Repeaters are devices that function to receive signals that contain data in a network. By using a repeater, the network coverage will be wider. The repeater receives a signal and then re-emits a signal that is identical to the original signal, but in a different way. Generally repeaters retransmit the signal in a frequency different from the original
Radio Station License or ISR is a permit issued by the Directorate of Resources and Equipment of Post and Information Technology as one of the types of permits for the use of radio frequency spectrum and satellite orbit.