Recommendation ITU-T J.383 describes the conversion schemes of data structures defined in [ITU-R BO.2098-0] for cable television systems on the basis of [ITU-T J.382]. [ITU-R BO.2098-0] specifies two data structures, MPEG-2 TS and TLV. MPEG-2 TS data packets are directly transmitted while any transmission control signals and service information are transmitted using a descriptor specified in [ETSI TS 102 991]. TLV packets are not directly transmitted in TLV format but converted to GSE [6] packet format specified in [ITU-T J.382]. The EWS control signal specified in [ITU-R BO.2098-0] is also converted into physical layer signalling specified in [ITU-T J382], to wake up the receiver when the Emergency Warning System is activated.