Technical Areas


Railway transport, due to its multiple activities and its operational and management complexity, requires a great volume of information interchange. If we factor in the dispersal of the different work centers, it is necessary to have differentiated telecommunication systems available for management, data and use, which includes traffic control, remote controls, signaling, public address systems… these services, with their different systems of management and control, are integrated into an exclusive telecommunications network.

An important action was the installation of a Train-Land communication system in all of the command posts, which manage 89 bandwidths of railway traffic. The system permits radio communication between the command post and the engineers of the trains circulating within a bandwidth, which presently have a 9,401 km. range.

We currently maintain a 15,750 km. fiber optics network, one of the largest in the country. We have highly qualified teams whose operative bases are strategically located throughout the territory, serving the principal telephone companies in the country.

On this fiber optics network a digital network of integrated services is being developed to respond to all of ADIF’s telecommunications needs, and dynamic digital equipment has been installed for use, fundamentally, in exploitation-related services. The equipment commutes 64 Kbits/s and 2 Mbits/s transmission channels, permitting the establishment of automatic alternative routes in case of network failure and bringing an increase in reliability.

At the same time, high-capacity digital networks are being deployed that will satisfy voice requirements as well as data and images, for the different services needed. Moreover, ring structured systems are being developed that will support multiservice IP networks. All of this has as a goal the deployment of one single network that can give high-quality services to all of the different needs. Equally, digital telephone exchanges that serve over 18,000 lines are being replaced to allow new functions for the ADIF voice network.

  • Digital commutation centers: 174
  • Data lines: 3,844
  • GSMR Network: 1,510 km.