CAN/CSA-ISO-4903-95 (R2013)

This National Standard of Canada is equivalent to International Standard ISo 4903:1989. 1 Scope This International Standard specifies the 15-pole connector and the assignment of contact numbers at the interface between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) where CCITT 1) Recommendations X.24, X.26, and X.27 are applicable. International Standard ISO/IEC 4903 additionally provides the dimensions of the connector housing, as well as the recommended means of providing a locking device (latching block) and connector shielding. 1) International Telegraph and Telephone Consultative Committee.