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London's Blackwall Tunnel gets new communications system 15/4/04
Safety in tunnels has been given a further boost with the news of the development of a new Radio Re-broadcast system that allows both commercial radio and emergency services RF broadcasts to be heard deep within tunnels.

Due for completion in the summer of this year, the new system in London's Blackwall road tunnel supports a number of radio modulations in a highly complex installation that is thought to be the most advanced of its kind in the world. Able to re-transmit broadcasts in AM (MW & LW), FM, DAB (Digital Audio Broadcast), RDS (Radio Data Services) protocols and to support the GSM/PCN (Global System for Mobile Communications/Private Communications Network) , The system ensures that motorists will never be out of range of help or advice. "The system has been designed," said David Giles of Tyco Integrated Systems, "to allow emergency message transmissions to break into normal commercial broadcasts even when the vehicle does not support RDS-TMC. In addition to that, there is a public address facility to warn drivers who have not switched on their radios, of a potential hazard. The local buses can also be contacted when in the tunnel and given instructions and information.

As a further enhancement in a huge refurbishment programme of one of London's major routes below the Thames, the new feeder system also supports the Airwave Project providing the police service with their TETRA (TErrestrial Trunked RAdio) radios. All active equipment is monitored individually and reported as part of the wider SCADA (Supervisory Control And Data Acquisition) management control for the tunnel area.

For further information contact:
Neal Entwistle, Marketing Manager, Tyco Integrated Systems, Bar Hill, Cambridge, England. Tel: #44 1954 784084, E-mail:
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