Allied Telesis AT-FS238b/1, AT-FS238b/2, AT-FS238a/2, AT-FS238a/1 Fiber Optic Port, Auto MDI/MDI-X

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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.

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Contents AT-FS238a/1 AT-FS238b/1 AT-FS238a/2 AT-FS238b/2 Page Declaration Of Conformity Radiated EnergyElectrical Safety RFI EmissionImmunity LaserAT-FS238a/x and AT-FS238b/x Series Installation Guide Page Table of Contents Appendix B Translated Safety and Emission Information Where to Find Web-based Guides Document Conventions Welcome to Allied TelesynContacting Allied Telesyn Technical Support Online SupportTelephone Support Technical Support E-mail AddressesTell Us What You Think Returning ProductsFor Sales or Corporate Information Page Overview AT-FS238a/xSeries Front Panel AT-FS238a/1 Model DIP Switches External Power Supply 100Base-FX 10Base-T/100Base-TX ModelKey Features Store and forward switching modeStatus LEDs LEDPort Speed Duplex ModeTwisted Pair Port Fiber Optic Port Auto MDI/MDI-XMissingLink Mode Selection ButtonLink Test Bridging Converter Performance Smart MissingLinkStore and Forward DIP SwitchesMAC Address Table Network Topologies Network TopologyInstalling the Bridging Converter Verifying Package ContentsPlanning the Installation DistanceSelecting a Site AT-FS238b/2 Micron SMF Simplex 40 km 24.8 miInstalling the Bridging Converter Attaching the Protective FeetDIP Connecting a 12VDC Powered Unit Wiring and Connecting a 12-50VDC Powered Unit Connecting an 12VDC Powered UnitPositive, Ground, and Negative Symbols Connecting the Stripped Wire Installing the Bridging Converter Warranty Registration Page Troubleshooting Troubleshooting Electrical Rating PhysicalEnvironmental Agency Certifications EMI/RFIFiber Optic Port Specifications Min Avg.3 Max MicronsRJ-45 Pinout Assignments Operating Type1 Budget Distance2 Distance3MDI-X Page Translated Safety and Emission Information Translated Safety and Emission Information Europe EU Safety Lightning DangerUSA/Canada Translated Safety and Emission Information Sicherheit Gefahr Durch Blitzschla BetriebstemperaturTranslated Safety and Emission Information Sikkerhed Fare Under Uvejr BetjeningstemperaturTranslated Safety and Emission Information Veiligheid Gevaar Voor Blikseminslag BedrijfstemperatuurTranslated Safety and Emission Information Sécurité Température De FonctionnementTranslated Safety and Emission Information Turvallisuus Salamaniskuvaara 13 KäyttölämpötilaTranslated Safety and Emission Information Norme Di Sicurezza Pericolo Di Fulmini Temperatura Di FunzionamentoTranslated Safety and Emission Information Sikkerhet Fare For Lynnedslag DriftstemperaturTranslated Safety and Emission Information Segurança Perigo De Choque Causado Por Raio Temperatura De FuncionamentoTranslated Safety and Emission Information Seguridad Peligro De Rayos Temperatura Requerida Para La OperaciónTranslated Safety and Emission Information Säkerhet Fara För Blixtnedslag

AT-FS238a/1, AT-FS238a/2, AT-FS238b/1, AT-FS238b/2 specifications

Allied Telesis is a renowned manufacturer specializing in networking solutions, and its AT-FS238 series of switches exemplifies the company's commitment to delivering high-quality networking hardware. The AT-FS238b/2, AT-FS238b/1, AT-FS238a/2, and AT-FS238a/1 are robust, cost-effective Ethernet switches that cater to various networking needs, including small to medium-sized enterprises and branch offices.

These switches are designed with several key features that enhance performance and reliability. One of the standout characteristics is their support for high-speed connections, with 10/100/1000 Mbps ports that ensure fast data transfer rates and efficient network operations. This high-speed capability is essential for organizations that rely on bandwidth-intensive applications.

Allied Telesis AT-FS238 series switches incorporate advanced technology such as Auto-MDI/MDIX, which automatically detects the type of Ethernet cable connected and adjusts accordingly, eliminating the need for crossover cables. This feature significantly simplifies installation and reduces the likelihood of connectivity issues.

The switches also boast a metal chassis that offers durability and helps maintain optimal performance in various environments. With a robust design, these devices can withstand typical operational stresses, making them suitable for deployment in both office and industrial settings.

In terms of manageability, the AT-FS238 series provides basic configuration options through a user-friendly interface, making it accessible for IT staff who may not have extensive networking experience. The switches support plug-and-play functionality, allowing for seamless integration into existing networks without the need for extensive setup.

Power efficiency is another significant aspect of these switches, as they utilize energy-saving technologies that reduce operating costs while maintaining high performance. This characteristic aligns with the growing emphasis on sustainable tech solutions in modern networking.

Each model in the AT-FS238 series is equipped with a varying number of ports, catering to the specific needs of different networking scenarios. These options ensure that organizations can choose the right model that fits their scalability requirements.

In summary, the Allied Telesis AT-FS238b/2, AT-FS238b/1, AT-FS238a/2, and AT-FS238a/1 switches represent a solid choice for businesses seeking reliable and efficient networking solutions. Their combination of high-speed capabilities, user-friendly features, durable design, and energy efficiency makes them a valuable addition to any network infrastructure.
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