The Exchange Message Interface (EMI) document is a message exchange guideline for the telecommunications industry. It is used as a standard method of interface between companies providing various services in the industry. The EMI is used to support customer billing and various customer and company support functions needed by the industry (e.g. account summary and tracking analysis).
Unified Ordering Model (UOM) Volume I, II, III, IV - Business Requirements Wireless Intercarrier Communications Interface Specifications (WICIS) for Number Portability
