CORDECT WIRELESS LOCAL LOOP SYSTEM PDF

To furnish the voice and voice band services to the local loop, the copper wire plays the role of a medium. From the year of , the demand for communication services has enlarged suddenly and the requirement for the telephone services in the developing countries increased. Now coming to the topic of a wireless local loop, it furnishes two ways of a telephone system and it includes the cordless system which is called as fixed radio wireless. Also See: H.

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It is the only cost-effective Wireless Local Loop WLL system in the world today that provides simultaneous toll-quality voice and 35 or 70 kbps Internet access to wireless subscribers. This alliance has resulted in many breakthrough concepts including that of an Access Network that segregates voice and Internet traffic and delivers each, in the most efficient manner, to the telephone network and the Internet respectively, without the one choking the other.

The SU has a standard two-wire interface to connect a telephone, cordless phone, or modem. The access system allows simultaneous telephone and Internet connectivity.

The AC must be scalable, serving as few as subscribers and as many as subscribers. In urban areas, the AC could be located at a street corner, serving a radius of m to 1 km.

This small radius in urban areas is important for wireless access, in order to enable efficient reuse of spectrum. When cable is used, the small radius ensures low cost and higher bitrate connectivity. However in rural areas, the distance between the AC and the SU could easily be 10 km even go up to 25 km in certain situations. The AC is thus a shared system catering to multiple subscribers. The voice and Internet traffic to and from subscribers can be concentrated here and then carried on any appropriate backhaul transport network to the telephone and Internet networks respectively.

At the AC, the telephone and Internet traffic is separated. The telephone traffic carried to the telephone network on E1 links using access protocols such as V5. As use of Voice-over-IP VoIP grows, voice traffic from subscriber traffic could also be sent to the Internet, gradually making the connectivity to the telephone network redundant.

However, for connecting to the legacy telephone network, the voice port of the AC may be required for some time to come. An AC could also incorporate switching and maintenance functions when required.

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Published on Dec 02, Abstract This report describes a new wireless local loop system for rapid expansion of telecom services developed under a joint project involving Indian scientists form Indian Institute Of Technology, Chennai, Midas technology and Analog Devices Inc. The new system, called corDECT, is based on microcellular architecture and uses a modest bandwidth of 20MHz to provide voice, fax, and data communication in low as well as very high subscriber density environments. The high capacity at a modest bandwidth is made possible without prior frequency planning through a completely decentralized channel allocation procedure called dynamic channel selection. This report discusses the relevance of corDECT in the context of current trends towards wireless systems, contrasts the microcellular architecture of corDECT with existing wireless systems based on macrocellular architectures, and outlines its market potential. The new system, called corDECT, is said to offer significant cost-savings, rapid installation, and improved reliability over traditional connections based on copper cables. The corDECT system is based on the European Digital Enhanced Cordless Telecommunications standard that uses a modest bandwidth of 20MHz in the MHz range and does not require prior frequency planning necessary in conventional mobile cellular systems. The corDECT technology uses relatively low-cost, easy-to-install subsystems and can serve relatively high subscriber density environments -several thousands of subscribers per square kilometer.

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The new system, called corDECT, is based on microcellular architecture and uses a modest bandwidth of 20MHz to provide voice, fax, and data communication in low as well as very high subscriber density environments. The high capacity at a modest bandwidth is made possible without prior frequency planning through a completely decentralized channel allocation procedure called dynamic channel selection. This report discusses the relevance of corDECT in the context of current trends towards wireless systems, contrasts the microcellular architecture of corDECT with existing wireless systems based on macrocellular architectures, and outlines its market potential. Introduction A new wireless local loop system to eliminate the physical connections between telephone exchanges and subscribers has just hit the market after a two-year long joint research effort by Indian and US engineers. The new system, called corDECT, is said to offer significant cost-savings, rapid installation, and improved reliability over traditional connections based on copper cables.

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