Between 1982 and 1986 the CCSDS developed a series of technical Recommendations for the standardization of conventional missions  . These Recommendations form a basis for unmanned science and applications spacecraft communications. The Recommendations cover modulation, packet telemetry, telemetry channel coding, and telecommand formats. CCSDS Advanced Orbiting Systems (AOS) standards have emerged in order to meet future needs. The CCSDS AOS meets the needs of future manned missions.
The CCSDS AOS communications format standardizes communications and promotes interoperability. The CCSDS AOS standard integrates video, audio, telemetry, and scientific communications. Advantages of adopting the CCSDS AOS standard are that it: 1) integrates data, voice, and video transmission, 2) facilitates interoperability, and 3) provides flexibility in the allocation of communication bandwidth .