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  Home : ITU-T : Publications : Recommendations : Q Series : Q.931 : Q.931 (03/93)
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Q.931 : ISDN user-network interface layer 3 specification for basic call control

Recommendation Q.931 (03/93)

Approved in 1993-03

Status : Superseded

This Recommendation is also included but not published in I series under alias number I.451


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English

PDF Document PDF (acrobat)

2382980 bytes 2001-05-30 E 5122 
Espaņol

PDF Document PDF (acrobat)

2518048 bytes 2001-05-30 S 5123 
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PDF Document PDF (acrobat)

2491251 bytes 2001-05-30 F 5121 


 

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Updated : 2006/08/01