The world recommendation for interface requirements between data processing terminal equipment and data communication equipment. CCITT recommendation resembles very closely the American EIA Standard RS232B or C. This standard is considered mandatory in Europe and the other continents.; 國(guó)際電話電報(bào)咨詢委員會(huì)向全世界提出的關(guān)于數(shù)據(jù)處理終端設(shè)備和數(shù)據(jù)通信設(shè)備之間對(duì) 接口要求的建議。該建議非常接近美國(guó)電子工業(yè)協(xié)會(huì)的標(biāo)準(zhǔn)RS232B或RS232C。 這一標(biāo)準(zhǔn)在歐洲和其它一些國(guó)家皆被承認(rèn)。