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  Home : ITU-T : Publications : Recommendations : V Series : V.21 : V.21 (11/88)
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V.21 : 300 bits per second duplex modem standardized for use in the general switched telephone network  

Recommendation V.21 (11/88)

Approved in 1988-11-25

Status : In force


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Format Size Posted Article Number
English

PDF Document PDF (acrobat)

62896 bytes 1989-11-09 E 7179 
Español

PDF Document PDF (acrobat)

70993 bytes 1989-11-09 S 7179 
Français

PDF Document PDF (acrobat)

71854 bytes 1989-11-09 F 7179 

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Format Size Posted Article Number TIES users
English

Word Document Word

44011 bytes 1989-11-09 E 7179  Download
Español

Word Document Word

58730 bytes 1989-11-09 S 7179  Download
Français

Word Document Word

57828 bytes 1989-11-09 F 7179  Download

 

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Updated : 2001/09/10