implimentation of landline switching system using vhdl

A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) refers to a phone that uses a metal wire or fibre optic telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission. In 2003, the CIA reported approximately 1.263 billion main telephone lines worldwide. China had more than any other country at 350 million and the United States was second with 268 million. The United K ....etc

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ABSTRACT
The objective of this project is to design an embedded system which can control appliances remotely. This project is designed to study the basic implementation of DTMF (Dual Tone Multi Frequency).
The DTMF signal is composed of high frequencies & low frequencies. Each key is assigned a low frequency and a high frequency. When a particular key is pressed, the frequencies those are specific to that particular key are transmitted. Therefore, no two keys will have a same set of low & high frequencies ....etc

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fuel cells in aerospace
pilots do not have to rely only on its jet fuel to power its aircraft. They could turn to fuel cells to supply at least some of the onboard systems Fuel cells can convert various kinds of fuel, such as hydrogen, natural gas or even Jet fuel used in commercial aircraft into energy without combustion, making them cleaner and quieter alternative to planes. ....etc

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I want a power point presentation on wireless messaging through landline ....etc

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To get full information or details of sms on landline telephone please have a look on the pages

http://seminarsprojects.net/Thread-sms-through-landline

if you again feel trouble on sms on landline telephone please reply in that page and ask specific fields in sms on landline telephone ....etc

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a powerpoint presentation slides on bio-telemetry system. ....etc

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to get information about the topic landline telemetryfull report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-telemetry?pid=54188&mode=threaded

http://seminarsprojects.net/Thread-telemetry ....etc

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To get full information or details of project customer satisfaction for landline please have a look on the pages

http://seminarsprojects.net/Thread-customer-satisfaction-on-mobile-service-provider-networks

if you again feel trouble on project customer satisfaction for landline please reply in that page and ask specific fields in project customer satisfaction for landline ....etc

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SMS through Telephone using AT89S8252
This system can transmit message or text through ordinary Land Line Telephone from one end (source) to another end (designation). The tecnology used is the DTMF(Dual Tone Multiple Frequency). technology. The system has two sections one for editing the text and to transmit the edited text and the other section consist for receiving the text message.There are several steps for this project:
* DTMF decoding/Encoding process
* Ring sensing
* ON/OFF hook detection
* Displaying the message in LCD
T ....etc

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pls send ppt for dis topic
Abstract

This work will address the challenges to facilitate the
development of a high capacity radio system for a small,
miniaturized electronic pill device that can be swallowable or
implantable in human body in order to detect biological signals
or capture images that could eventually be used for diagnostic
and therapeutic purposes. In addition to reviewing and
discussing the recent attempts in electronic pill technology, a
wideband (UWB) telemetry system aimed for the development
of an electronic pill ....etc

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