Cabletron Systems 24, 42 Trouble Resolution, Loss Of Power, Loss of Contact with Intelligent Hub

Page 35

Trouble Resolution

Loss Of Power

If the STH is having power problems, check the power delivery system (power cable, power outlet, circuit breaker, fuse).

Loss of Contact with Intelligent Hub

If the STACK LED is indicating disconnection from the intelligent hub, it may be that the intelligent hub has placed the STH in bypass to protect itself from beaconing conditions or a mismatched ring speed on the STH. Check the STH for beaconing conditions and make sure that the STH is operating at the same rings speed as the intelligent hub.

It may be that the STH is physically disconnected from the intelligent hub by a disconnected or faulty cable. Check the hardware.

Failure to Link on Enabled Port

Check that the Token Ring devices at either end of the cable are powered- up.

Verify that the network cable’s connectors have the proper pinouts. Refer to Section 2.5, TCU Specifications.

Check the cable for continuity. A variety of tools are available for this test, depending on the media you are using.

Check that the cables specifications for dB loss described in Chapter 2.

Ring Speed Fault

The network device being linked at this port is operating at a ring speed different from the STH’s currently set ring speed. Set the two devices to the same speed.

Page 4-2

Image 35
Contents Stackable Token Ring HUB USER’S Guide Page DOC Notice FCC NoticeCabletron Software Program License Cabletron SYSTEMS, INC Program License AgreementExclusion of Warranty Disclaimer of Liability United States Government Restricted Rights Contents Troubleshooting InstallationSTH Overview Using This ManualIntroduction HubSTACK STH OverviewLanview LEDs Lobe Port and Multiple Ring Out Port ConfigurationsRing Speed Fault Protection Lanview LEDsActive Circuitry Automatic Beacon Recovery ProcessDaughter Board Upgrade Kit Automatic Beacon Recovery ProcessNo Connection Redundancy Related ManualsRelated Manuals Improved Protection from BeaconingDAISY-CHAIN MAU Configuration Getting Help Getting HelpCrosstalk Requirements & SpecificationsGeneral Considerations Maximum Number of Stations on a RingGeneral Considerations TemperatureInstallation Recommendations UTP Cable Categories Cable SpecificationsUTP Cabling Specifications Cable SpecificationsNext UTP Cable CategoriesUTP Lobe Lengths STP Cabling SpecificationsUTP Lobe Lengths STP Lobe Lengths STP Cable CategoriesSTP Cable Categories TCU Specifications TCU SpecificationsRing Speed Operating SpecificationsOperating Specifications Ring Sequence Power Supply RequirementsRing Sequence Physical SafetyEnvironmental Requirements Environmental RequirementsRack Mount or Wall Mount Hardware InstallationInstalling the STH Unpacking the STHAdding the STH to a Stack Adding the STH to a StackRack-Mounting the STH Attaching the Strain Relief BracketAttaching the Strain Relief Bracket Wall-Mounting the STH Wall-Mounting the STHWall-Mounting the STH Free-Standing Installation Free-Standing InstallationAttaching Network Cabling to TCU Ports Connecting the STH to the Power SourceConnecting the STH to the Power Source Finishing the Installation Finishing the InstallationTrouble Resolution TroubleshootingLanview LED Signals Ring Speed Fault Trouble ResolutionLoss Of Power Failure to Link on Enabled Port

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.