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Advanced Analog Phones System
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ABSTRACT
Analog mobile phones (Advanced Analog Phones System) are the first generation mobile communication system. The second generation mobile communications system are such as Global system for mobile communication (GSM) , Code Division Multiple Access(CDMA) and IS-136 use digital techniques to achieve better performance, quality, security , and spectral efficiency. The third generation mobile communication is expected to provide high quality global roaming capability for voice, data, internet browsing, and multimedia applications. It uses Intelligent Antenna (IA), to improve the performance of radio systems by embedding electronics intelligence into the spatial processing unit. Spatial processing includes spatial precoding at the transmitter and spatial postcoding at the receiver, which are dual each other from information signal processing theoretic point of view. Intelligent antenna is technology which represents smart antenna, multiple antenna (MIMO), self-tracking directional antenna and so on.
ACKNOWLEDGEMENT
I am thankful to GUIDE, for allowing me and giving me an opportunity to do my seminar.
I am thankful to Prof. Sangram Mudali our honourable Director for allowing us and giving us an opportunity to prove our capabilities and I also thankful to Prof. Geetika Mudali, our Placement director and last but not the least the faculties and my friends under whose guidance I have completed the course.
1. INTRODUCTION
Over the past decade, wireless communications has seen an exponential growth and will certainly continue to withness spectral development due to the emergence of new interactive multimedia applications and highly integrated system. However, broadband data access at high transmission rates will be needed to provide users packet-based connectivity to a plethora of services. It is also certain that the neXt Generation (XG) wireless system will consist of complementary system with a set of different standards and technologies along with wireless connection between mobile and machines, game systems, desktop computers, cellular phones, consumer electronic products, and hand-held devices. A key requirement in future wireless system is ability to provide broadband connectivity with end-to-end Quality of Services (QoS) ,a high network capacity, and throughout at a low cost. This talk will discuss about multi-antennas using 3G mobile communications network from GSM(Global System For Mobile Communication) to 3G (Third Generation)and to cdma2000 and WCDMA and also describe some leading enabling Technology and comparison of cdma2000 and WCDMA.
9. CONCLUSION
In SISO is known as Single input and Single output. In radio it is the useof only one antenna both in the transmitter and receiver. SISO systems are typically less complex than Multiple-Input Multiple-Output systems but MIMO uses multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology. By using Multi-antenna. MIMO technology which has attracted attention towards wireless communications, because it offers significant increases in data throughput and link range without additional bandwidth or transmit power. Using this technology we can achieve higher spectral efficiency (more bits per second per hertz of bandwidth) and link reliability or diversity (reduced fading).
Comparing analog phones with VoIP (Voice over Internet Protocol) telephone systems is like comparing a basic phone to a computer. An analog phone is a basic phone that can connect and is instantly ready to use, but VoIP is a bit more complex than that. Analog phones are probably what you still have at home (if you still have a home phone); They are reliable, easy to use and familiar, but they can probably only offer you a lot.

An analog telephone system, also commonly known as a POTS, converts voice signals to electronic signals that travel over the telephone line until they reach the destination. These voice signals can travel in two ways - from one phone to another and vice versa - because the telephone system offers two-way communication. Users who communicate with each other using POTS or analog systems are connected through a copper wire subscriber loop that extends from a central exchange to many homes and businesses. Subscribers are assigned to a phone number that allows them to contact others.

If you do not know anything about VoIP, it is a system that converts analog telephone signals into digital signals and runs your telephone system on an IP network through its own IP address or Internet, combining voice and data on a secure network. Digital signals that are being converted can be delivered over the Internet from one home or business to another. This method of communication is cost effective and easy to use. Of course, its features may differ depending on the size of your business, but it is generally the same idea for small and large companies alike. So, why are more companies turning to VoIP (Voice Over Internet Protocol) communication and abandoning their conventional fixed lines? VoIP communication systems offers several advantages for small and large companies.

VoIP communication systems offer a secure and quality service, managing calls through their own private networks. VoIP also offers more features than a traditional analog phone such as voicemail, caller ID, Internet fax, virtual receptionists, advanced call detection and forwarding, integrated office software and sending voice mail to a personal email or phone cell phone. Advanced technology has even provided access to web and video conferencing with VoIP.

Business VoIP services are generally cheaper than traditional telephony services, even with all the additional features listed above. There is less hardware to buy or lease, if any, and monthly subscription fees are lower. Several hosted providers offer applications for smartphones that allow the user to make and receive calls through their data connection that can be connected to their office phone or left as a stand-alone option. Adding new extensions is also an easier task with VoIP communication systems.

Among all these advantages of VoIP is the increase in productivity. Choosing the VoIP communication system simplifies and combines your communication tools. This is a step beyond analog or traditional telephone lines.

While your analog equipment may be running for your small business, consider choosing a VoIP communication system for additional benefits such as security, enhanced productivity, and features such as caller ID, voice mail forwarding, and call screening.

At SecurCom, we have the ability to supply various sizes and types of telephone systems. If you need a pair of phones for hundreds of phones, we have the solution that is right for you. Contact SecurCom today to find out which phone system is right for you.