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Q.542�:�Digital exchange design objectives - Operations and maintenance �

Recommendation Q.542

In force components
Number
 Title Status
Q.542 (03/93)
� 		Digital exchange design objectives - Operations and maintenance � In force
�
�
Superseded and Withdrawn components
Number
 Title Status
Q.542 (11/88)
� 		Digital exchange design objectives - Operations and maintenance �
Replaces Q.506 (1984) and Q.516 (1984) 		Superseded

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