About SIP VoIP

Communication world has been revolutionized by Voice over Internet Protocol (VoIP) and it is one of the fastest growing technologies of today’s world. In its initial stage i.e. in the year 1995 when it was first used, like any other technology it has faced criticism.

In the beginning VoIP could be used for communication between two computers, but now it has progressed to a level where no computer is needed for communication. Only a VoIP adapter connected to standard telephone line helps you in using this latest technology without having the need to connect with Internet connection for the same.

For code usage, termination and voice data packets transmission, agreed-upon interfaces or protocols are used by VoIP and VoIP has shown great progress in this area. VoIP has developed Session Initiation Protocol (SIP) which is one of the strongest protocols.

Microsoft –leader in the industry has adopted SIP VoIP and hence it gives SIP has an edge over other protocols. In most of the countries public service telephone network or PSTN is connected with SIP VoIP telephone using gateways even if SIP functions inside the Internet domain.

Functioning of SIP

For connecting a user on an IP network, SIP VoIP functions by “dialling” a proxy server. The user, you wish to be connected with is searched by the SIP based VoIP phone, using an IP address in place of telephone number.

For locating the user you want to connect with, would also be traced by SIP VoIP by searching for the username on an IP network as most of the IP addresses are not static or fixed. They are mostly dynamic that is they keep changing.

Two users get connected instantly when SIP VoIP finds out that the other party is hooked up. In case the other party is already using the phone line, SIP VoIP initiates a call waiting tone or the call is forwarded to voice mail.

If you are SIP VoIP user, you can receive local calls for free by selecting the area code of your choice and you can carry your telephone to any place in this world.

This happens because the phone is not bothered or does not know where you are located. The only thing that matters is that it is connected with the internet. SIP VoIP provider is informed, about it being online once you log into the internet.

There is not doubt about the fact that the SIP VoIP is going to be the leader in the VoIP world which is highly competitive, because of its portability. You are already paying for the broadband Internet connection and SIP VoIP uses it more effectively for making calls too. And since it offers lots of cost saving it will emerge has one of the leaders in telecommunications.