Glossary

USB eliminates "case angst" -- the fear of removing the computer case to install add-on peripherals. And USB also eliminates adjustment of complicated IRQ settings when installing new peripherals.

USB does away with "port gridlock." Without USB, PCs are normally limited to one printer, two Com port devices (usually a mouse and modem), one Enhanced Parallel Port add-on (scanner or video camera, for example) and a joystick. More and more peripherals for multimedia computers arrive on the market every day. With USB, up to 127 devices can run simultaneously on a computer.

USB permits "hot plug-in." There's no need to shut down, plug in, reboot and run set-up to install peripherals. And no need to go through the reverse process to unplug a device.

In short, USB transforms today's "Plug-and-Pray" into true Plug-and-Play!

Hub

A Universal Serial Bus device that provides additional connections to the Universal Serial Bus.

Hubs are a key element in the plug-and-play architecture of USB. The Figure shows a typical hub. Hubs serve to simplify USB connectivity from the user's perspective and provide robustness at low cost and complexity.

Hubs are wiring concentrators and enable the multiple attachment characteristics of USB. Attachment points are referred to as ports. Each hub converts a single attachment point into multiple attachment points. The architecture supports concatenation of multiple hubs.

The upstream port of a hub connects the hub towards the host. Each of the other downstream ports of a hub allows connection to another hub or function. Hubs can detect, attach and detach at each downstream port and enable the distribution of power to downstream devices. Each downstream port can be individually enabled and configured at either full or low speed. The hub isolates low speed ports from full speed signaling.

A hub consists of two portions: the Hub Controller and Hub Repeater. The repeater is a protocol- controlled switch between the upstream port and downstream ports. It also has hardware support for reset and suspend/resume signaling. The controller provides the interface registers to allow communication to/from the host. Hub specific status and control commands permit the host to configure a hub and to monitor and control its ports.

Device

A logical or physical entity that performs a function. The actual entity described depends on the context of the reference. At the lowest level, device may refer to a single hardware component, as in a memory device. At a higher level, it may refer to a collection of hardware components that perform a particular function, such as a Universal Serial Bus interface device. At an even higher level, device may refer to the function performed by an entity attached to the Universal Serial Bus;

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Philips 107B50 user manual Hub

107B5, 107B50 specifications

The Philips 107B50 and 107B5 are notable monitors that have made a mark in the realm of computer displays. Known for their solid performance, these models are designed with features that cater both to casual users and professionals alike.

The Philips 107B50 is a 17-inch CRT monitor that has gained a reputation for its robust build quality and reliable performance. It supports a maximum resolution of 1280 x 1024 pixels, ensuring sharp and clear images for various applications, from everyday office tasks to detailed graphic work. The monitor's refresh rate is optimal, providing a flicker-free experience that reduces eye strain during long usage sessions. Additionally, the 107B50 incorporates advanced dot pitch technology, contributing to its ability to display fine details with precision.

The Philips 107B5, also a 17-inch CRT model, shares many characteristics with its counterpart. It also delivers a maximum resolution of 1280 x 1024 pixels and features a similar refresh rate, which helps in delivering smooth visuals. One distinguishing factor of the 107B5 is its enhanced color accuracy, making it a suitable choice for graphic designers and photographers who require precise color representation.

Both monitors come with various connectivity options, including standard VGA inputs, making them compatible with a wide range of systems. They feature adjustable brightness and contrast settings, allowing users to customize their viewing experience according to their preferences or ambient lighting conditions.

In terms of design, both the 107B50 and 107B5 sport a classic aesthetic, aligning with the typical look of CRT monitors. They are built with ergonomics in mind, featuring adjustable stands that allow users to position their screens for optimal viewing angles.

Energy efficiency is another noteworthy aspect of these monitors. While CRT technology is generally less energy-efficient than modern LCDs, Philips has integrated energy-saving features to help minimize power consumption, which is beneficial for both the environment and the user's electricity bill.

In conclusion, the Philips 107B50 and 107B5 monitors combine solid performance with practical features, making them reliable choices for anyone in need of dependable display technology. While they may not rival the sleek designs and energy efficiency of modern LCD displays, they remain valuable assets in various settings. Whether for home use, office tasks, or creative work, these models continue to hold a place in the hearts of users who appreciate their proven capabilities.