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� Home : ITU-T : Publications : Recommendations : E�Series : E.421 : E.421 (11/88)
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E.421�:�Service quality observations on a statistical basis �

Recommendation E.421 (11/88)

Approved in 1988-11-25

Status : In force

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PDF Document PDF (acrobat)

64846 bytes 1989-01-31 E�14859�
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PDF Document PDF (acrobat)

71853 bytes 1989-01-31 S�14859�
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PDF Document PDF (acrobat)

79148 bytes 1989-01-31 F�14859�

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Format Size Posted Article Number TIES users
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Word Document Word

46249 bytes 1989-01-31 E�14859� Download
Espa�ol

Word Document Word

56939 bytes 1989-01-31 S�14859� Download
Fran�ais

Word Document Word

58148 bytes 1989-01-31 F�14859� Download

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