ITU-R BT.1126-1994 Data Transmission Protocols and Transmission Control Scheme for Data Broadcasting Systems Using a Data Channel in Satellite Television Broadcasting
that a common transmission protocol should be applied to the data channel of both the digital sub-carrier NTSC system (recommended in Recommendation ITU-R BO.650) and the MUSE system (recommended in Recommendation ITU-R BO.786)
ITU-R BT.1126-1994 history
1994ITU-R BT.1126-1994 Data Transmission Protocols and Transmission Control Scheme for Data Broadcasting Systems Using a Data Channel in Satellite Television Broadcasting