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ETSI ETS 300 185-1

Integrated Services Digital Network (ISDN); Conference call, add-on (CONF) supplementary service; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
standard by European Telecommunications Standards Institute, 04/01/1993
Publisher: ETSI

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Layer 3 ISDN D-channel signalling procedures for control of the conference Call, Add on supplementary service

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