I worked for a picocell/femtocell company a few years ago, and when I started I had to get up to speed on GSM protocols. I remember thinking at the time somethi

I worked for a picocell/femtocell company a few years ago, and when I started I had to get up to speed on GSM protocols. I remember thinking at the time something along the lines of, "Connecting the call and telling your phone to ring are different messages, so if instead of sending the ring, waiting for a pickup, then connecting the call you just connected the call..."