Cambridge Consultants completes new trials on Iridium-based global push-to-talk radio system; Successful trials of new components of US Department of Defense Distributed Tactical Communications System. Cambridge Consultants, a technology design and development firm, today announced it successfully completed initial trials with Iridium Communications Inc. (Nasdaq: IRDM) of new key components of the world’s largest push-to-talk (PTT) radio system – the US Department of Defense (DoD) Distributed Tactical Communications System (DTCS). DTCS enables soldiers in isolated areas to communicate without the need for ground infrastructure – and in locations where they often can’t pick up a geostationary satellite’s signal unless they move to higher ground.
