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Q.400-Q.490 : Specifications of Signalling System R2

Recommendation Q.400-Q.490

In force components
Number
Title Status
Q.400-Q.490 (11/88)
 
Specifications of Signalling System R2  
Initially published in Blue Book Fascicle VI.4 (1988). Available now in electronic format only
In force

 

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Updated : 2006/08/01