Yes @Koushik_Ray, I agree.
The only point that really intrigues me is how do people pay hundreds of dollars for some “specific” training if in places like this forum here they get this information for free? 
The Telecommunications area is for “self-taught” people, if you’re not like that, better look for another area. 
Just see how it works in companies - you have to “find a way” to learn everything, and quickly, and alone… Training are often only introduction, you need to go deep by yourself in any matter.
And that’s where my doubt comes in: we have a perfect place for this, our community, which is the BIGGEST in the World for Telecommunications, with everything FREE. And even so, only a few dozen actively participate. 
Not to mention, of course, those who fall by parachute just asking for books, documents, etc… They don’t understand the treasure they have, the Community.