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  Home : ITU-T : Publications : Recommendations : Q Series : Q.553 : Q.553 (11/88)
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Q.553 : Transmission characteristics at 4-wire analogue interfaces of a digital exchange  

Recommendation Q.553 (11/88)

Approved in 1988-11-25

Status : Superseded

 

Table of Contents

Replaces Q.507 (1984) and Q.517 (1984)

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Updated : 2008/04/24