"What are you talking about. There has not been such a thing as a transmission tower for 500 years now." Matsuko points out.
[spoiler]Of course, Flay had no means to know that, but anyone with a good Knowledge: Arcana mod knows that magic travels mostly through leylines. Even when it goes airborne, there is no need for retransmission. Unlike radio waves, which require contact with the ionosphere to travel, magic can establish a channel between two or more spots directly.[/spoiler]