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  Home : ITU-T : Publications : Recommendations : O Series : O.81 : O.81 (11/88)
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O.81 : Group-delay measuring equipment for telephone-type circuits

Recommendation O.81 (11/88)

Approved in 1988-11

Status : In force


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PDF Document PDF (acrobat)

113859 bytes 1990-07-10 E 10293 
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PDF Document PDF (acrobat)

125681 bytes 1990-07-10 S 10295 
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PDF Document PDF (acrobat)

134641 bytes 1990-07-10 F 10294 

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Updated : 2001/09/10