Installation

Making a Connection via the MDI Daisy-Chain Port

1.To make a direct connection to a compatible hub or switch, use the MDI daisy- chain port (Port 12/24). When connecting to this port, remember to set the port selection switch to MDI. You can also connect any RJ-45 (MDI-X) port on the hub to an MDI daisy-chain port on the other device.

2.Prepare straight-through shielded or unshielded twisted-pair cables with RJ- 45 plugs at both ends. Use 100 Ohm Category 3, 4 or 5 cable for standard 10 Mbps Ethernet connections, or 100 Ohm Category 5 cable for 100 Mbps Fast Ethernet connections. When inserting an RJ-45 plug, be sure the tab on the plug clicks into position to ensure that it is properly seated.

Note

To connect to another hub or switch, you may also attach to (MDI-X) station ports at both ends if you use crossover cabling. For additional information, see “Cabling Verification” on page 16.

3.When connecting to another hub running at 10 Mbps, you can cascade up to 4 hubs, and use up to 100 meters (328 feet) for each inter-hub link. However, if you cascade to another hub running at 100 Mbps (such as two dual-speed hubs), you can only cascade two hubs, and the inter-hub cabling must be limited to 5 meters (16 feet). Configuration examples of dual-speed hubs with switch for both the 10Base-T (Figure 4) and 100Base-TX (Figure 5) cascade rule each include two workable cascade configurations and one example of a configuration that will not work (does not cascade correctly).

4.The only way to extend the inter-hub cabling when operating at 100 Mbps is to reduce the length of cable used to connect the PCs to the hubs. To achieve a larger network diameter, you should use a switch to connect several hubs (or stacks) together. Because a switch breaks up the path for connected devices into separate collision domains, it has no restrictions on cascade length.

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Allied Telesis AT-FH812U-SW, AT-FH824U-SW manual Making a Connection via the MDI Daisy-Chain Port
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AT-FH812U-SW, AT-FH812U, AT-FH824U-SW, AT-FH824U specifications

The Allied Telesis AT-FH824U and AT-FH812U series possess outstanding features suitable for various network requirements. These models are designed to deliver reliable performance, security, and ease of management for modern networking environments.

The AT-FH824U is an 8-port Fast Ethernet switch, engineered to provide high-speed connectivity for small to medium-sized networks. It supports a variety of media types and has 24 Gigabit Ethernet ports, which allow for seamless integration with existing network infrastructures. The device employs a non-blocking architecture, ensuring that data packets are routed efficiently without bottlenecks. Each port can automatically negotiate speeds between 10/100 Mbps, making it versatile for various devices. The switch also provides advanced features such as VLAN support, enabling network segmentation for improved performance and enhanced security.

Similarly, the AT-FH824U-SW variant adds an important layer to network management with its smart features. This managed switch version allows network administrators to monitor and control traffic flow through simple GUI interfaces or command-line SNMP management. The integration of Quality of Service (QoS) capabilities ensures that critical applications receive priority bandwidth, enhancing overall network efficiency.

On the other hand, the AT-FH812U is a more compact model with 12 Fast Ethernet ports. Ideal for smaller office environments, it delivers reliable networking with the same level of performance as its larger counterparts. It also supports IEEE 802.1Q for VLAN tagging, providing improved network functionality and security. This switch can be mounted in a standard rack or placed on a desktop, adding to its versatility.

The AT-FH812U-SW incorporates managed functionality, allowing users to access advanced settings and configurations. With features such as loop prevention, broadcast storm control, and port mirroring, it offers the robustness needed for more complex networking scenarios.

Allied Telesis switches are built with energy-efficient technology, minimizing power consumption without compromising performance. Enhanced security protocols including port security and access control lists make these switches suitable for businesses focused on safeguarding their networks against unauthorized access.

Overall, the AT-FH824U, AT-FH824U-SW, AT-FH812U, and AT-FH812U-SW models offer a blend of technology and performance, catering to the diverse needs of modern network infrastructures. These switches deliver scalability, manageability, and security, making them an ideal choice for various networking applications.
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