It is common practice for management information to be exchanged between space mission management and a space link service provider for the purposes of negotiating, configuring, and executing the Tracking, Telemetry, and Command (TT&C) functions and cross support transfer services that are provided to the space mission. The various processes that generate, exchange, ingest, and act upon this management information are collectively referred to as service management. This International Standard defines a set of Space Communication Cross Support Service Management (SCCS-SM) services by which space link service providers and space missions exchange information needed to arrange spacecraft contact periods and establish the operating parameters of the space link services and cross support transfer services during those contact periods. The SCCS-SM services reflect the common practices of the space operations community and the contents of the SLE transfer specifications. Four SCCS Management Services are defined: a) Service Agreement service, which addresses the information that needs to be agreed before a cross support service can be established; b) Configuration Profile service, which addresses the establishment of sets of data concerning the space link and ground station configuration; c) Trajectory Prediction service, which addresses the transfer and updating of spacecraft trajectory data; d) Service Package service, which addresses the arrangement of spacecraft space link session times and execution of the transfer services. This International Standard deals with only three of the SLE transfer services defined in the Cross Support Reference Model: a) Forward Communications Link Transmission Unit (FCLTU); b) Return All Frames (RAF); c) Return Channel Frames (RCF). The management of other SLE transfer services, including Return Operations Control Field (ROCF), Forward Space Packet (FSP), supported by the Communications Operation Procedure-1, and a radiometric data transfer service, will be addressed in future versions of this International Standard. This International Standard addresses the management of both online and offline return SLE transfer services. In this International Standard, online return services are part of a larger class of services referred to as Space Link Session Transfer Services (because they are concurrent with an active space link), and offline services are part of a larger class of services referred to as Retrieval Transfer Services (because they are the mechanism by which data are retrieved from intermediate storage). This International Standard addresses the management of user-initiated transfer services only. Although some of the SLE transfer service specifications permit provider initiation, all implementations of SLE transfer services are user-initiated as of the time of the writing of this International Standard. Therefore, under this version of SCCS-SM, the initiator is always the user, and the responder is always the provider. This International Standard provides a mechanism for defining and scheduling non-CCSDS transfer services that are bilaterally defined between the Complex and MDOS. RF and ModuLAtion Systems and Space Link Services Addressed in this Recommended Standard This International Standard supports the exchange of information used in scheduling of services that employ radio frequency (RF) and modulation systems that are conformant with the CCSDS Recommended Standard 401.0, Radio Frequency and Modulation Systems—Part 1: Earth Stations and Spacecraft. Space link service providers that provide RF links that conform to CCSDS 401.0 can implement the full set of capabilities specified herein. However, the capabilities provided by this International Standard for space communication service scheduling information exchange are not strictly limited to those recommended in CCSDS 401: for example, this International Standard supports the use of additional forward subcarrier frequencies beyond those specified in CCSDS 401. Space link service providers that provide RF links that do not conform to CCSDS 401.0 or the extended parameters and values supported by this International Standard may use bilaterally defined space link service information, or may simply implement a subset of the capabilities specified herein. This version of the International Standard contains the following limitations, constraints, exclusions and qualifications: a) The concept of staging in the Cross Support Reference Model—distributing the provision of transfer services across two or more Complexes that progressively process and transform a data stream—is not addressed in this document. b) This International Standard does not address the mechanism for exchanging authentication and access control information associated with the creation of transfer service credentials. c) Ground systems and services that are not directly concerned with the transport of transfer frames and communications link transmission units compliant to CCSDS Recommended Standards are not described. Processing of data held within the data fields of source packet Protocol Data Units (PDUs) is outside the scope of this document. d) The initial establishment of a service relationship and the negotiation of a mission-length Service Agreement are not covered by this International Standard. e) This International Standard does not define the operations and messages required to perform execution-time monitoring and control of transfer services. f) The specification of systems to generate information required by SCCS-SM, such as mission planning (scheduling), flight dynamics (trajectory), mission monitoring and control, and ground station selection are outside the scope of this document. It is assumed that these systems will provide the data needed in the required format at the required times. g) SCCS-SM does not define the way in which Complex Management (CM) interfaces with the equipment that is used to provide the space link and transfer services, so the users in the MDOS do not need to be concerned about the internal workings of the Complex. In other words, Complex Management provides an interface to the user that hides the complexity of the provider’s Complex. The scope and field of application are furthermore detailed in subclause 1.4 of the enclosed CCSDS publication.