STH Overview

Connector Ports (TCUs) for connections to stations and other network devices.

HubSTACK

STH-24

TOKEN RING HUB with LANVIEW®

SUPPORTING 100 OHM UTP CABLE

 

 

 

24X

23X

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

PWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16Mb/s

STACK

4M

16M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPEED

 

 

 

 

 

6X

5X

4X

3X

2X

1X

 

 

 

12X

11X

10X

9X

8X

7X

STH-24TOKEN RING HUB with LANVIEW®

SN

RESERVED STACK

Figure 1-1. Front and Back Views of the STH-24

Up to four STH hubs can be linked to the same intelligent hub, bringing the total direct connectivity potential to 120 managed TCU ports in the stack. Intelligent hubs serve as the logical “top” of the stack and provide full frame and error statistics for the collective stack, for each individual device, and for each port. Hubs can be added to and removed from the stack without powering-down any of the devices involved.

Cabletron’s HubSTACK Interconnect cables, Part Number 9380141, are needed when stacking hubs.

The STH fully conforms to IEEE 802.5Token Ring specifications for connectivity to Token Ring equipment. STH hubs offer:

support for Cabletron Systems’ Automatic Beacon Recovery Process (ABRP),

Multiple Ring Out connectivity for Passive MAU workgroups,

automatic speed fault protection,

active filtering, re-timing, and repeating circuitry on all ports,

and LANVIEW LEDs for “at-a-glance” diagnostic monitoring.

The STH does not have management capability and is not intended to be used as a stand-alone device. Management must be provided by a Cabletron Systems intelligent hub, either the STHi Stackable Token Ring Hub with Intelligence or the MicroMMAC intelligent hub.

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Cabletron Systems 42, STHI-44, STH-22, 24 manual STH Overview, HubSTACK

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.