Integrated Services Digital Network (ISDN); Completion of Calls to Busy Subscriber (CCBS) supplementary service - Service description; English version ETS 300357:1995
Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) supplementary service - Service description (Endorsement of the English version EN 300357 V 1.2.1 (2001-05) as German standard)— 1 стр.
Telecommunications Management Network (TMN) - Functional specification of Customer Administration (CA) on the Operations System/Network Element (OS/NE) interface - Part 1: Single line configurations
Integrated Services Digital Network (ISDN) - Completion of Calls to Busy Subscriber (CCBS) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification
