We are an international provider of integrated security and communication solutions.

Starting in 2000, supplying the rail market, TDM was formed to provide a presence in the UK for the Security Solutions Division of Ascom, the blue-chip Swiss conglomerate.  We are now one of the largest suppliers and systems integrators of communications and security solutions for the UK National Railways.  The first of the London Underground Help Points was designed and supplied by the Ascom team. This design has stood the test of time and is a common sight across the Underground and UK rail network today.

TDM works across multiple industries, providing services and products that include: voice, video and data integration, Help Points, CCTV, CIS, remote access control, public address, alarming, remote monitoring and management, and control centre integration.