there's a guy who published a photo book: https://99percentinvisible.org/article/vintage-skynet-atts-abandoned-long-lines-microwave-tower-network/ https://99pe

there's a guy who published a photo book: https://99percentinvisible.org/article/vintage-skynet-atts-abandoned-long-lines-microwave-tower-network/ https://99percentinvisible.org/article/vintage-skynet-atts-a... but I think most of the info is online and from internet-based hobbyists and retired AT&T long lines people who staffed some of these sites.