Glossary

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; for example, a data/FAX modem device. Devices may be physical, electrical, addressable, and logical.

Downstream

The direction of data flow from the host or away from the host. A downstream port is the port on a hub electrically farthest from the host that generates downstream data traffic from the hub. Downstream ports receive upstream data traffic.

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Philips 170B2M user manual Device
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170B2M specifications

The Philips 170B2M is a well-designed monitor that stands out for its combination of performance, functionality, and environmental sustainability. Aimed primarily at business professionals and home office users, this monitor features a 17-inch display that offers vibrant visuals and crisp image quality, making it suitable for a wide range of applications.

One of the key features of the Philips 170B2M is its excellent display technology. The monitor utilizes a 1280 x 1024 resolution, which delivers sharp images and clear text, ensuring that users can comfortably engage in activities such as spreadsheet work, graphic design, or video streaming without straining their eyes. The monitor also employs advanced color reproduction techniques, resulting in a rich palette that enhances both graphics and videos.

The 170B2M comes equipped with an adaptive sync technology that reduces screen tearing and stuttering, creating a seamless viewing experience, particularly for those who enjoy gaming or watching action-packed films. Philips' SmartContrast technology automatically adjusts contrast settings based on the content displayed, optimizing the visuals for different use cases.

Additionally, the monitor features a range of connectivity options, including VGA and DVI ports, which ensure compatibility with various devices. This flexibility is particularly beneficial for users who may need to connect multiple computers or laptops throughout their workday.

Another important characteristic of the Philips 170B2M is its focus on sustainability. The monitor is designed with eco-friendly materials and incorporates energy-saving technologies. The Energy Star certification demonstrates the product's efficiency, lower energy consumption, and reduced carbon footprint, appealing to environmentally conscious users and businesses looking to promote sustainable practices.

Ergonomically, the Philips 170B2M offers height-adjustable and tiltable features, allowing users to customize their viewing positions for maximum comfort. This is particularly valuable for extended work sessions, as it helps reduce neck and back strain.

In summary, the Philips 170B2M is a versatile monitor that combines high-quality display capabilities with sustainability and ergonomic design. Its features make it an excellent choice for both corporate settings and home offices, catering to users who value both performance and environmental responsibility. Whether for professional tasks or leisure activities, the 170B2M delivers an efficient and enjoyable experience.
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