We have come across many types of communications by now. it was started with the trunk calling Then we could see faxing, then later comes that we shifted to PSTN calling, then as we had Optical fiber communications for faster communication. Later it came the cellular world where we were using GSM, CDMA. Now its the period of 3G, 4G etc. There is full scope for new future technologies. One among the technologies will be VoIP calling and VoIP phones.
VoIP is called as Voice Over Internet Protocol. It is a type of internet protocol where we it is purely voice based. VoIP made its first stepping stone when internet came into picture however 1995 was the year when VoIP was noticed by the maximum people. It has helped various business houses and individual into various ways like cutting costs, cheap communication, globalization and transparency. It is starting to replace PSTN networks in recent times. It is the system which transfers the voice input through various methods called signalling, digitalizing etc.
It is a protocol which is transfered through PSTN networks in a much lower cost. the main problem is that the calls can be hacked very easily. there is very less security in the network rather than ordinary PSTN networks. VoIP calls are very cheaper. The standard protocols used in VoIP will be H.264, H.323, Media Gateway Control Protocol (MGCP) , Session Initiation Protocol (SIP), Real Time Transport Protocol (RIP), Session Description Protocol (SDP).
Now it is the season for Smart Phones and Soft Phones. Here VoIP calling is used which makes it very cheaper. VoIP call is made from System ( computer ) to mobiles in a cheapest possible way. Both Video and audio are transmitted through PSTN networks. To make a call we need two systems one network and one VoIP phone. There is a special applications where we could support VoIP calls. Skype is one of the service provider for VoIP calls. For any VoIP Calls requires a broadband connection to the Internet (Land line, ADSL, etc.), Note that for one user to connect at speeds of 256 kbit/s for incoming flow, and 128 kbit/s for outgoing would be sufficient. If multiple users, the channel will expand. Hardware Requirements are not so rigid.
The recent service providers for VoIP calls will be Voiptalk, Skype, Myvoipprovider etc. The uses of VoIP call will be
1. Cheaper calls to any person in the world
2. Reach to every person faster and clear
3. Flexible with different broad bands
4. Integration with other services with internet is done
5. Not much complicated devices necessary
6. Video Conferencing can be done easily
We were speaking about cheaper call rates. the a Skype call the voip calls will cost only 2 cents per minute. It is best suited for long distance calls. two or more person can have conversation together. there is much information avaliable in the following that why we should use VoIP and why is the call rates cheaper and how to use VoIP calls in daily life by a common person.
This is a emerging technology in India. The technology is still backward in India where they are trying to implement this everywhere all over the world.
There are draw backs in this network
1. There is less security, can be hacked very easily.
2. The operability between PSTN and Internet is less
3. It is difficult to make emergency calls to the people
4. There is a up coming technology of Mobile number portability which affects VoIP calling
As the days progressing the technology also increasing day by day. VoIP is the main thing in the near future. There are still research going on to make it more secured and more easier for the people to use them. India is still emerging with 3G technology and long way to go for VoIP technology. So lets hope that we get a secured VoIP calling facility.
-Vivek G
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