基本信息:
- 专利标题： Channel system
- 专利标题（中）：频道系统
- 申请号：JP3663283 申请日：1983-03-08
- 公开(公告)号：JPS59163997A 公开(公告)日：1984-09-17
- 发明人： TAKAHASHI IKUHIRO
- 申请人： Nec Corp
- 专利权人： Nec Corp
- 当前专利权人： Nec Corp
- 优先权： JP3663283 1983-03-08
- 主分类号： H04B3/03
- IPC分类号： H04B3/03 ; H04M3/40 ; H04Q3/42
摘要：
PURPOSE:To prevent a ring tone being produced to an opposite terminal by reducing the detour of a voice signal from the receiving side to the transmission side by means of the control of a supervisory circuit in a channel having a 2- wire/4-wire converting circuit of an automatic exchange. CONSTITUTION:A circuit 11 supervising the state of a terminal is provided to the 2-wire side of the 2-wire/4-wire converting circuit of the automatic exchange and an attenuating circuit 9 is provided to the 4-wire side. When the supervisory circuit 11 detects an idle state of the terminal, the output controls the attenuating circuit 9 so as to attenuate the voice signal on the channel thereby preventing the detour of the voice from the receiving side to the transmission side.
摘要（中）：
目的：通过在具有2线/ 4线的通道中的监控电路的控制，通过减少语音信号从接收侧到发送侧的迂回，防止对方端子产生振铃音 自动交换电路。 构成：在自动交换的2线/ 4线转换电路的2线侧设置有监视终端状态的电路11，并且在4线侧设置衰减电路9。 当监控电路11检测到终端的空闲状态时，输出控制衰减电路9，以衰减信道上的语音信号，从而防止语音从接收侧绕到发送侧。
公开/授权文献:
- JPS59142823U JPS59142823U - 公开/授权日：1984-09-25