Missed by this much!
Radio hams will probably sharpen their pitchforks when they find AT&T still likes the idea of power line transmissions in the 30 – 300 MHz bands – enough, at least, to file a patent for it.
30-300 GHz is not the same frequency band as 30-300 MHz. Just by a factor of a thousand. Besides, as I recall, UHF (30-300 MHz) doesn't do surface wave propagation.