Recently, Voice over Internet Protocol(VoIP) pops up as one of the hottest technologies in the world. VoIP is a method for taking analog voice signal, turning it into digital signal, and transmitting it over the Internet connections. This in turn enables users to make Internet phone calls without going thru the phone company service.

As the technology is now getting more reliable and offers much lower rates, it has gained huge popularity for long distance voice transfers over traditional analog long distance services. Some even see VoIP as the revolutionary technology that will replace the conventional phone systems entirely.

How VoIP works?

VoIP phone calls is done in three stages: Encrypting the analog voice signal (the caller