Audio monitoring and surveillance systems composed primarily of microphones, speakers, audio base stations, audio mixers, remote call stations, rack mount assemblies, power supplies, audio interface with digital video recorders, video servers, and internet protocol cameras

'assembl':21 'audio':1,11,14,24 'base':12 'call':17 'camera':35 'compos':6 'digit':27 'interfac':25 'internet':33 'microphon':9 'mixer':15 'monitor':2 'mount':20 'power':22 'primarili':7 'protocol':34 'rack':19 'record':29 'remot':16 'server':31 'speaker':10 'station':13,18 'suppli':23 'surveil':4 'system':5 'video':28,30

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