Operating Specifications

On STH models -42/-44, each RJ45 connector is encased in a metallic shield which provides a means of connection for the STP cable shield. Shield continuity is maintained by contacts within the female RJ45 that contact the metallic casing of the male RJ45 on the STP lobe cabling.

Shielded patch cables that adapt a shielded RJ45 to a Media Interface Connector (MIC) are available from Cabletron Systems in eight-foot lengths. These adapter/patch cables permit connection to an existing patch panel equipped with MICs.

2.6Operating Specifications

Cabletron Systems reserves the right to change these specifications at any time without notice.

2.6.1Ring Speed

The operating ring speed for the STH hub may be set via the Ring Speed Switch on the front face of the STH or by MIB commands from an intelligent hub.

If the STH hub has had no connection to any intelligent hub since power- up, the Ring Speed switch effects immediate changes in the hub’s ring speed. Under normal conditions, however (when the STH is being managed by an intelligent hub), the STH hub’s Ring Speed switch setting is read only at power-up. In order to change the STH hub’s ring speed via the Ring Speed switch, the user must change the switch setting and power-cycle the STH (unplug its power cord and plug it in again).

MIB commands from intelligent hubs override the Ring Speed switch setting. Once the switch setting has been overridden, the MIB command ring speed setting will remain in effect at all subsequent power-ups as long as the switch setting on the STH is not changed. MIB commands are accessible through the MIB Navigator screen on the intelligent hub’s Local Management application and through other SNMP network management software packages including Cabletron Systems’ Remote LANVIEW® / Windows.

The user may cancel the MIB override and regain switch control over the STH hub’s ring speed by changing the current switch position and power-cycling the STH.

Page 2-8

Page 23
Image 23
Cabletron Systems 24, STHI-44, STH-22, 42 manual Operating Specifications, Ring Speed

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.