公开(公告)号：US5638435A

公开(公告)日：1997-06-10

申请号：US440390

申请日：1995-05-12

Applicant: Per Svante Axling ,  Juan Hernandez

Inventor： Per Svante Axling ,  Juan Hernandez

IPC: H04Q1/50 ,  H04M1/26

CPC classification number: H04Q1/50

Abstract: An impulse convertor for converting a received telephone impulse dialing signal into a restored dialing signal has a limiter-amplifier, a signal detector, an output formatter, and a controller. The limiter-amplifier receives the impulse dialing signal from an interface b to a communication system such as a public switched telephone network or a cellular network, limits the amplitude range of the received impulse dialing signal, and compensates for attenuation of the received impulse dialing signal. The signal detector analyzes successive portions of an output signal generated by the limiter-amplifier and determines dialed digits represented by the received impulse dialing signal. The output formatter converts the dialed digits determined by the signal detector into the restored dialing signal that is provided to a device C such as a PABX. The controller coordinates operation of the limiter-amplifier, signal detector, and output formatter.

Abstract translation: 用于将接收的电话脉冲拨号信号转换成恢复的拨号信号的脉冲转换器具有限幅放大器，信号检测器，输出格式器和控制器。 限幅放大器从接口b接收到诸如公共交换电话网络或蜂窝网络的通信系统的脉冲拨号信号，限制接收到的脉冲拨号信号的振幅范围，并且补偿接收的脉冲拨号信号的衰减 。 信号检测器分析由限幅放大器产生的输出信号的连续部分，并确定由接收的脉冲拨号信号表示的拨号数字。 输出格式化器将由信号检测器确定的拨号数字转换为提供给设备C（例如PABX）的还原拨号信号。 控制器协调限幅放大器，信号检测器和输出格式器的运算。