从CENELEC、EN和IEC出版物中选择CCITT接口的连接器，这些出版物可供使用或正在准备中。ETR将重点关注:-连接器系列（如SUB-D）-系列内变型（如公/母）-锁紧系统（如滑动锁、螺钉）

To select connectors for CCITT interfaces from CENELEC, EN and IEC publications which are available or in preparation. The ETR will focus on : - Family of connectors (eg SUB-D) - Variant within family (eg male/female) - Latching system (eg slide lock, screw)