A series of radio frequency bands which, in principle, by the FCC for broadcast television with the use of the signals, wave, etc. is designed . The FCC's rules for MMDS was changed up to the possibility that the service, data, high speed ( broad ) with the use of this spectrum based . MMDS includes the bands near 2.7 GHZ , 2.5 , 2.3 , 2.1 . A tower MMDS can range 35-30 mm .