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T.20 : Standardized test chart for facsimile transmissions  

Recommendation T.20

T.20 and T.21 are superseded by ITU-T T.22, and the test charts 1, 2 and 3 they described are replaced by test charts 4 and 5 of T.22

Superseded and Withdrawn components
Number
Title Status
T.20 (11/88)
 
Standardized test chart for facsimile transmissions  
T.20 and T.21 are superseded by ITU-T T.22, and the test charts 1, 2 and 3 they described are replaced by test charts 4 and 5 of T.22
Withdrawn

 

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Updated : 2011.03.15