DATA TRANSMISSION FOR A MOBILE TELECOMMUNICATION SYSTEM COMPRISING A SIGNAL CARRIER MODULATED TO PROVIDE A MODIFIED V.110 FRAME OF FORMAT USED IN GSM

摘要

A data signal for a mobile telecommunications system, comprises a signal carrier modulated to provide a 36 bit modified V.110 frame of the format conventionally used in GSM, with a predetermined number of data bit and control bit positions, wherein some of the control bit positions of the frame contain data bits.