Cabletron Systems STHI-44, STH-22, 42, 24 manual STP Cabling Specifications, UTP Lobe Lengths

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UTP Lobe Lengths

UTP cabling to any non-Token Ring network conductors (telephone, etc.) or ground. If in doubt, test wiring before using.

2.3.2UTP Lobe Lengths

The physical length of the cable connecting a station to a TCU port on the concentrator is referred to as the lobe length. The maximum lobe length attainable with the concentrator, under ideal conditions, is shown in Table 2-2. Cable routing, connector attenuation, noise, and crosstalk can adversely affect the maximum lobe length.

Table 2-2. UTP Maximum Lobe Lengths.

UTP

@ 4 Mb/s

@ 16 Mb/s

 

 

 

 

Category

 

 

 

 

meters

(feet)

meters

(feet)

 

 

 

 

 

 

 

 

 

 

 

3

200

(656)

100*

(328)*

 

 

 

 

 

4

225

(738)

110

(360)

 

 

 

 

 

5

250

(820)

120

(393)

 

 

 

 

 

* for cable with NEXT loss 30.5 dB per 100m

Some UTP category 3 cables fail to meet the performance minimums required to support a Token Ring network. Whereas category 3 allows for near end crosstalk (NEXT) loss as low as 23 dB per 100 m at 16 Mb/s, Token Ring performance requirements demand a NEXT loss of at least

30.5dB. To safeguard against worst case conditions (running at 16 Mb/s and using category 3 cable with the category’s lowest qualifying NEXT loss—23 dB), the recommended maximum lobe length should be reduced to keep crosstalk interference within acceptable levels when using category 3 cable.

2.4STP Cabling Specifications

Both STP concentrator modules (STH-42 / 44) support all STP cables classified as IBM Types 1, 2, 6, and 9. All cables meeting the criteria for classification as IBM Type 1, 2, 6, or 9 meet Token Ring network performance requirements.

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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 TroubleshootingSTH Overview Using This ManualIntroduction 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 CrosstalkGeneral Considerations TemperatureInstallation Recommendations Cable Specifications UTP Cabling SpecificationsCable Specifications UTP Cable CategoriesUTP Cable Categories NextUTP 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 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 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 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.