radio equipment with wireless communication between portable transmitter receiver equipment and selective call the participants themselves through a central

摘要

Equipment for calling people, with which the persons provided with portable send-receive units (1, 28) can be intercalled selectively through a send-receive processor (23). In order to have light portable units, these are built to send a signal according to a simple code (7). In the processor, conversion means (21) are provided to receive the calling signal, coded according to the simple code, and to convert it into a calling signal coded according to a reliable transmission code (13).