公开(公告)号：US3609249A

公开(公告)日：1971-09-28

申请号：US3609249D

申请日：1969-07-09

Applicant: INT STANDARD ELECTRIC CORP

Inventor： PINEDE EDOUARD

IPC: H04M9/00 ,  H04Q1/30 ,  H04M1/50

CPC classification number: H04M9/002 ,  H04Q1/30

Abstract: A key telephone system is made for operation with either pushbutton or rotary dial equipment. Initially, digital signals are sent to one of two receivers which responds exclusively to pushbutton or rotary dials, respectively. These two receivers are connected to a common control circuit which supervises ringing and provides answer supervision to operate the key system, per se.

公开(公告)号：US3689705A

公开(公告)日：1972-09-05

申请号：US3689705D

申请日：1970-06-08

Applicant: INT STANDARD ELECTRIC CORP

Inventor： PINEDE EDOUARD ,  KAM ABRAHAM DE

IPC: H04M19/02 ,  H04Q5/08 ,  H04M3/02

CPC classification number: H04M19/02 ,  H04Q5/08

Abstract: A telephone party line signalling system which employs an electronic monitor circuit at the output end of a central office switching circuit to detect the code of any coded ringing signal emanating from the office. Responsive to this code, the monitor circuit stores and re-encodes these signals into a signal in other forms. The re-encoded signal is sent out over a called line, the other signal form being a multifrequency set of tones which characterize a particular digit in the well known pushbutton tone signalling, for example. Each subscriber station is adapted to respond to the combination of the frequencies comprising these tones and to locally supply ringing current to its own subscriber station.

Abstract translation: 一种电话线信令系统，其在中心局交换电路的输出端采用电子监控电路，以检测从办公室发出的任何编码振铃信号的代码。 响应于该代码，监视电路将这些信号存储并重新编码成其他形式的信号。 重新编码的信号通过被叫线路发送出去，另一个信号形式是例如在众所周知的按钮音信令中表征特定数字的多频音调组合。 每个用户站适于响应包括这些音调的频率的组合，并且向其自己的用户台本地提供振铃电流。