Services we offer We offer a Varity of specialist services including PCB Design Software Design Firmware Design Analogue circuit design Digital circuit design RF system design Maintenance of communications systems. PCB Design Using the latest software we can design a PCB to the most precise specifications to meet any need you might have.     Software / Firmware Design Custom software and firmware can be developed for windows front end and embedded systems. Analogue & Digital circuit design Analogue & digital design is carried out using the latest schematic capture and simulation software enabling your design to be tested before manufacture. We can offer a prototyping service if you require. RF system design CDT are able to advise you on the design of communication systems that best suit your requirments. Maintenance of communications systems CDT are able to offer maintenance on a wide range of communication products, both RF and wire based systems. Sales of the following Custom designed and standard products Accessories, batteries, headsets, hands free units etc. Communication products from major manufactures. Full installation service by qualified engineers.