发明名称 Digital added main line system
摘要 A method and apparatus for transmitting and receiving multiple telephone transmission signals over a single twisted pair. An analog signal from a local switching station is converted to an 80 kbits/sec signal for transmission over a twisted pair. A remote terminal converts the 80 kbits/sec signal back into a conventional analog signal for use in conventional telephone, facsimile or other related equipment.
申请公布号 US5473613(A) 申请公布日期 1995.12.05
申请号 US19950382094 申请日期 1995.01.27
申请人 RAYCHEM CORPORATION 发明人 BLIVEN, DAVID C.
分类号 H04J3/04;H04J3/18;H04J99/00;H04M11/06;H04Q3/60;H04Q11/04;(IPC1-7):H04J3/00;H04M1/00;H04Q5/00;H04L25/34 主分类号 H04J3/04
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