The technological advances in each stage of humanity have led to a total change in the way we communicate and have broken paradigms on the interactions between people and machines. Concepts such as the Internet of Things and Unified Communications are a reality that we use every day easily both at the family and business level. However, every technological development has a turning point that allows to take a big leap and this could be when we begin to send our voice through the internet.

Voice over IP (VoIP) basically sends the analog voice in digital form through data packets thanks to use the IP protocol (v4 - RFC 791 and v6 - RFC 2460) using every network that supports the traffic of this protocol. In fact, this definition may be short considering that today there are different Gateways and SBCs (Session Border Controllers) that allow integrating PSTNs (Public Switched Telephone Network) to this technology.

The correct use of VoIP technology and the different developments this field has had, allowed companies from all sectors to revolutionize the way they communicate with their customers and suppliers. In addition, today it is normal to see companies that complement and strengthen themselves with global trends such as "teleworking" because they can have all its members anywhere in the world working as if they were all in the same office.

Similarly; in research, the fields of study that derive from this technology grow exponentially due to our need to have a completely unified communications system that can offer wide mobility and also integrates everything we use every day. Challenges that fit into what we know as the Internet of Things and Unified Communications.

All this information has been theoretical but also very illustrative about all the opportunities offered by Voice over IP and the best of all is that many of the advances are based on open source projects, which means that anyone with interest and passion of any part of the world can learn, participate and propose ideas. This is going to be our learning base and commitment to understand the VoIP world and all its advantages.