Allied Telesis AT-FS238a/1, AT-FS238b/1 manual DIP Switches, MAC Address Table, Store and Forward

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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 This prevents the table from becoming filled with addresses of end-nodes that are no longer active.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.

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Contents AT-FS238a/1 AT-FS238b/1 AT-FS238a/2 AT-FS238b/2 Page Radiated Energy Declaration Of ConformityLaser Electrical SafetyRFI Emission ImmunityAT-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 ConventionsTechnical Support E-mail Addresses Contacting Allied Telesyn Technical SupportOnline Support Telephone SupportTell Us What You Think Returning ProductsFor Sales or Corporate Information 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 LEDsPort Speed Duplex ModeTwisted Pair Port Auto MDI/MDI-X Fiber Optic PortMissingLink Mode Selection ButtonLink Test Smart MissingLink Bridging Converter PerformanceStore and Forward DIP SwitchesMAC Address Table 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 Electrical Rating PhysicalEnvironmental 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 Europe EU Safety Lightning DangerUSA/Canada 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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