3Com Hubs and Switches warranty Ethernet Hubs

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Ethernet Hubs

OfficeConnect Hub TP4 3C16704

A highly cost-effective, entry-level unmanaged hub, the OfficeConnect Hub TP4 provides four 10 Mbps twisted-pair connections and represents the most economical OfficeConnect product for homes or small businesses.

Four RJ-45 10BASE-T connections

OfficeConnect Hub TP4Combo 3C16703

Offering all the functionality of the OfficeConnect Hub TP4, the OfficeConnect Hub TP4Combo delivers the added functionality of one auto-sensing BNC/AUI port for connection to coaxial or alternative media network through the use of optional external transceiver modules.

Four RJ-45 10BASE-T connections

BNC and AUI ports (one active at a time)

Bandwidth Utilization Meter monitors traffic use on the network

OfficeConnect Hub 8/TPO 3C16700

An entry-level hub that provides eight twisted-pair connections, this model offers a cost-effective solution for small businesses wanting a simple, yet powerful network.

Eight RJ-45 10BASE-T connections

OfficeConnect Hub 8/TPC 3C16701

Ideal for growing businesses that may need to expand their existing coaxial network, this hub is configured with eight shielded twisted-pair ports and includes enhanced diagnostic capabilities.

Eight RJ-45 10BASE-T connections

BNC 10BASE2 coaxial port for attaching other units (up to 30 hubs can be daisy-chained on a single segment)

Bandwidth Utilization Meter monitors traffic use on the network

OfficeConnect Hub 8/TPO

OfficeConnect Hub TP16C 3C16702

Ideal for small offices that need expanded network capacity without exceeding sensitive budgets, the OfficeConnect Hub TP16C provides 16 RJ-45 ports and one BNC connector for connectivity to coaxial network backbones.

Sixteen RJ-45 10BASE-T connections

BNC 10BASE2 coaxial port for attaching other units (up to 30 hubs can be daisy-chained on a single segment)

Bandwidth Utilization Meter monitors traffic use on the network

Ethernet (10 Mbps) Configuration Rules

Using twisted-pair cables, you can connect a maximum of four Ethernet (10 Mbps) hubs in series between workstations, or between a workstation and a nonrepeater piece of equipment (such as a switch). Each cable must not exceed 100 m (328 ft).

An example is shown.

10 Mbps link

Example:

Workstation

Switch

 

 

 

 

10

Mbps

 

 

 

 

 

Hub

 

 

 

 

Dual

Speed

 

8

 

 

Hub

 

 

 

 

 

10

Mbps

 

 

 

 

 

Hub

 

 

 

10

Mbps

 

 

 

 

 

 

Hub

Workstation

OfficeConnect Hub 8/TPM 3C16710

For networks requiring more extensive management as well as future expand- ability, this hub offers powerful SNMP management functions, including full RMON support via an embedded SNMP SmartAgent intelligent agent. It’s shipped with 3Com Transcend Quick Configuration Manager software for simplified installation.

Eight RJ-45 10BASE-T connections

Concise installation procedure

Powerful SNMP-based management functions, including full RMON support (nine groups)

Telnet support

Full integration with 3Com Transcend management applications

BNC 10BASE2 coaxial port for attaching other units (up to 30 hubs can be daisy-chained on a single segment)

Bandwidth Utilization Meter monitors traffic use on the network

Advanced security features, including: Disconnect Unknown Device (DUD), which allows the hub to disable a port with an unknown device attached to it or report the incident to a management station; Need To Know (NTK), which prevents unauthorized devices

from intercepting confidential communications

Configurable Alert LED lights when a selected condition such as a preset level of collisions, coaxial port parti- tion, log-in violation, or port security violation occurs

Serial port for connecting a management terminal

Remote Support Tool allows the hub to be configured to monitor the network and report conditions to a reseller or centralized management site via a modem link

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Contents Hubs & Switches OfficeConnect Switch 140M only OfficeConnect Hubs and Switches for Easy NetworkingTranscend Management For OfficeConnect Hub 8/TPM OfficeConnect LED Indicators SwitchesEthernet Hubs Fast Ethernet HubsEthernet Hubs W i t c h e s Fast Ethernet HubsSmall Business Network Kits Bundles SwitchesSmall Business Home Networking Kits B s & S w i t c h e s SpecificationsOfficeConnect Hubs OfficeConnect Switches Warranty SummaryOfficeConnect Switch 140 Unmanaged 10+100BASE-TX Switch OfficeConnect Switch 140M Managed 10+100BASE-TX Switch

Hubs and Switches specifications

3Com Hubs and Switches have been pivotal in networking technology, especially during the 1990s and early 2000s, when businesses were rapidly adopting Local Area Networks (LANs). Known for their reliability and user-friendly designs, 3Com's networking products laid the groundwork for the modern infrastructure we rely on today.

One of the main features of 3Com hubs was their ability to connect multiple devices on a single network. Hubs operate at the physical layer of the OSI model, functioning as simple connection points. They receive data packets from one device and broadcast them to all other connected devices. This made 3Com hubs an economical solution for small networks and home offices, enabling seamless communication but limiting bandwidth efficiency due to collisions in a shared network environment.

In contrast, 3Com switches brought significant advancements to networking technology. Operating at the data link layer, switches intelligently analyze incoming traffic and direct data packets only to the intended recipient. This feature reduces network collisions and enhances overall performance, particularly in larger networks. 3Com switches were designed for scalability, accommodating growing business needs while improving traffic management and bandwidth efficiency.

Another key technology associated with 3Com was their implementation of Virtual LANs (VLANs). VLANs allow network administrators to segment networks into smaller, isolated groups, even when devices are geographically dispersed. This enhances security and performance by controlling broadcast traffic and ensuring sensitive data remains separate.

3Com also prioritized ease of management with features like Simple Network Management Protocol (SNMP) for monitoring devices and traffic. Additionally, their products supported Power over Ethernet (PoE), simplifying installations by delivering power through Ethernet cables to devices like IP phones and security cameras, thus eliminating the need for separate power sources.

With robust build quality, 3Com hubs and switches ensured reliability in demanding environments. They offered a range of products catering to various needs, from small businesses to large enterprises. Though newer technologies have emerged since, the legacy of 3Com hubs and switches remains influential in the development of networking infrastructure, laying groundwork for today’s more advanced systems.