Digital mobile data communication system

摘要

A digital mobile data communication system includes a protocol converter in an exchange which simultaneously activates an FEC protocol receiver in a radio communication zone for modem communications at a rate of 2.4 Kbps and an ARQ protocol receiver in the radio communication zone for modem communications at a rate of 9.6 Kbps, and selects whichever one of the FEC protocol receiver or ARQ protocol receiver that has established receiving synchronization and the corresponding protocol transmitter.