Carrier current signaling system
作者： Lang Albert G
DOI:
关键词: Telecommunications 、 Mobile radio telephone 、 Telephone switchboard 、 Engineering 、 Class 4 telephone switch 、 DMS-100 、 Telephone exchange 、 Class 5 telephone switch 、 Dual-tone multi-frequency signaling 、 Telephone line
摘要: This invention relates to communication systems and particularly telephone including subscribers' stations connected the exchange over a power line. An object of is prevention bell tapping at subscriber which are arranged for...
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