London Underground | Alker Fibre Optic Specialists

London Underground

Alker is also able to provide bespoke inspection and cleaning tips for your equipment and your assets.

About The Company

London Underground is part of government-owned Transport for London overseeing the city’s transportation infrastructure. One of the worlds largest subway systems carrying more the 1 billion passengers per year.


To repair broken legacy fibre optic connectors after carriages have been parted.


Onsite assessment of internal and external fibre optics in each of the carriages;

Reverse engineered and manufactured all obsolescent fibre optic connector parts;

Designed all repair procedures to onsite regulations, including termination kit.

Over several months Alker has performed onsite visits to conduct emergency repairs of the fibre optic connectors within the train carriages. Alker has also refurbished the fibre optic link leads which connect two carriages.


  • Dramatic reduction of the need for new leads, saving both costs and delivery times.
  • Reduced stock, Alker could hold replacement refurbished leads in-house for next day delivery.
  • The near elimination of fibre optic loom replacement saving labour and cost of the loom.
  • Improved reliability for each carriage, and in turn, each complete train.
  • Increased transmission performance for each of the trains in service.
  • The Lifetime of the equipment will be extended as per the upgrade requirements

Connecting the future world…..

At Alker we have more than 35 years’ experience in the fibre optic industry, our engineers are able to break down existing connectors to determine the most appropriate course of action to carry out a repair, redesign or have new parts manufactured to extend the life of your system.

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