] It works like this: The calls are recorded by ] geo-stationary spy satellites and listening stations, ] such as the UK's Menwith Hill, which combine ] satellite-intercepted calls and trunk landline intercepts ] and forward them on to centres, such as the US' Fort ] Meade, where supercomputers work on the recordings in ] real time. ] A SAM-650 product is called a 192 GFLOPS DSP ] supercomputer by TMS. It is just 3U high and has 24 DSP ] chips and is positioned as a back-end number cruncher ] controlled by any standard server - a similar ] architecture to that used by Cray supercomputers. There ] are vast streams of information coming from recorded ] telephone conversations. The ability to have the DSPs ] work in parallel speeds up analysis enormously. Spinning ] hard drives can't feed the DSPs fast enough, nor are they ] quick enough for subsequent software analysis of the ] data. Consequently TMS uses its solid state technology to ] provide a buffer up to 32GB that keeps the DSPs operating ] at full speed. ] ] A cluster of five SAM-650's provides a terra flop of ] processing power; one trillion floating point operations ] per second. Techworld.com - Want to know the hardware behind Echelon? |