This International Standard determines the logical structure of using dedicated short-range communication (DSRC) with an OSI (open systems interconnection) application layer as a CALM medium for IP communications. DSRC to which MAIL is applicable are those with an application layer compliant with ISO 15628, and the standards of such DSRC include the following: — ARIB STD-T75 DSRC (Japan); — TTAS.KO-06.0025 DSRC in the 5,8 GHz band (Korea); — EN 12253 DSRC physical layer using microwave in the 5,8 GHz band, EN 12795 DSRC data link layer and EN 12834 DSRC application layer (Europe). Figure 1 shows the architecture of the MAIL, which can be considered as a specific extension of the communication adaptation layer (CAL) specified by ISO 21218. NOTE In furnishing additional information on CALM MAIL, reference can be made to ARIB STD-T88 (DSRC application sub layer).