Historical
ANSI T1.632-1993 (R1999)
ISDN Supplementary Service Normal Call Transfer
This standard is one of a series which defines and describes supplementary services within the context of an Integrated Services Digital Network (ISDN). The interaction of this service with other ISDN services is also included. The purpose of the standard is to allow maximum compatibility among network and user-owned telecommunication equipment in order to increase the attractiveness and usefulness of ISDN-based capabilities. This standard describes the ISDN Normal Call Transfer Service in terms of service definition and protocol and procedures needed for implementation.
Alliance For Telecommunications Industry Solutions [atis]