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ITMI921809A1
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Arrangement for measuring the electromagnetic susceptibility of an electrical device
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ITMI913193A1
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Circuit for a subscriber's telephone set
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ITMI911556D0
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Device and method for measuring electromagnetic susceptibility of an electrical apparatus
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ITMI910437A1
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Subscriber telephone receiver with enhanced protection against radio frequency (r.f.) interference
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EP0352827A2
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Intercommunicating telephone set system on bifilar line
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WO8804123A1
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Digital telephone switching exchange, particularly for private systems (pabx)
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IT8721101D0
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PCM signals switching element for PBX peripherals
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EP0033821A2
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Intelligent interfacing apparatus for the automatic management of a switched or dedicated telecommunication line
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