An automotive emergency response system (AERS) for aftermarket devices defined in Recommendation ITU-T Y.4119 is designed to bring rapid assistance to driver and passengers involved in accidents.

For a normal operation purpose of the AERS, an accident related data (so-called minimum set of data, MSD) needs to be sent from an automotive emergency detection device (AEDD) to an automotive emergency response centre (AERC).

Recommendation ITU-T Y.4468 specifies an MSD transfer protocol to provide the rules of MSD transfer operations between an AEDD and an AERC in an AERS.