I am guessing it does, because you can’t communicate by just downloading data : You have to upload too!
Handshakes and stuff… 
Oh, come on! Arguments or deference are more reasonable actions. (This is googlable!)
I guess that teaches me for pressing like before an edit.
There is also a special place in hell for videos titled in English, but not actually ion the language.
I guess it was some other talk i had seen. No credentials (listed), no slides, no nothing? O.o
CCC as i know it is better than that - the Osmocom guys are awesome, but i have no idea about that talk.