Which organization approved the first version of DOCSIS as an international standard?

The first version of DOCSIS (Data Over Cable Service Interface Specification) was approved as an international standard by the International Telecommunications Union (ITU). This organization plays a crucial role in coordinating the global telecommunications standardization process, ensuring compatibility and interoperability of technology across different countries. The ITU's endorsement of DOCSIS provided a solid foundation for cable modem technology, enabling a standard approach to delivering high-speed internet over existing cable television infrastructure.

The other organizations listed, while instrumental in their respective domains, do not focus specifically on the creation of international standards for broadband technologies in the way the ITU does. The IEEE is primarily known for standards related to networking and electrical engineering but did not oversee DOCSIS. The FCC is a regulatory body in the United States, and while it has a significant role in telecommunications policy, it does not set international standards. The TIA works on standards for various telecommunications equipment but is not the body that approved DOCSIS as an international standard. Thus, the ITU's involvement in the standardization of DOCSIS highlights its critical role in fostering international compatibility and technological advancement in broadband communications.