In the early years of 21st century, the VoIP phone service has brought in a revolution of all sorts in the communication industry. The advanced IP telephony services deliver unified communication over the internet. The media-rich collaborative applications wherein voice, video, data and images are sent simultaneously have unified communications to a significant extent. As a natural corollary, the voice over IP service has gained in popularity among various business entities.

The small and medium sized enterprises as well as individual users are considering the IP telephony solutions for their day-to-day communications. As a matter of fact, it can be said that they are moving ahead on the footsteps of the large business or corporate houses. The business entities are opting for the VoIP services to improve their internal operations while, the individual users are happy with the significant reductions in the phone bills.

The advanced VoIP phone services allow the users to enjoy long distance and international calls at significantly lower rates. This is possible due to the internet that allows the unified communication over the packet switching technique.

The best part of VoIP phone service is that the subscribers can use the pre-existing fixed line phones as well as mobiles.

As of now, the situation is such that the VoIP service is on the edge of replacing traditional PSTN system to a large extent, if not fully. The internet VoIP phone service provide ease and convenience of talking over the internet. As a matter of fact, such services are turning to be appropriate for frequent travelers and busy professionals as well. It keeps the employees or users connected with the business or others, even when the employee or the user is on the road or at home.

Some other task that such a phone service can facilitate over the traditional PSTN phone services are:

1. The VoIP phones are location friendly that can be operated from anywhere, as only internet connection is required to connect with others.
2. Incoming phone calls are automatically routed over internet, regardless of where the users are located at specific points in time. Therefore, frequent travels or others can enjoy calling at cheaper rates, even when they are on a trip.
3. The users can enjoy unlimited long distance and international calls with VoIP phone services at relatively lower rates. As a matter of fact, one can save up to half the cost of PSTN monthly bills.
4. Unlike PSTN services, the VoIP phones can be used to avail new and value added services that are available over the internet such as video conversation; messaging or data file exchange in parallel with the conversation, audio conferencing and passing of information.

VoIP services follow the IP process, wherein voice calls or images are routed over a broadband speed internet. As a matter of fact, there are three ways of transmitting the calls namely - IP phones, PC to PC communication and Analog Telephone Adaptor or ATAs. The users could opt for anyone to facilitate unified communication over the diverse destinations and without much trouble.