Apparatus and instruments for recording, transmitting and/or receiving sound, data or images, namely radio transmitters and receivers, trunked radio network systems and simulcast radio network systems, namely, networked mobile radio transceivers, a base station, a repeater, a computer-controlled database for allocation of radio frequencies, and a computer control module; portable and mobile radio apparatus, namely handheld radios, vehicle mounted radios, portable radio telephones and parts an...