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  Home : ITU-T : Publications : Recommendations : Q Series : Q.957.1 : Q.957.1 (03/93)
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Q.957.1 : Stage 3 description for additional information transfer supplementary services using DSS 1 : User-to-user signalling (UUS)  

Recommendation Q.957.1 (03/93)

Approved in 1993-03-12

Status : Superseded

 

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Updated : 2011.03.14