The Solution

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  A solution that succeeds

  In addition to building the 1,387 m long railroad tunnel under the Bosporus, the existing railroad network, which runs from Halkalı in Europe up to Gebze in Asia, was replaced and expanded in the framework of the Marmaray project. For a smooth and trouble-free railroad operation as well as the safety of the railroad passengers and the train personnel, our TETRA mobile radio system offers the radio subscribers of the Turkish National Railroad (TCDD) the optimum work equipment.
  Our TETRA mobile radio system supports the classic personal mobile radio as well as the disposition mobile radio, i.e. the communication between trains and control centers. Additional features of our system are the automatic login and logout of the individual trains to and from the system, the passenger emergency call from the train as well as the automatic transmission of diagnostic messages of the trains to the central control.
  Our TETRA mobile radio system masters the special requirements imposed by the boundary conditions of the project without any problems. Roughly one-third of the entire railroad line is supplied with mobile radio underground without any restrictions. Comprehensive reliability, high flexibility as well as a minimum bandwidth demand also distinguishes our solution.

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  Our solution in detail

  For the mobile radio system in the Marmaray project, we implemented an individually tailored ACCESSNET-T IP network. For a continuous mobile radio supply, we installed two base stations inside the railroad tunnels, 27 base stations above ground as well as eleven indoor base stations for supplying the railroad stations. Due to varied redundancy functions, the TETRA mobile radio system is perfectly secured against breakdowns. Even under extreme conditions, such as the breakdown of entire locations, the entire mobile radio system continues to remain reachable and the performance is maintained.

  The individual trains are directly connected with the mobile radio system using onboard units (OBRUs). A total of 110 of these OBRUs from ErvoCom are used for voice communication and transmit all types of different pieces of information in the Marmaray project via our TETRA mobile radio system. Extensive applications offer varied and user-friendly functions. The integrated network management enables a central and convenient network monitoring as well as fast fault diagnostics and remedy from the workplace. The "Radio Ground Server" application enables an upload of diagnostic messages to the maintenance management system using SDS messages. An external train dispatcher system with integrated voice recorder from Thales Deutschland ("Norumat") is used by our TETRA mobile radio system for effective data transmission. Own and external applications are efficiently integrated via our multifunctional ACAPI interface.

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  The BWC solution was needed to capture video evidence, so the footage could be used to review incidents. BOC also wanted to deploy BWCs at ports throughout the Philippine archipelago to enhance its monitoring activities.