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ISDN:Specification: Revision history

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23 September 2014

7 October 2013

29 February 2012

4 August 2010

  • curprev 11:5311:53, 4 August 2010Cboulanger talk contribs 468 bytes +468 Created page with 'The ISDN protocol layer conforms to the following standards: *ITU-T Q.920 *ITU-T Q.921 *ITU-T Q.931 *ETS 300 102 *ETS 300 125 *ETS 300 403-1, 403-2, 403-3 *AT&T TR 41459 *TS-013…'