Also worth mentioning that MCI, an AT&T competitor and thorn in their side, also had a microwave relay network. The M in MCI is for microwave. There's some grea

Also worth mentioning that MCI, an AT&T competitor and thorn in their side, also had a microwave relay network. The M in MCI is for microwave. There's some great info on MCI here: https://telephoneworld.org/long-distance-companies/the-history-of-mci/ https://telephoneworld.org/long-distance-companies/the-histo... For those not familiar MCI was a real innovator and an important part of internet history. Vincent Cerf, an internet giant, worked for MCI[1]. Sadly MCI was relegated to the dustbin of history as a result of the WorldCom scandal[2]. They are sadly just a part of Verizon Business today. [1] https://en.wikipedia.org/wiki/Vint_Cerf https://en.wikipedia.org/wiki/Vint_Cerf [2] https://en.wikipedia.org/wiki/WorldCom_scandal https://en.wikipedia.org/wiki/WorldCom_scandal