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Q.400SerSup2�:�Both-way working of the analogue line signalling version of Signalling System R2 �

Recommendation Q.400SerSup2

Superseded and Withdrawn components
Number
 Title Status
Q.400SerSup2 (11/88)
� 		Both-way working of the analogue line signalling version of Signalling System R2 � Superseded

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