Mainframe Communications


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Systems for Terminating, Splicing, Housing and Managing Fibre Optic Cabling

Network House,
Journeymans Way,
SS2 5TF,
United Kingdom
Fax Number

Mainframe Communications has a wide range of fibre-optic-based cabling termination, splicing, housing and management solutions suitable for application in all railway, metro, telecommunications and highway projects.

Mainframe Communications’ product portfolio includes:

  • Equipment frames, racks, cubicles, cabinets and housings
  • Splice trays, pivots, cassettes, frames and tap boxes
  • Cable management trays, assemblies and storage
  • Pig-tails, patch cords, loose-tube and multi-way cables

Fibre-optic splice / distribution products

Mainframe is currently delivering contracts for Thales on the London Underground (LUL) Jubilee and Northern Line Upgrade Programme (JNUP) and Dubai Metro (Red and Green Lines) with scope including provision of:

  • Fibre-optic splice enclosures (FOSE)
  • Fibre-optic distribution frames (FODF)
  • Fibre-optic distribution racks (FODR)
  • PLC racks
  • Communication racks
  • Patch cords / break-out cables

The PLC and communication racks, containing free-wired relay circuitry, interface local monitoring / alarm systems and operator workstations (via the fibre-optic network) with the Thales SELTRAC communications-based train control (CBTC) system being provided for JNUP.

Mainframe's trained technicians use the latest technology.
Mainframe's manufacturing facility can pre-wire racks, cubicles or equipment rooms.
Mainframe provides splice enclosures, distribution racks / frames and tap boxes.
Mainframe offers pig tails, patch cords, loose tube or multi-way cables.

Tap boxes, splice enclosures, cords and cables for underground railways and metro systems

Mainframe also supplied a variety of fibre-optic products (tap boxes, splice enclosures, cords and cables) into the Transforming the Tube / CBS Outdoor Alive project to support work providing digital escalator panels (DEP) and cross track projection (XTP) screens across a number of London Underground stations and lines.

Mainframe’s housings are IP68-rated, LUL-compliant (therefore particularly appropriate for underground environments), suitable for trackside installation and capable of accommodating other (non-fibre related) equipment – offering potential to reduce project-implementation costs.

Pre-wire / rack assembly capability

In addition to a wide range of products, comprising in excess of 2,000 standard items, Mainframe has a full pre-wire / rack assembly capability, which is not restricted to fibre-optic solutions. The company prides itself on its in-house capability to develop and design solutions specific to its customers’ particular applications.

In-house testing of fibre-optic connections

In order to maintain the highest possible quality and to minimise insertion losses all fibre-optic connections are tested in-house by Mainframe technicians using the latest digital automated interferometry techniques.

The Mainframe Communications offering includes a dedicated UK headquarters factory and manufacturing facility, less than 40 miles from central London, and 15 years’ experience supplying the rail / metro markets.

About Mainframe Communications

Mainframe has 20 years’ experience supplying the telecomms, data transmission, petro-chemical, highway and aerospace industries, and has a range of current supply contracts with leading companies, including telecomms giants Verizon, AboveNets and Colt.

Whether your project’s requirement is patch cords or fully populated pre-wired equipment rooms, the solution can be found in Southend-on-Sea, where Mainframe Communications is making the fibre-optic connection.


  • Metropolitan Line Extension, London

    The Metropolitan Line Extension (previously known as Croxley Rail Link (CRL)) will connect the Watford branch of the London Underground Metropolitan line with the National Rail network at Watford Junction via Watford High Street, UK.

  • Wuhan Metro

    The first metro line in Wuhan, the capital of the Hubei province of China, became operational in September 2004.

Mainframe Communications Ltd
Network House
Journeymans Way
United Kingdom

Fax Number