ETSI EN 300 485

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ETSI EN 300 485 English PDF Integrated Services Digital Network (ISDN); Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1998), modified]

standard published 10/01/1999 by European Telecommunications Standards Institute

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The specification of the usage of the cause and location fields in the DSS1 signalling protocol as an endoresement of ITU-T Recommendation Q.850 (1997).