Scenarios are developed during the analysis phase of system development to assist in understanding business events, objects and interactions. Scenarios document specific transaction sequences, transformations, interfaces and information exchange. They represent cases that should be included in the Software Quality Assurance Test Plan, and may be used for end user training after the system is completed. Use case scenarios facilitate communication between the people who request a system, analysts, developers and testers. They are used to validate understanding, and to identify normal and special use situations.
Scenarios clarify an evolving agreement between requesters and development teams.
SCPs connect to Signalling Points, which connect to Switches . Service Creation Environment - SCE GUI software for entering complex enhanced service specifications. Serving Wire Phone number - POTS number. A single 193rd bit is used for link control and error checking. However, because ESF is not backward compatible and there continues to be a large installed base of channel banks and DS-1 Multiplexers that are based upon D4, it is still the default private line formatting technique.