Standard ECMA-241 Private integrated services network (PISN) – specification, functional model and information flows – message waiting indication supplementary service (MWISD)

Summary

The Standard specifies the Message Waiting Indication (SS-MWI) supplementary service for Private Integrated Services Networks (PISNs). SS-MWI allows users to receive notifications when messages are waiting and to cancel these notifications. The standard includes stage 1 and stage 2 specifications: stage 1 describes the service from a user’s perspective, while stage 2 outlines the functional entities and information flows involved. SS-MWI can be activated or deactivated by a Message Centre and may include details such as the number of messages or their priority. The service may also allow users to query the status of message waiting indications. There are no specified interactions between SS-MWI and other supplementary services or network features. Conformance requires that stage 3 standards detail signaling protocols and equipment behaviors consistent with the stage 1 and stage 2 specifications.