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ETSI ETS 300 122-1

Integrated Services Digital Network (ISDN); Generic keypad protocol for the support of supplementary services; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 1: Protocol specification
standard by European Telecommunications Standards Institute, 03/01/1992
Publisher: ETSI

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ISDN User-Network Layer 3 Signalling Protocols for Supplementary Services & associated Test Specs

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Integrated Services Digital Network (ISDN); Call Waiting (CW) supplementary service; Digital Subscri..

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