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Q.921�:�ISDN user-network interface - Data link layer specification �

Recommendation Q.921

This Recommendation is also included but not published in I series under alias number I.441.
In force components
Number
 Title Status
Q.921 (09/97)
� 		ISDN user-network interface - Data link layer specification � In force
Q.921 (1997) Amendment 1 (06/00)
� 		� In force
�
�
Superseded and Withdrawn components
Number
 Title Status
Q.921/I.441 (11/88)
� 		ISDN user-network interface - Data link layer specification �
This Recommendation is also included but not published in I series under alias number I.441 		Superseded
Q.921 (03/93)
� 		ISDN user-network interface - Data link layer specification �
 		Superseded

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