[martin_bech]

I worked at a large ISP and telco in my youth, and ofc this is how its done, its been this way forever, and is also basicly how phone networks where and are built, because you know that everyone is not going to call everyone at the same exact time, so you use an Erlang B calculation to figure out what you actually need..

For reference ths ISP i worked for, that was pretty damn big, started out with 40 modems, and that lasted a looong time..

Btw. Biggest issue with traffic when i worked there was the advent of p2p sharing, that required massive upgrades