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E.420 : Checking the quality of the international telephone service - General considerations

Recommendation E.420 (11/88)

Approved in 1988-11

Status : In force


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English

PDF Document PDF (acrobat)

117249 bytes 1989-01-31 E 14858 
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PDF Document PDF (acrobat)

128882 bytes 1989-01-31 S 14858 
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PDF Document PDF (acrobat)

139464 bytes 1989-01-31 F 14858 

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1655896 bytes 1989-01-31 E 14858  Download Download
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Word Document Word

1668294 bytes 1989-01-31 S 14858  Download Download
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Updated : 2001/09/10