Technical Overview

SMB-1 Bus

The SMB-1 is a 1 Mbps management bus located within the SmartSwitch 9000. This bus is utilized by all diagnostic controllers in the system including connectivity modules, power supply modules and the environmental module. The SMB-1 transports inter-chassis information between system components, such as power and environmental information, as well as diagnostic messages. Periodic loop-back tests are performed by all modules that share this bus to ensure the validity of SMB-1. In the event a failure is detected on SMB-1, the SMB-10 may be used as an alternate communication channel.

SMB-10 Bus

The SMB-10 is a 10 Mbps management bus located within the SmartSwitch 9000, which is also used for inter-chassis communication of modules as well as serving as an out-of-band management channel into the SmartSwitch 9000. The SMB-10 is externalized from the chassis via an optional Ethernet Port Interface Module (EPIM) located on the front of the Environmental Module. Through an EPIM connection, full SNMP management of the SmartSwitch 9000 is available out-of- band from user data. Modules which share the SMB-10 bus periodically send out loop-back packets to ensure the validity of SMB-10. In the event a fault is detected on the SMB-10, the SMB-1 can be used as an alternate communication channel by the modules.

System Diagnostic Controller

This diagnostic controller is composed of a Z-80 microprocessor and its supporting logic. The diagnostic controller is designed to control the power-up sequencing of modules, monitor the 9E531-24 input and output power parameters, keep watch over the main host processor, as well as monitor the temperature and control the SMB LANVIEW diagnostic LED. Although the diagnostic controller and the main host processor can operate independent of each other if needed, they exchange information about each other’s status and overall module condition. The information gathered by the diagnostic controller is available to the network manager via local/remote management and the LCD located on the Environmental Module. The 9E531-24 has been designed so that in the event of a diagnostic controller fault, the 9E531-24 will continue to function.

DC/DC Converter

The DC/DC converter converts the 48 VDC on the system power bus to the necessary operating voltages for its host network services module. The diagnostic controller monitors and controls the operation of the DC/DC converter.

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Cabletron Systems 9F125-0, 9F120-08, 9F122-12 manual System Diagnostic Controller, DC/DC Converter, SMB-1 Bus, SMB-10 Bus
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9F125-0, 9F122-12, 9F120-08 specifications

Cabletron Systems made significant contributions to the field of networking equipment, particularly with their product line that includes models like the 9F122-12, 9F120-08, and 9F125-08. These devices are renowned within the industry, particularly for their reliability and performance in enterprise networking environments.

The Cabletron 9F122-12 is a versatile networking device that serves as both a hub and a switch. It is designed with 12 Ethernet ports, providing ample connectivity options for various devices within a local area network. This model supports high data throughput, making it suitable for environments with heavy traffic demands. The 9F122-12 employs advanced traffic management capabilities that help optimize network performance.

On the other hand, the Cabletron 9F120-08 model features eight Ethernet ports, designed specifically for smaller networks or as an extension to larger installations. Its plug-and-play design simplifies deployment, allowing users to easily add devices to their networks without extensive configuration. The 9F120-08 offers robust performance and reliability to ensure minimal downtime and is equipped with capabilities that enhance the security of the network.

The Cabletron 9F125-08 is somewhat similar to the 9F120-08, also providing eight Ethernet ports. However, it incorporates additional features that improve its adaptability to various networking environments. This model supports a range of advanced protocols, allowing for integration with legacy systems while providing a pathway for future enhancements. The 9F125-08 is particularly valued for its capacity to handle mixed traffic types, including voice and data, making it an ideal choice for converged networks.

In terms of technology, Cabletron Systems emphasized modularity and scalability in its designs. These devices are built to accommodate future growth and changes in networking requirements. Each of these models supports various networking standards, ensuring compatibility with a wide range of existing infrastructure.

Overall, Cabletron Systems' 9F122-12, 9F120-08, and 9F125-08 are distinguished by their robust features, reliability, and adaptability. They are well-suited for businesses needing dependable networking solutions, and their legacy continues to influence networking technologies to this day.
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