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O.81 : Group-delay measuring equipment for telephone-type circuits  

Recommendation O.81

In force components
Number
 Title Status
O.81 (11/88)
  		Group-delay measuring equipment for telephone-type circuits   In force
O.81 Appendix I Erratum1 (06/00)
  		  In force
O.81 Appendix I (06/98)
  		A measuring signal (multitone test signal) for fast measurement of amplitude and phase for telephone type circuits  
Formerly published as Supplement 3.7 in the Blue Book (1988), Fascicle IV.4, and then renumbered on 26 June 1998 as Appendix I to ITU-T O.81 without further modification 		In force

 

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Updated : 2023-03-17