Voice over IP Fundamentals


I am getting old and curriculums are one the most boring things I’ve ever read. So, my creative curriculum is below.

I live in the sunny island of Floripa, Brazil, the single most beautiful place in the world, married since 1988 with Clarice and father of Anna (28) and Pedro (32).


I’m a geek, entrepreneur and surfer, not necessarily in this order. With surf I learned a lesson, practice does not always lead to perfection!

My first technical achievement in life was to replicate the Start Trek’s Gorn Cannon in 1980. Something Myth Busters fail to do in 2009. Always loved fireworks and gunpowder. In 1981 I did the Kubrick’s cube. When there was no Internet or instructions.   I got my first computer in 1982.

After graduating in Mechanical Engineering in 1989, for the right reasons, I got a job in IT. The air conditioning on IT was much better than the one in the factory floor. I worked as a support analyst, network, and database administrator. I learned SQL at that time, the single most valuable training I have ever had. It is still very useful even after 30 years.

In 1993 I founded a Novell Education Center and became Master CNE and Master CNI. I owe Novell everything I know about teaching classes and provide training. What they did in the 90’s was groundbreaking in the industry and still a reference

In 1996 I founded my first company V.Office. A Cisco Integrator. One of my best decisions, we still have a large base of customers. Now after 25 years, 6 dozen professional tests and certifications such as CCNP/CCDP, CCSP and CCIE written, the company is a success and run almost by itself.

In 2006, for the right reasons, I have started a series of ventures related to VoIP and Asterisk. I wrote a book and training on Asterisk to be accredited in the market.  The motivation was to replace the expensive and obsolete gear from snob vendors.

In 2008 with the help of my Jedi friend Bogdan Iancu I wrote the book “Building Telephony Systems with OpenSER”, later updated to OpenSIPS. Together we have launched the OpenSIPS Bootcamp and the OpenSIPS Certified Professional certificate.

In 2010 after several years running IP PBXs, I decided to start a new company called SipPulse to develop soft-switches and high-volume telephony. SipPulse is one of my biggest successes having more than 300 active customers. It is now being managed by a professional administrator and doing very well.

This year, 2021 in the middle of the pandemic, for some wrong reason I didn’t figured out yet, I have started two new ventures and wehostvoip for VoIP hosting

I’m trying at least to make my courses a little more fun than the usual power point torture.

Voice over IP Fundamentals, Free Tutorials Download

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Author: Ho Quang Dai

I am Ho Quang Dai, from Vietnam – A country that loves peace. I share completely free courses from major academic websites around the world. Hope to bring free knowledge to everyone who can’t afford to buy

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