Construction of telephone systems with the use of both Patterson and fiber optic cables

Supply, installation and maintenance or restoration of PBX systems for public or private networks, systems for telecommunication by telephony, telex, data and video on copper cables, fiber optic cables, data transmission networks and similar, complete with all associated masonry work, the laying of pipes and cables, the installation of junctions, the installation of yard and cabin equipment, and the abutting of cables.