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  Home : ITU-T : Publications : Recommendations : Q Series : Q.31 : Q.31 (11/88)
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Q.31 : Noise in a national 4-wire automatic exchange

Recommendation Q.31 (11/88)

Approved in 1988-11

Status : In force


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PDF Document PDF (acrobat)

46910 bytes 1990-05-29 E 15228 
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PDF Document PDF (acrobat)

52387 bytes 1990-05-29 S 15228 
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PDF Document PDF (acrobat)

52562 bytes 1990-05-29 F 15228 

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Word Document Word

31013 bytes 1990-05-29 E 15228  Download Download
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Word Document Word

41012 bytes 1990-05-29 S 15228  Download Download
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Word Document Word

39663 bytes 1990-05-29 F 15228  Download Download

 

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Updated : 2001/09/10