[Richard]

I have searched for you and yet to find a proper diagram. One thing i have noticed in the past few years is that the internet is a lot dumber since the deregulation of providers. Big business has taken it over. Mostly adds and what they want you to see now. Really have to dig to get something useful. Even then, it can be a fruitless endeavor. I will look in my books to see if there is anything useful.