3Com 3C888 manual Connecting More than Four Users, Stacking Officeconnect Units

Models: 3C888

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CONNECTING MORE THAN FOUR USERS

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After you have finished configuring your Dual 56K LAN Modem, you can connect an additional Ethernet hub or hubs to the Dual 56K LAN Modem to add up to 25 users. An example of a ten-user connection is shown.

To connect an additional hub:

1

Insert one end of a 10BASE-T Ethernet cable

 

(not included) into any available port on the back

 

of the Dual 56K LAN Modem.

2

Insert the opposite end of the cable into one of

 

the 10BASE-T Ethernet ports on the Ethernet

 

hub. (If you are connecting to an OfficeConnect

 

Ethernet Hub 8, insert the cable into port 8.)

 

 

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8

MDI/MDIX

 

 

2

1

4

 

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LAN

1

OfficeConnect

Ethernet Hub 8

 

 

 

 

 

 

 

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OfficeConnect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dual 56K LAN Modem

 

 

 

 

 

 

 

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If you are connecting to an OfficeConnect

 

Ethernet Hub 8, set the MDI/MDIX switch to

 

MDI (that is, pressed in).

4

Connect additional workstations to any

 

available port.

 

If the hub to which you are connecting does not

 

have an MDI/MDIX switch, you will need a

 

cross-over Ethernet cable.

 

 

RESET

Ethernet cable

 

-30

VDC

 

10

MAX

 

0.8A

 

 

3

STACKING OFFICECONNECT UNITS

Use the rubber feet for desktop use. The four self-adhesive rubber feet prevent your Dual 56K LAN Modem from sliding. Attach the feet to the underside of the LAN Modem in the marked corners.

Use the Stacking Clip to stack two or more OfficeConnect units together securely.

CAUTION: You can stack up to a maximum of four units. Smaller units must be stacked on top of larger units.

To stack two units:

1Place the first unit on a flat surface.

2Fit the clip across the top of the unit, as shown. The longer end of the fastening pieces should point downward.

3Align the fastening pieces over the slots on each side of the unit, and then push the clip down gently to secure it. Ensure that the fastening pieces snap into the slots.

4Rest the second unit on top of the clip, and align it with the front of the bottom unit.

5Press down gently to secure the top unit onto the clip, ensuring that the fastening pieces fit into the slots, as shown.

To unstack units, gently pry the top unit away from the clip, and then carefully pull each fastening piece out of its slot to detach the clip from the bottom unit.

2

 

 

Fastening

 

piece

MODEM 1

 

MODEM 2

 

LAN

Status

 

OfficeConnectDual

 

56kLAN

 

Modem

5

 

 

Fastening

 

piece

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3Com 3C888 manual Connecting More than Four Users, Stacking Officeconnect Units, To connect an additional hub

3C888 specifications

The 3Com 3C888 is a versatile networking device that was part of the company's innovative range of network interface cards (NICs) aimed at enhancing computer connectivity. These devices were integral to the evolution of networking in both consumer and enterprise environments during the late 1990s and early 2000s.

One of the standout features of the 3C888 is its dual functionality. It combines both Ethernet and Token Ring capabilities, allowing users to connect to different network types without needing separate cards. This integration made it a particularly attractive option for businesses transitioning from Token Ring to Ethernet networks, as it provided a seamless upgrade path.

The 3C888 utilizes a PCI interface, which offers a wide bandwidth that significantly reduces latency compared to its predecessors. This technological advancement ensures fast and reliable data transfer rates, making it suitable for data-intensive applications. The card also supports a 10/100 Mbps auto-sensing feature, enabling it to adapt to varying network speeds without the need for manual configuration.

Additionally, the card included built-in memory and processing capabilities, allowing it to offload network processing tasks from the main CPU. This feature reduced the overall system load and improved the performance of other applications running on the host machine.

In terms of compatibility, the 3C888 was designed to work with multiple operating systems, including Windows, Linux, and various network protocols. This level of compatibility made it an easy choice for IT departments that managed heterogeneous computing environments.

Another defining characteristic of the 3C888 is its robust diagnostic capabilities. The card comes equipped with advanced tools that facilitate troubleshooting and network monitoring. These tools help network administrators quickly identify and resolve connectivity issues, minimizing downtime and enhancing overall productivity.

Security features were also a key consideration in the design of the 3C888. It supported various encryption protocols, providing secure data transmission over networks, which was crucial during an era when data breaches were beginning to attract significant attention.

In summary, the 3Com 3C888 stands out as a pioneering device that combines multiple networking standards, advanced processing capabilities, and robust security features. Its design not only facilitated the transition between network technologies but also played a crucial role in the growth of enterprise networking solutions during its time. With its blend of features and reliability, the 3C888 has left a lasting mark in the history of networking devices.