IEC 60050-722 Ed. 1.0現行
International Electrotechnical Vocabulary - Chapter 722: Telephony
出版：International Electrotechnical Committee
專家解讀視頻
It has the status of a horizontal standard in accordance with IEC Guide 108<
BS 4727-3 Group 02:1971 - Equivalent
IEV KAPITEL 722 - Identical
NEN 10050-722:1995 - Identical
BS 4727-3:GRP02:1993 - Equivalent
NFC 01 722:1994 - Identical
PN IEC 60050-722:2000 - Identical
UNE 21302-722:1992 - Identical
