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1.发明授权Current-analyzing and coding device usable particularly in telecommunications for number dialing by means of a key set 失效电流分析和编码设备，特别适用于通过键盘进行数字拨号的电信
公开(公告)号：US3777068A
公开(公告)日：1973-12-04
申请号：US3777068D
申请日：1971-07-30
Applicant: CIT ALCATEL
Abstract: A current analyzer-coder for a number-dialing system by keyboard control with impedance variation, wherein the state of a plurality of current analyzing relays which operate only in prescribed current ranges indicates the impedance of the line, and means is provided to assure that only a single analyzing relay is engaged for each resistance value, the combination further including means for transferring the information being received to a register or recorder and consisting of a gate controlling a thyristor, and a control device authorizing the transfer only at a specific instant.
Abstract translation: 一种用于具有阻抗变化的键盘控制的数字拨号系统的分析器编码器，其中仅在规定电流范围内操作的多个电流分析继电器的状态表示线路的阻抗，并且提供装置以确保仅仅 为每个电阻值接合单个分析继电器，该组合还包括用于将正在接收的信息传送到寄存器或记录器并由控制晶闸管的门组成的组合以及仅在特定时刻授权传送的控制装置。
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公开(公告)号：SE363561B
公开(公告)日：1974-01-21
申请号：SE284071
申请日：1971-03-05
Applicant: CIT ALCATEL
IPC: H04Q1/38
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