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E.550 : Grade-of-service and new performance criteria under failure conditions in international telephone exchanges

Recommendation E.550

In force components
Number
 Title Status
E.550 (03/93)
  		Grade-of-service and new performance criteria under failure conditions in international telephone exchanges   In force
 
 
Superseded and Withdrawn components
Number
 Title Status
E.550 (11/88)
  		Grade-of-service and new performance criteria under failure conditions in international telephone exchanges   Superseded

 

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Updated : 2008/02/12