3Com 100 TX manual Opening the Fuse-holder in the AC Receptacle Assembly

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Replacing the Fuse

2-9

Replacing the Fuse If the hub’s power (PWR) LED was lit initially but is no longer lit, one of the following conditions may have caused the LED to go out:

■The unit may be disconnected from its AC power source.

■If connected to an RPS, the unit may be disconnected from its DC power source.

Verify that the RPS is on and securely attached to the hub.

■The AC power source may have failed.

If you are using AC power, verify that the AC power cord is securely attached.

If the LED is still not lit, the fuse probably needs to be replaced.

The fuse is located in the hub’s AC receptacle assembly on the hub’s rear panel and is supplied as standard equipment for the hub. It is a fast-blow FSF034.1523 fuse or equivalent, rated at 2 A, 250 V.

To replace the fuse, follow these steps:

1Locate the AC receptacle on the hub’s rear panel.

2Disconnect the AC power cord.

3Using a small screwdriver, carefully pry open and pull out the fuse-holder, as shown in Figure 2-7.

Figure 2-7 Opening the Fuse-holder in the AC Receptacle Assembly

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Contents FMS 100-TX HUB 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Glossary Cispr a Compliance Page Figures Port LEDs Hub Operation LEDs TablesGuide How to Use ThisAbout this Guide IntroductionConventions Description IntroductionGeneral Front Panel of LinkBuilder FMS 100-TX Hub Only one Management Unit can be attached to each stack Harming the network Hub InstallingUnpacking Positioning Attaching a Bracket for Rack Mounting Installing a Hub Stack in a Rack Interface Modules InstallingTransceiver 100BASE-TX Redundant UsingPower System Connecting the Redundant Power System to Four Hubs Opening the Fuse-holder in the AC Receptacle Assembly Removing the Fuse Connections Aking FMS 100-TX H UBTwisted-pair Cable Server RJ-45 Connector Pin Assignments Down expansion port UP expansion port Connecting a Hub Stack to a Management Unit Connecting Hubs to the Network Backbone Networks ConsiderationsFor MultisegmentedLinkBuilder FMS Repeaters ClassificationClass II Hubs LED FAN Fail Enabled Power-Up Disabled Option SwitchPage Cabling Requirements Interface ModuleCabling Connecting the Hub in a Network Span of 260.8 Meters Using an Internetworking Device to Extend the Network Span Specifications Page On-line Technical ServicesAccess by Isdn Supplier Support fromYour Network 3Com To find your authorized service providerGlossary FMS Flexible Media Stack Com’s family of stackable hubs Glossary Glossary Numerics IndexInstalling hub Desktop placement 2-5 positioning Index Page Limited Warranty FCC Class a Verification Statement Page Page Page Page Reader Comment Form Business Reply Mail

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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