Radio paging communication system

In a radio paging communication system, an exclu­sive input device such as a personal computer capable of inputting alpha-numeric code data and a normal key telephone are included for inputting message data to an alpha-numeric paging receiver. The alpha-numeric paging receiver includes a circuit (25) for detecting a speci­fic code in the message data. In order to input message data from the key telephone set, the specific code is input prior to input of the message data. The paging receiver displays data following the specific code as numeric code data.