Cabletron Systems STHI-44 Requirements & Specifications, General Considerations, Crosstalk, Noise

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CHAPTER 2

REQUIREMENTS & SPECIFICATIONS

This chapter describes network guidelines, power requirements, and operating specifications for the STH. Before installing the STH, read this chapter and confirm that the network meets the requirements and conditions specified in this chapter. Failure to follow these guidelines could result in poor network performance.

2.1General Considerations

All devices connected to the STH must meet IEEE 802.5 Token Ring specifications.

Maximum Number of Stations on a Ring

The maximum stack composed of four 24-port STH hubs and one 24-port intelligent hub offers a total of 120 TCU ports, but the number of ports available on the LAN may be increased by the use of passive Multi- station Access Units (MAUs) (refer to Section 1.2.4, Support for Passive MAU Workgroups). The recommended maximum number of stations in a single ring is 250 stations when using STP lobe cabling and 150 stations when using UTP cabling anywhere on the ring.

Crosstalk

Crosstalk is interference caused by signal coupling between different cable pairs contained within a multi-pair cable bundle. Multi-pair cables should not be used for UTP lobe cabling. Avoid mixing Token Ring signals with other applications (voice, etc.) within the same cable.

Noise

Noise can be caused by either crosstalk or externally induced impulses. Outside systems (motors, switching equipment, fluorescent lighting, high amperage equipment) may produce electrical interference causing noise. The number and quality of cable connections also contribute considerably to noise levels. If noise induced errors are suspected, it may be necessary

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Contents Stackable Token Ring HUB USER’S Guide Page FCC Notice DOC NoticeCabletron SYSTEMS, INC Program License Agreement Cabletron Software Program LicenseExclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Contents Installation TroubleshootingIntroduction Using This ManualSTH Overview STH Overview HubSTACKLobe Port and Multiple Ring Out Port Configurations Ring Speed Fault ProtectionLanview LEDs Lanview LEDsAutomatic Beacon Recovery Process Daughter Board Upgrade KitAutomatic Beacon Recovery Process Active CircuitryRelated Manuals Related ManualsImproved Protection from Beaconing No Connection RedundancyDAISY-CHAIN MAU Configuration Getting Help Getting HelpRequirements & Specifications General ConsiderationsMaximum Number of Stations on a Ring CrosstalkInstallation Recommendations TemperatureGeneral Considerations Cable Specifications UTP Cabling SpecificationsCable Specifications UTP Cable CategoriesUTP Cable Categories NextUTP Lobe Lengths STP Cabling SpecificationsUTP Lobe Lengths STP Cable Categories STP Cable CategoriesSTP Lobe Lengths TCU Specifications TCU SpecificationsOperating Specifications Operating SpecificationsRing Speed Ring Sequence Power Supply RequirementsRing Sequence Safety Environmental RequirementsEnvironmental Requirements PhysicalInstallation Installing the STHUnpacking the STH Rack Mount or Wall Mount HardwareAdding the STH to a Stack Adding the STH to a StackAttaching the Strain Relief Bracket Attaching the Strain Relief BracketRack-Mounting the STH Wall-Mounting the STH Wall-Mounting the STHWall-Mounting the STH Free-Standing Installation Free-Standing InstallationConnecting the STH to the Power Source Connecting the STH to the Power SourceAttaching Network Cabling to TCU Ports Finishing the Installation Finishing the InstallationLanview LED Signals TroubleshootingTrouble Resolution Trouble Resolution Loss Of PowerFailure to Link on Enabled Port Ring Speed Fault

42, 24, STHI-44, STH-22 specifications

Cabletron Systems was a pioneer in networking technology, and its STH series, particularly the STH-22 and STHI-44, 24, and 42 models, stand out in the history of networking equipment. These devices were designed for high-performance network management and offered a multitude of features that helped organizations manage their networking resources efficiently.

The STH-22 was a compact and efficient network switch, primarily developed to serve small to medium-sized businesses. One of its main features was its ability to support multiple user connections while offering low latency and high throughput. The STH-22 utilized advanced packet-switching technology to ensure data could move rapidly across the network, enhancing overall communication and productivity.

On the other hand, the STHI-44 model addressed the needs of larger enterprises. It featured advanced routing protocols and could handle a greater number of simultaneous connections, making it ideal for environments with high data traffic. The STHI-44 also incorporated redundancy features to minimize downtime, a vital requirement for businesses that relied heavily on continuous network availability.

The STH-24 and STH-42 models focused on versatility and scalability, catering to a broad range of networking needs. Both models provided extensive support for various networking protocols and featured robust hardware for enhanced durability. The STH-24 was designed for offices requiring mid-range capabilities, while the STH-42 targeted enterprises with more demanding networking requirements.

All STH series devices were built with ease of management in mind. They included user-friendly interfaces that allowed IT personnel to monitor traffic, configure network settings, and troubleshoot issues in real-time. Additionally, the devices supported SNMP (Simple Network Management Protocol) for seamless integration into existing network management systems.

Another defining characteristic of the Cabletron STH series was its commitment to security. These devices came equipped with features that permitted administrators to set access controls and monitor network activity, thereby safeguarding against unauthorized access and potential threats.

In summary, Cabletron Systems' STH-22, STHI-44, STH-24, and STH-42 models represent a significant advancement in networking technology. With their diverse features, high-performance capabilities, and user-centric design, they have served a critical role in optimizing network resources, ensuring businesses were equipped to handle increasing connectivity demands.