Some of the largest and most hardened at&t long lines sites around the 48 states, most of which are still in existent, carried AUTOVON traffic. Some of them are

Some of the largest and most hardened at&t long lines sites around the 48 states, most of which are still in existent, carried AUTOVON traffic. Some of them are literally massive concrete bunkers built on top of mountains, with roads bulldozed to the top, that if you tried to duplicate today would probably cost $75 million per site. Significantly less useful in an era when inter city phone and data traffic goes by fiber optic cable and not 6GHz microwave on horn antennas. Some have found re-use for cellular purposes and vhf/uhf radio repeater, public safety, etc. Some of the key long lines and AUTOVON sites out there also carried data circuits linking the SAGE network together.