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H.21 : Composition and terminology of international voice-frequency telegraph systems

Recommendation H.21

Deleted after its content became technically out of date

Superseded and Withdrawn components
Number
Title Status
H.21 (10/84)
 
Composition and terminology of international voice-frequency telegraph systems  
Deleted on 1998-06-18 after its content became technically out of date
Withdrawn

 

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Updated : 2011.03.15