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Q.921 : ISDN user-network interface - Data link layer specification  

Recommendation Q.921

This Recommendation is also included but not published in I series under alias number I.441.
In force components
Number
 Title Status
Q.921 (09/97)
  		ISDN user-network interface - Data link layer specification   In force
Q.921 (1997) Amendment 1 (06/00)
  		  In force
 
 
Superseded and Withdrawn components
Number
 Title Status
Q.921/I.441 (11/88)
  		ISDN user-network interface - Data link layer specification  
This Recommendation is also included but not published in I series under alias number I.441 		Superseded
Q.921 (03/93)
  		ISDN user-network interface - Data link layer specification  
 		Superseded

 

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Updated : 2024-07-26