3Com Hub manual Returning Products for Repair, Country Telephone Number Fax Number

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Returning Products for Repair

Before you send a product directly to 3Com for repair, you must first obtain a Return Material Authorization (RMA) number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense.

To obtain an authorization number, call or fax:

Country

Telephone Number

Fax Number

 

 

 

Asia, Pacific Rim

+ 65 543 6500

+ 65 543 6348

Europe, South Africa,

+ 31 30 6029900

+ 31 30

and Middle East

 

6029999

Latin America

1 408 326 2927

1 408 326 3355

From the following countries, you may call the toll-free numbers; select option 2 and then option 2:

Country

Telephone Number

Fax Number

 

 

 

Austria

0800 297468

 

Belgium

0800 71429

 

Denmark

800 17309

 

Finland

0800 113153

 

France

0800 917959

 

Germany

0800 1821502

 

Hungary

00800 12813

 

Ireland

1800553117

 

Israel

1800 9453794

 

Italy

1678 79489

 

Netherlands

0800 0227788

 

Norway

800 11376

 

Poland

00800 3111206

 

Portugal

0800 831416

 

South Africa

0800 995014

 

Spain

900 983125

 

Sweden

020 795482

 

Switzerland

0800 55 3072

 

U.K.

0800 966197

 

U.S.A. and Canada

1 800 876 3266

1 408 326 7120

 

 

(not toll-free)

 

 

 

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Contents OfficeConnect Dual Speed Hub 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Introduction Creating your Network Page Introduction Small Network With OfficeConnect HubCreating Your Network Dual Speed Hub 8-FrontPower Adapter socket Dual Speed Hub 8-RearTwisted Pair TP Cables Before You StartWorkstation Connections Hub ConnectionsStacking Clip Stacking the Units TogetherRubber Feet Positioning Your Hub Securing Your HubFast Ethernet 100Mbps Configuration Rules Connecting Workstations and Other Equipment to Your HubConnecting Another OfficeConnect Hub Ethernet 10Mbps Configuration Rules Example of an Ethernet 10Mbps NetworkSpot Checks Making the Connection to Another HubChecking Hub Connections Problem Solving Straight-through Cable/Crossover Cable Networking Terminology Standards Dimensions and StandardsDimensions and Operating Conditions Regulated Materials Statement Environmental StatementsEnd Of Life Statement Environmental Statement about the DocumentationImportant Safety Information Wichtige Sicherheitshinweise Consignes Importantes DE Sécurité Technical Support Online Technical Services3Com Knowledgebase Web Services World Wide Web SiteSupport from Your Network Supplier Support from 3ComEurope North America Returning Products for Repair Country Telephone Number Fax Number3Com Corporation Limited Warranty Warranties Exclusive Disclaimer Electromagnetic Compatibility Wall mounting screw hole guide 142mm 5.6in Part No. DUA 1675-0AAA03 Published June

Hub specifications

3Com Hub: A Cornerstone of Early Networking Technology

The 3Com Hub represents one of the pioneering devices in the realm of computer networking. Developed by 3Com Corporation in the late 1980s, it played a significant role in facilitating communication within local area networks (LANs). As an essential component during the rise of networked computing, the 3Com Hub laid the groundwork for the development of more advanced networking technologies that followed.

One of the main features of the 3Com Hub is its ability to connect multiple devices within a network in a straightforward manner. Operating primarily at the data link layer (Layer 2) of the OSI model, the hub allows for the interconnection of computers, printers, and other network devices using twisted-pair Ethernet cables. Typically available in 8, 16, or 24 ports, it offered scalability to organizations as they expanded their networks.

The hub operates using Ethernet technology, which was evolving rapidly at the time. It effectively transmitted data packets by broadcasting signals to all connected devices. While this method is simple and efficient for smaller networks, it also means that bandwidth is shared among all devices. This mechanism could lead to collisions when multiple devices attempted to send data simultaneously, a common limitation during the era of hubs.

In terms of characteristics, the 3Com Hub is a plug-and-play device, meaning it requires no complex configuration. This ease of installation was particularly advantageous for organizations that were just beginning to adopt networking technologies. The hub also supported a variety of Ethernet standards, including 10BASE-T and 100BASE-T, allowing for flexible implementation as network requirements evolved.

3Com hubs were designed with durability in mind, with a robust chassis that could withstand the rigors of office environments. They typically featured LED indicators for power and link status, providing users with immediate feedback about the operation of the network. Although modern networking has moved toward switches and routers that provide greater efficiency and intelligence, the 3Com Hub remains an iconic representation of early networking solutions.

In conclusion, the 3Com Hub played a vital role during the formative years of computer networking, providing the foundation for many of the technologies that dominate today’s networks. While it may seem primitive in the context of advanced networking options available today, its influence on the development of LAN technologies is undeniable. As organizations continue to navigate the evolution of networking, the legacy of the 3Com Hub endures.