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  Home : ITU-T : Publications : Recommendations : Q Series : Q.400SerSup1 : Q.400SerSup1 (11/88)
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Q.400SerSup1 : Line signalling for Dc lines with System R2 interregister signalling  

Recommendation Q.400SerSup1 (11/88)

Approved in 1988-11-25

Status : Superseded

 

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Updated : 2011.05.27