Power-Up Disabled Option Switch

3-13

Power-Up

Disabled Option

Switch

If network management is present, an external switch on the hub’s rear panel allows you to power-up the hub with the ports disabled. The power-up disabled option switch is located between the expansion connectors and the DC input connector, as shown in Figure 3-12.

This feature cannot be fully implemented unless a network management device (such as the LinkBuilder FMS 100 Management Unit) is connected to the hub stack. If no network management is present, leave the power-up disabled option switch in the enabled position (set to E).

tion

EXPA

A

 

 

 

DC INPUT

 

UP

 

 

 

–12

D

E

DOWN

0.2

 

 

 

Power-up disabled

 

 

 

option switch

Figure 3-12 Power-Up Disabled Option Switch

Table 3-4 describes the functioning of the power-up disabled option switch.

Table 3-4 Settings on Power-Up Disabled Option Switch

Setting

Result

 

 

D (disabled)

If network management is present, you can enable specific ports

 

after the hub has been powered-up.

 

If network management is not present, all ports remain disabled

 

after the hub has been powered-up.

E (enabled)

This is the default setting. All ports are enabled after the hub has

 

been powered-up, whether or not network management is present.

 

If network management is present, individual ports can then be

 

disabled after the hub has been powered-up.

 

 

You can use this option for security purposes. For example, you can disable a port where a faulty device or other problem exists. This prevents the disabled port from receiving any data when the hub is powered-up. Conversely, you can enable ports if you want them to receive data.

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3Com 100 TX manual Power-Up Disabled Option Switch, Enabled
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100 TX specifications

The 3Com 100 TX is a leading networking device that revolutionized Ethernet connectivity in both small and large enterprise environments. As a part of the 3Com family, this device was designed to provide reliable and efficient network performance, supporting the growing demands of networking technologies in the late 1990s and early 2000s.

One of the main features of the 3Com 100 TX is its compliance with the 100BASE-TX standard, enabling rapid data rates of up to 100 Mbps. This makes it ideal for high-speed local area networks (LANs) that require swift data transfer among connected devices. The device effectively accommodates the increasing bandwidth needs brought on by resource-heavy applications and the proliferation of internet services.

The 3Com 100 TX employs a Category 5 cabling system, which is crucial in achieving optimal performance. This cabling type allows for improved signal quality and reduced crosstalk, particularly over longer distances. By integrating this technology, the 3Com 100 TX can maintain a reliable point-to-point connection, ensuring minimal packet loss and superior data integrity.

Another significant characteristic of the 3Com 100 TX is its innovative design, which facilitates easy installation and integration into existing network infrastructures. The device features auto-negotiation capabilities, allowing it to automatically detect and adapt to the speed and duplex settings of connected devices. This plug-and-play functionality minimizes configuration time, making it user-friendly for both seasoned network engineers and those new to networking.

In terms of network management, 3Com incorporated various tools to help administrators monitor and troubleshoot network performance efficiently. The device includes diagnostic indicators such as Link and Activity LEDs, providing real-time feedback on connection statuses. This aids in quick identification of potential issues or downtime, ensuring network reliability.

Overall, the 3Com 100 TX remains a noteworthy component in the evolution of Ethernet technology. Its exceptional speed, flexible cabling compatibility, and user-oriented design make it an enduring choice for businesses seeking to enhance their network infrastructure. By investing in such devices, organizations can achieve optimal connectivity, laying a strong foundation for a robust digital ecosystem.
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