Black Box RJ-11, RJ-45 manual Troubleshooting, Active Star Hub’s front-panel Power LED is off

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IC207A/8A-Manual 7/12/00 9:31 AM Page 15

CHAPTER 6: Troubleshooting

6. Troubleshooting

If you have problems with your Active Star Hub, follow the suggestions described in this chapter.

1.Collect all information relevant to this application, including:

• Product serial numbers.

• Host type and operating system software level.

• Quantity and type of peripheral devices.

• Interconnecting cable types and distances.

• Equipment environment.

• Interconnection diagram.

2.Set up the application with the Active Star Hub in one room interconnected with UTP jumpers. Verify the application with a host port and a terminal.

3.Search through the common problems and possible causes provided below.

The Active Star Hub’s front-panel Power LED is off.

Verify that the AC and DC connections are correct.

Verify that the AC outlet is functioning correctly.

If the problem persists, observe the status of the external power supply’s LED and contact Black Box Technical Support at 724-746-5500.

A device is down or unstable.

Verify that the host’s device type matches the device.

Verify that the host workstation controller’s capacity has not been exceeded.

Verify that the device is properly terminated. A peripheral is terminated when its twinaxial port has two 54.9-ohm resistors located between the “A” phase pin and earth ground and the “B” phase pin and earth ground. Termination is provided via a “Y” or “T” cable assembly or by a terminating balun.

Verify that there are no polarity reversals in the cable.

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Contents Active Star Hub-RJ-11 Active Star Hub-RJ-45 Safety Read this FirstActive Star HUB NOM Statement Active Star HUB Trademarks Contents Specifications Active Pair-ConfigurableIntroduction DescriptionIntroduction Active Pair Setup Model Pins 4/5 3/6 1/2Active Pair Setup Jumper Setting for Normal Polarity RJ-45 pins 1 Indicators and Connectors FunctionInstallation Troubleshooting Active Star Hub’s front-panel Power LED is offDevices interfere with each other Copyright 2000. Black Box Corporation. All rights reserved
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RJ-45, RJ-11 specifications

The Black Box RJ-11 and RJ-45 connectors are essential components in modern telecommunications and networking, facilitating connectivity in both telephone systems and data networking environments. These connectors ensure reliable and efficient communication across various devices and networks, boasting a range of features and characteristics that cater to diverse requirements.

The RJ-11 connector is primarily used in telephony systems. Typically, it comprises a 6-position, 2-contact design, although it can also be found in 4- and 6-contact variants. The standard RJ-11 is compatible with telephone lines, allowing for easy connection of telephones, modems, and fax machines. Its compact size and simple design facilitate straightforward installation and replacement. The most notable feature of the RJ-11 is its ability to support voice transmission with a frequency range typically up to 1 MHz, which is adequate for standard phone conversations. The connector's design also minimizes interference and provides secure connections, enhancing call quality.

In contrast, the RJ-45 connector is widely recognized in networking applications, particularly Ethernet networks. This 8-position, 8-contact (8P8C) connector is fundamental for data transmission over Local Area Networks (LANs). The RJ-45 supports various Ethernet standards, including 10BASE-T, 100BASE-TX, and 1000BASE-T, allowing for data rates ranging from 10 Mbps up to 10 Gbps, depending on cable and equipment compatibility. One of the defining characteristics of the RJ-45 is its ability to accommodate shielded and unshielded twisted-pair cabling (STP and UTP), which helps reduce electromagnetic interference, thereby enhancing network stability and performance.

Both RJ-11 and RJ-45 connectors are designed for durability and longevity. They feature robust construction materials that resist wear and tear, ensuring consistent performance over extended use. Moreover, both connectors are easy to install and come with various cable assemblies and adapters to cater to different environments and requirements, providing flexibility and convenience for users.

As technology continues to evolve, the RJ-11 and RJ-45 connectors remain crucial in maintaining seamless communication and data transfer capabilities, serving as reliable interfaces in an increasingly interconnected world. With their distinctive features and reliable performance, these connectors will continue to play a vital role in both telephony and networking applications for years to come.