to contacting RS. However, if you are unsure of any procedure described in this section, or if the Media Converter is not operating as expected, do not attempt to repair or alter the unit. Contact RS Technical Helpline for assistance.
  • Page 8 Components assumes no responsibility for inaccuracies or omissions, or for the use of this information, and all use of such information shall be entirely at the user’s own risk. No responsibility is assumed by RS Components for any infringements of patents or other rights of third parties which may result from its use.

This manual is also suitable for:

288-5847Fmc-sc rs288-5853

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