This standard is one of a series of standards describing the model, protocol profile, and the communications capabilities in support of management and maintenance functions to be provided at the ISDN user-network interface. This standard describes the protocol profile employed in providing management information transfer capabilities at the ISDN user-network interface. The protocol profile is based on American National Standards for layers 1-3 and on International Standards and CCITT Recommendations for the application layer. To allow the application layer to access the network layer interface, a convergence function that provides the mapping service has been defined. The application layer provides transaction type management capability via three application service elements: ACSE, ROSE, and CMISE.