Information technology — Telecommunications and information exchange between systems — Start-stop transmission signal quality at DTE/DCE interfaces
信息技术——系统间的电信和信息交换——DTE/DCE接口处的启停传输信号质量
Specifies signal quality requirements for serial data transmission. The interface of concern conforms to CCITT Recommendations V.24 (telephone networks) and X.24 (data networks). Annex A is for information only.