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R.57 : Standard limits of transmission quality for planning code-independent international point-to-point telegraph communications and switched networks using 50-baud start-stop equipment

Recommendation R.57 (11/88)

Approved in 1988-11

Status : In force


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PDF Document PDF (acrobat)

52551 bytes 1990-04-19 E 15295 
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PDF Document PDF (acrobat)

58613 bytes 1990-04-19 S 15295 
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PDF Document PDF (acrobat)

59329 bytes 1990-04-19 F 15295 

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37045 bytes 1990-04-19 E 15295  Download Download
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Word Document Word

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Updated : 2001/09/10