- Analyze the systems used in the projects of telephone installations in the surroundings of buildings. - Interpret the regulations in force on telecommunications infrastructure regarding the reception and distribution of telephone signals. - Organize the supply of means and materials for the maintenance of telephone systems and their associated facilities, based on the technical documentation of the installation. - Prepare documentation for the maintenance of different telephone systems, based on technical documentation and current regulations. - Diagnose dysfunctions or breakdowns in the equipment and installations of different telephone systems, locating and identifying them and determining the causes that produce them and applying the required procedures in safe conditions. - Monitor and repair previously diagnosed breakdowns or malfunctions in telephone equipment and installations, using procedures, means and tools in safe conditions and with the required quality. - Carry out the functional, security and start-up tests that must be carried out after the maintenance of the telephone installations, based on the technical documentation and following established protocols. - Analyze the systems used in voice and data network projects in the building environment. - Interpret the regulations in force on voice and data transmission and reception networks in buildings. - Organize the supply of means and materials for the maintenance of voice and data networks, based on the technical documentation of the installation. - Prepare documentation for the maintenance of different voice and data networks, based on technical documentation and current regulations. - Diagnose dysfunctions or breakdowns in the equipment and facilities of different voice and data networks, locating and identifying them and determining the causes that produce them and applying the required procedures in safe conditions. - Monitor and repair previously diagnosed breakdowns or malfunctions in the equipment and facilities of different voice and data networks, using procedures, means and tools in safe conditions and with the required quality. - Carry out the functional, security and start-up tests that must be carried out after the maintenance of the voice and data networks, based on the technical documentation and following established protocols.