IMPROVEMENTS RELATING TO TRANSMISSION IN RESTRICTED COMMUNICATION NETWORKS

摘要

A process for encoding messages in a communication network where transmission of certain characters is restricted. Messages are encrypted using a predetermined algorithm, encrypted messages are then encoded using a predetermined algorithm which transforms prohibited characters into permitted characters. A reverse message decoding process is also given. The embodiment illustrates use in a 7 bit paging network, particularly in relation to the POCSAG coding scheme.