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  Home : ITU-T : Publications : Recommendations : Q Series : Q.721 : Q.721 (11/88)
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Q.721 : Functional description of the Signalling System No. 7 Telephone User Part (TUP)

Recommendation Q.721 (11/88)

Approved in 1988-11-25

Status : In force


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Format Size Posted Article Number
English

PDF Document PDF (acrobat)

49834 bytes 1989-10-17 E 11150 
Español

PDF Document PDF (acrobat)

55433 bytes 1989-10-17 S 11150 
Français

PDF Document PDF (acrobat)

56315 bytes 1989-10-17 F 11150 

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TIES users

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Format Size Posted Article Number TIES users
English

Word Document Word

33321 bytes 1989-10-17 E 11150  Download
Español

Word Document Word

44500 bytes 1989-10-17 S 11150  Download
Français

Word Document Word

44345 bytes 1989-10-17 F 11150  Download

 

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Updated : 2014-05-15