scope:

Scope and purpose

This standard specifies the service capabilities of Message Waiting Indicator Control and Notification (MWICN) services within the context of an Integrated Services Digital Network (ISDN). Message Waiting Indicator Control and Notification service allows a Message Storage and Retrieval (MSR) System to inform its client users about the status of messages recorded at the MSR System. The associated switching and signaling specifications are also provided. This service may be made available by subscription arrangements. The interaction of this service with other ANSI defined service capabilities are included. The purpose of this standard is to allow maximum compatibility among network and user owned telecommunications equipment in order to increase the attractiveness and usefulness of ISDN based capabilities.

Application

This standard applies to ISDN Basic Accesses and Primary Rate Interfaces and is intended to supplement the Basic Circuit Mode call procedures described in T1.607 and T1.113. It shall be used in conjunction with the other ANSI standards for ISDN supplementary services for a complete understanding of the interactions between this and other services. This supplementary service is not dependent on any particular bearer capability.