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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�
Espa�ol

PDF Document PDF (acrobat)

55433 bytes 1989-10-17 S�11150�
Fran�ais

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
Espa�ol

Word Document Word

44500 bytes 1989-10-17 S�11150� Download
Fran�ais

Word Document Word

44345 bytes 1989-10-17 F�11150� Download

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