Technical support to ATI in contacts with ANATEL to ensure the correct information requested by the agency to formalize the authorization for the operation of the terrestrial part of a submarine cable link system under implementation. The work encompassed the study, preparation, and submission to Anatel of a detailed description of the optical system under consideration (architecture, equipment, and interfaces), as well as working towards the certification/homologation of the terrestrial fiber optic cables that are part of the system, acting to resolve any non-conformities identified by the agency.