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I.431 : Primary rate user-network interface - Layer 1 specification  

Recommendation I.431

In force components
Number
 Title Status
I.431 (03/93)
  		Primary rate user-network interface - Layer 1 specification   In force
I.431 (1993) Amendment 1 (06/97)
  		  In force
 
 
Superseded and Withdrawn components
Number
 Title Status
I.431 (11/88)
  		Primary rate user-network interface - Layer 1 specification   Superseded

 

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Updated : 2010/08/23