computer software, computer database software, and computer system, comprising, computer chassis, digital signal processing board, radio frequency receiver, digital tuner, and network interface for measuring and processing radio frequency characteristics of cellular telephone signals for detecting fraudulent cellular phone calls

'board':15 'call':40 'cellular':32,38 'characterist':30 'chassi':11 'compris':9 'comput':1,3,7,10 'databas':4 'detect':36 'digit':12,19 'fraudul':37 'frequenc':17,29 'interfac':23 'measur':25 'network':22 'phone':39 'process':14,27 'radio':16,28 'receiv':18 'signal':13,34 'softwar':2,5 'system':8 'telephon':33 'tuner':20

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