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X.21bis�:�Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous V-Series modems �

Recommendation X.21bis

In force components
Number
 Title Status
X.21bis (11/88)
� 		Use on public data networks of Data Terminal Equipment (DTE) which is designed for interfacing to synchronous V-Series modems � In force

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