CELLEOPBYGGET RADIOTELEFONSYSTEM

摘要

A data message transmission system for a cellular radio telephony system is described. Data which is to be sent is converted to a format which is compatible with radio transmission, prior to the radio transmission. The data is reconverted to its original format after reception. A transfer is carried out by stopping the data transmission before the transfer and recommencing the data transmission after the transfer. Call monitoring is carried out via busy-idle bit coding. <IMAGE>