EN 301 069-1 : 1.3.1
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This standard describes the additions to the ISDN User Part (ISUP) for providing a transport mechanism used by applications requiring a bearer in conjunction with the support of the application's signalling information flow. It specifies the Application Transport Mechanism (APM) for the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators. This transport mechanism shall provide the same capabilities as the Transaction Capabilities.
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