Instant Wireless® Series

To achieve true seamless connectivity, the wireless LAN must incorporate a number of different functions. Each node and access point, for example, must always acknowledge receipt of each message. Each node must maintain contact with the wireless network even when not actually transmitting data. Achieving these functions simultaneously requires a dynamic RF networking technology that links access points and nodes. In such a system, the user’s end node under- takes a search for the best possible access to the system. First, it evaluates such factors as signal strength and quality, as well as the message load currently being carried by each access point and the distance of each access point to the wired backbone. Based on that information, the node next selects the right access point and registers its address. Communications between end node and host computer can then be transmitted up and down the backbone.

As the user moves on, the end node’s RF transmitter regularly checks the sys- tem to determine whether it is in touch with the original access point or whether it should seek a new one. When a node no longer receives acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it then re-registers, and the communication process continues.

What is ISM band?

The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available worldwide. This presents a truly revolutionary opportunity to place convenient high-speed wireless capabilities in the hands of users around the globe.

What is Spread Spectrum?

Spread Spectrum technology is a wideband radio frequency technique devel- oped by the military for use in reliable, secure, mission-critical communica- tions systems. It is designed to trade off bandwidth efficiency for reliability, integrity, and security. In other words, more bandwidth is consumed than in the case of narrowband transmission, but the trade-off produces a signal that is, in effect, louder and thus easier to detect, provided that the receiver knows the parameters of the spread-spectrum signal being broadcast. If a receiver is not tuned to the right frequency, a spread-spectrum signal looks like background noise. There are two main alternatives, Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS).

What is DSSS? What is FHSS? And what are their differences? Frequency-HoppingSpread-Spectrum (FHSS) uses a narrowband carrier that changes frequency in a pattern that is known to both transmitter and receiver. Properly synchronized, the net effect is to maintain a single logical channel. To

Wireless-G Notebook Adapter

an unintended receiver, FHSS appears to be short-duration impulse noise. Direct-Sequence Spread-Spectrum (DSSS) generates a redundant bit pattern for each bit to be transmitted. This bit pattern is called a chip (or chipping code). The longer the chip, the greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during trans- mission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most nar- rowband receivers.

Would the information be intercepted while transmitting on air?

WLAN features two-fold protection in security. On the hardware side, as with Direct Sequence Spread Spectrum technology, it has the inherent security fea- ture of scrambling. On the software side, WLAN offers the encryption function (WEP) to enhance security and access control.

What is WEP?

WEP is Wired Equivalent Privacy, a data privacy mechanism based on a 64-bit or 128-bit shared key algorithm, as described in the IEEE 802.11 standard.

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Panasonic WMP54G manual What is ISM band?

WMP54G specifications

The Panasonic WMP54G is a wireless multimedia player designed to seamlessly stream digital content throughout your home. This innovative device is a perfect blend of convenience and technology, allowing users to enjoy their favorite music, photos, and videos from various sources without the need for complex setups or extensive wiring.

One of the standout features of the WMP54G is its support for a wide array of multimedia formats. Users can play MP3, WMA, JPEG, and MPEG-4 files, making the device incredibly versatile and accommodating for various media types. This flexibility ensures that users can access their entire multimedia library without worrying about format compatibility.

The WMP54G uses advanced wireless technology to connect to home network environments. With its integrated Wi-Fi capabilities, users can easily connect the device to their existing wireless network, allowing for seamless streaming from their PC or network-attached storage devices. The technology ensures stable connectivity with minimal interruptions, which is crucial for a smooth viewing or listening experience.

Another significant aspect of the WMP54G is its user-friendly interface. The device is designed with simplicity in mind, featuring an intuitive menu structure that allows users to navigate their content easily. The remote control also enhances usability, giving users the power to manage their media playback from a distance without needing to get up from their comfortable seats.

The WMP54G is also equipped with a robust set of audio and video outputs, including HDMI and composite outputs. This flexibility in connectivity options ensures that users can easily connect the device to a variety of televisions and audio systems, enhancing the overall home entertainment experience.

For those who value high-quality output, the Panasonic WMP54G delivers impressive audio performance. With high-definition audio processing capabilities, users can enjoy rich, clear sound whether they’re listening to music or watching films.

In summary, the Panasonic WMP54G is a feature-rich wireless multimedia player that excels in flexibility, connectivity, and user experience. With its support for multiple file formats, advanced wireless technology, and high-quality audio and visual outputs, it represents an excellent choice for anyone looking to enhance their home media setup. Whether you're a music lover, a movie buff, or someone who simply enjoys sharing photos, the WMP54G meets and exceeds modern entertainment needs. Its combination of performance and ease of use makes it a notable device in the realm of multimedia players.