Thanks for the post very interesting I would still like to see them declassify Echelon.Doesn't exist; find a real telco or 'switch' engineer in your church or social group and ask about their 'Echelon Trunk' back to wherever (Langley?) ... doesn't exist.
Or ask them about the 'Echelon racks' in their local telephone central office (CO) 'switching' exchanges ... they don't exist. Never did.
They didn't exist in our MTSO (mobile telephone switching office) either ... none. No trunks, no 'Ecehelon racks'.
Maybe a little more research is in order. I’m thinking NSA.