ATIS 1000653.a.1998(S2020)
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ISDN – Call Park Supplementary Service – Generic Procedures for the Control of ISDN supplementary Services, Clarification for Number Identification
This supplement to American National Standard for Telecommunications – Integrated Services Digital Network (ISDN) – Call Park Supplementary Service, ATIS-1000653, revised the standard to improve and clarify the standard based on related advances in other standards bodies. Formerly known as T1.653.a-1998.
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