International Telecommunication Union   ITU
Français  Español
 
Site map Contact us Print version
  Home : ITU-T : Publications : Recommendations : Q Series : Q.521
Recently posted -  Search Recommendations
   
Q.521 : Digital exchange functions  

Recommendation Q.521

In force components
Number
 Title Status
Q.521 (03/93)
  		Digital exchange functions   In force
 
 
Superseded and Withdrawn components
Number
 Title Status
Q.521 (11/88)
  		Exchange functions  
Replaces Q.503 (1984) and Q.513 (1984) 		Superseded

 

Top -  Feedback -  Contact us -  Copyright © ITU 2008 All Rights Reserved
Contact for this page :  ITU-T Publications
Updated : 2008/04/24