英语词汇“x.21”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	x.21
释义	X.21 X.21 (communications, standard)A digital signaling interfacerecommended by ITU-T that includes specifications forDTE/DCE physical interface elements, alignment of call control characters and error checking, elements of the callcontrol phase for circuit switched services, data transferat up to 2 Mbps, and test loops. 64 kbps is the mostcommonly used transfer rate. X.21 An ITU standard protocol for a circuit switching network.
随便看	illnesses illness experience illness, injuries, fatalities illness management and recovery illness management questionnaire illness, medications, stress, alcohol, fatigue, eating illness, medication, stress, alchohol, fatigue, emotion illness of yasser arafat illness prevention illness prevention program illnesss illness self concept repertory grid i'll never do it again i'll never tell ill-nourished ill-nurtured illocality illocution illocutionary illocutionary act illocutionary force indicating device illocutions illogic illogical illogicalities

英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。

X.21