In data communication, a specification of the Electronic Industries Association (EIA) that defines the interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) employing serial binary data interchange. EIA-449, together with EIA-422 and EIA-423, is intended to gradually replace EIA-232 and is used for high speed data transmission (up to 10 Mbps). There is no international equivalent, although ISO 4902 is partly covered in 449.