This standard is one of a series which defines and describes service capabilities within the context of an Integrated Service Digital Network (ISDN). It describes a single service capability which is a telecommunication transport capability. Such capability 5 be made available on a demand or a subscription arrangement. Formerly known as T1.621-1992(R2009).
ATIS 1000621.2014 (R2019)
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Integrated Services Digital Network (ISDN) – User-to-User Signaling Supplementary Service
The Alliance for Telecommunications Industry Solutions , 06/01/2014
Pages: 41
