scope:

Scope, purpose, and application

This standard describes the signalling system 7 (SS7) based supplementary services for non-integrated services digital network (non-ISDN) subscribers. It provides the user perspective, information flows, and SS7 protocol for the provision of fourteen public, local exchange, and inter-exchange carrier services. These new services are enabled by the additional information transfer capabilities of SS7. They provide enhanced functionality for users with non-ISDN interfaces who access SS7 capable networks.

The non-ISDN user-network interfaces are the analog, or equivalent digital, interfaces specified in, ANSI/EIA/TIA 464-A-1989 and ANSI T1.401-1988.

The ISDN user part, and the SS7 transaction capability application part are the foundations upon which the protocols contained within this standard are built. The ISDN user part is described in ANSI T1.113-1988. The transaction capability application part is described in ANSI T1.114-1988.