Fibre count within cables has increased and high core count ribbon cables containing 432 fibres are now being installed on rail routes. Bending Fibre cables, being much smaller than copper equivalents, can be rolled onto a drum in much greater lengths, and require. Yet today's connectivity technology - and the results of field experiences - have proven that fiber optic is, and will remain, an entirely appropriate technology for the rail industry in the future. These radio systems connect trains with the traffic control systems in the railway's own data centers via. Individual optical fibres in the cable carry short wavelength light pulses and are used in conjunction with digital transmission systems to transmit and receive data. There have been huge developments in fibre technology over the years, particularly over the last 10 years or so with the. Fiber optic cables will be laid along the railway lines and new antenna sites installed for future railway radio systems for the real-time transmission of large volumes of data. We will continue to expand our fibre optic network. Fast, easy and personal - DB. Within these complex networks, fibre-optic connectivity guarantees maximum transmission rates.