Allied Telesis AT-FS238b/2, AT-FS238b/1, AT-FS238a/2 Mode Selection Button, Link Test, MissingLink

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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.

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Contents AT-FS238a/1 AT-FS238b/1 AT-FS238a/2 AT-FS238b/2 Page Radiated Energy Declaration Of ConformityRFI Emission Electrical SafetyImmunity LaserAT-FS238a/x and AT-FS238b/x Series Installation Guide Page Table of Contents Appendix B Translated Safety and Emission Information Welcome to Allied Telesyn Where to Find Web-based Guides Document ConventionsOnline Support Contacting Allied Telesyn Technical SupportTelephone Support Technical Support E-mail AddressesReturning Products For Sales or Corporate InformationTell Us What You Think Page Overview AT-FS238a/xSeries Front Panel AT-FS238a/1 Model DIP Switches 100Base-FX 10Base-T/100Base-TX Model External Power SupplyStore and forward switching mode Key FeaturesLED Status LEDsDuplex Mode Twisted Pair PortPort Speed Auto MDI/MDI-X Fiber Optic PortMode Selection Button Link TestMissingLink Smart MissingLink Bridging Converter PerformanceDIP Switches MAC Address TableStore and Forward Network Topology Network TopologiesVerifying Package Contents Installing the Bridging ConverterDistance Planning the InstallationAT-FS238b/2 Micron SMF Simplex 40 km 24.8 mi Selecting a SiteAttaching the Protective Feet Installing the Bridging ConverterDIP Connecting a 12VDC Powered Unit Connecting an 12VDC Powered Unit Wiring and Connecting a 12-50VDC Powered UnitPositive, Ground, and Negative Symbols Connecting the Stripped Wire Installing the Bridging Converter Warranty Registration Page Troubleshooting Troubleshooting Physical EnvironmentalElectrical Rating EMI/RFI Agency CertificationsMin Avg.3 Max Microns Fiber Optic Port SpecificationsOperating Type1 Budget Distance2 Distance3 RJ-45 Pinout AssignmentsMDI-X Page Translated Safety and Emission Information Translated Safety and Emission Information Safety Lightning Danger USA/CanadaEurope EU Translated Safety and Emission Information Betriebstemperatur Sicherheit Gefahr Durch BlitzschlaTranslated Safety and Emission Information Betjeningstemperatur Sikkerhed Fare Under UvejrTranslated Safety and Emission Information Bedrijfstemperatuur Veiligheid Gevaar Voor BlikseminslagTranslated Safety and Emission Information Température De Fonctionnement SécuritéTranslated Safety and Emission Information 13 Käyttölämpötila Turvallisuus SalamaniskuvaaraTranslated Safety and Emission Information Temperatura Di Funzionamento Norme Di Sicurezza Pericolo Di FulminiTranslated Safety and Emission Information Driftstemperatur Sikkerhet Fare For LynnedslagTranslated Safety and Emission Information Temperatura De Funcionamento Segurança Perigo De Choque Causado Por RaioTranslated Safety and Emission Information Temperatura Requerida Para La Operación Seguridad Peligro De RayosTranslated 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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