Board Thread:Speculation House/@comment-14138255-20151213162620/@comment-24994749-20151225200239

The CCT also seems to connect everything completely wireless (that's one hell of a powerful antenna if it does)... so I expect word on how attempts to build communication lines using cable were futile because, without the guard of the kingdom walls, they would be destroyed by the Grimm.

Either that or we learn there are repetitive antennas in between points in the wild, and hunters are hired to guard them.