Our telecommunications network integrates the set of services required for the operation of the Metro and bus services. This network has the most advanced systems to guarantee the services on which it depends and which can be adapted to meet future needs. Its main objective is to support the teleprocessing, voice and remote-control activities.

This network is made up of 120 interconnected nodes (between Metro stations and other offices) stemming from a fibre-optic installation that makes it possible to exchange a high volume of information.

The access network provides comprehensive services to our entire telecommunications system (telephony, remote control, information, etc.) and providing services to other sub-networks (teleprocessing, corporate telephony and radiotelephony, etc.). Furthermore, each Metro station is equipped with a local network that services the different types of equipment installed at the station.

The new equipment is based on a fibre-optic network that covers 81 kilometres of the Metro network underground.

Sub-networks

The transport sub-network is networked in a triangle formed of the three TMB corporate centres at the Sagrada Família, Santa Eulàlia and Sagrera stations and is based on digital technology that is synchronised at 155 Mbps. Each vertex is connected with the other linked buildings at 8Mbps thanks to a fault-tolerant router. The telephony system includes traffic switchboards linked at 4Mbps. This ring-shaped connection guarantees communication between the three in the event of any link being down.

The access sub-network is based on a digital and plesiochronous hierarchy at 8Mbps that provides coverage to the telephony, teleprocessing, underground radio and remote-control signals. It is a woven network made up of eight semi-lines, adapted to the physical environment of the Metro's operation.

Our telecommunications network includes all the services associated with operating the metro and buses, as well as other elements aimed at providing a better service to the public.

- Those that send out, receive and process signals.