Technical Support


(24 hours a day, 7 days a week)



810 on the electricity grid and 534 on the railway network

More than


Kilometres of fibre fully interconnected


Our customers can choose among different types of sites, according to the technical requirements, to the location and to the type of optical fibre used to interconnect the sites. We offer telecommunications co-location centres distributed strategically along the backbone network and telecommunications shelters that are located throughout the electricity grid.

Electrical sites

At Reintel, when we speak of electricity grid sites, we are referring to telecommunications shelters. These installations are permanent, prefab and modular structures located near the electricity substations or near the high-voltage towers mainly targeted to perform signal regeneration functions.
Our electricity grid sites have the following features:

  • Size and access:
    The size of these sites is varying and scalable. All the telecommunications shelters have safety perimeter fencing and our customers can access to the cabin, either through a common entrance door or through an independent door with electronic key for each operator.
  • Air-conditioning system:
    The electricity grid sites are equipped with a redundant air-conditioning system - two independent, high-performance industrial systems, in 1+1 standby mode.
  • Power supply:
    Our customers can benefit from our double power supply with a redundant rectifier and battery configuration and a connection to a diesel generator unit if the local utility supplier cannot supply them with a redundant power supply connection.
  • Permanent monitoring:
    We assure access control, monitoring and image display of the site by means of an indoor camera and an audio connection to our centre, with 24-hour monitoring. We monitor and manage any type of alarm we may receive.
Railway sites

Railway sites are also known as telecommunications co-location centres. These sites are permanent, prefab, hut type structures, or technical services areas divided by modular partition walls. The telecommunications co-location centres are located on the railway network land, close to the railway tracks or, in some cases, inside a building.

  • Size and access:
    The basic size of each site in the telecommunications co-location centres is of 3.6 square metres. But similarly to the electricity grid sites, we provide the possibility to increase their size by moving the partition walls inside the site. We deliver the modules as an open-plan area with an independent access door and key for each operator and furnished with the ducting installation that connects to the main module of the site.
  • Air-conditioning system:
    Operators can install their own air-conditioning system.
  • Power supply:
    A minimum of 4.4 kW power supply connection is delivered from an external electric switchboard, supply that is invoiced to our customer according to demand. We are aware that each customer has its own needs. For that reason, our sites can bear the installation of their own electric switchboard and auxiliary supply and backup systems, within the leased area.
  • Monitoring:
    From our Network Operations Centre (NOC) we can monitor the status of the electricity supply as well as supervise the fibres of the backbone links in the main module. Some telecommunications co-location centres have controlled access onsite and require the presence of our maintenance staff when visiting the site.

A network of more than 52,200 km throughout Spain


Red Eléctrica Infraestructuras de Telecomunicación (Reintel) is the subsidiary of the Redeia that, as of 1 July 2015, has been responsible for the management of the Company’s telecommunication business, an activity that previously, from 2008, had been carried out by Red Eléctrica Internacional. Reintel focuses on the commercial exploitation of dark fibre infrastructure and technical facilities connected to such infrastructure relying on an optical fibre network of more than 52,200 km. Therefore, we have the full support of a solid and solvent business group with a vast experience in the telco market since 1997.

At Reintel we are aware of how important for our customers is to have detailed information about our infrastructure and, therefore, in the Infrastructure section on this web we present both the technical features of the sites and the details of the network map displayed by province.

We invite you to discover, in the Infrastructure section on the web, detailed information about our dark fibre network (currently more than 52,200 km) and the 1,344 sites (810 on the electricity grid and 534 on the railway network) that we make available to you.

At Reintel we manage two networks, each one with its own history and unique technical features: the unused, surplus fibre network of Red Eléctrica and, since November 20, 2014, the surplus marketable fibre network of ADIF.

These are two networks that are deployed through different infrastructures, each with different requirements and constraints, but which are being interconnected by Reintel at many points in order to offer services to our customers as if we were dealing with a single network by using the best of both. At Reintel we are working to provide our customers with a single network framework in which other networks integrate and interconnect every day.

Yes. Reintel, in addition to offering its optical dark fibre network, also offers two types of sites (on the electricity grid and on the railway network) to provide customised solutions based on the technical requirements, location and type of optical fibre that interconnects them. Contact us and we will analyse your specific needs in order to offer you the best solution.