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86 条记录 (耗时 0.012 秒)

    Holding sound generator for telephone
    75.
    发明公开
    Holding sound generator for telephone 失效
    保持声音发声器

    公开(公告)号：EP0371430A3

    公开(公告)日：1992-04-01

    申请号：EP89121850.5

    申请日：1989-11-27

    申请人： ROHM CO., LTD.

    发明人： Ikefuji, Yoshihiro ROHM CO., LTD.

    IPC分类号： H04M1/50 ,  H04M1/00

    CPC分类号： H04M1/80 ,  H04M1/505

    摘要： A holding sound generator circuit, for a telephone, outputs a holding sound to a telephone on the other end of the line. A string of holding sound scales are stored in ROM beforehand, and the holding sound scale range may be read therefrom by a holding designated signal, thus composing a pronunciation signal. For composing the pronounciation signal, the primary clock signal is divided in frequency by a integral or fractional number to obtain a pulse for a desired digital/analog conversion. By setting the frequency-division ratio optionally and down to a decimal, it is possible to set the frequency of the primary clock signal at a low level.

    Sensing exchange signalling requirements
    76.
    发明公开
    Sensing exchange signalling requirements 失效
    Erfassung der Signalisierungserfordernisse einer Vermittlungsanlage。

    公开(公告)号：EP0427416A2

    公开(公告)日：1991-05-15

    申请号：EP90311549.1

    申请日：1990-10-22

    申请人： NORTHERN TELECOM LIMITED

    发明人： Barnes, George John Preston ,  Verrells, Michael Vincent

    IPC分类号： H04M1/26 ,  H04M1/50

    CPC分类号： H04M1/82 ,  H04M1/30

    摘要： According to the present invention there is provided a dual signalling standard subscriber's telephone equipment including means wherein the equipment is initially set to perform dialling signalling in a first mode, means responsive to initiation of the handset 'OFF-HOOK' condition to determine the presence or absence of significant line signal for a predetermined period of time (10-13), and means responsive to the output of the determining means to reset the equipment to the first or a second mode (15) for performing subsequent dialling signalling.

    摘要翻译： 根据本发明，提供了一种双信令标准用户的电话设备，其包括装置，其中设备被初始设置为以第一模式执行拨号信令，响应于启动手持机的“离线”状态以确定存在或 在预定时间段（10-13）不存在明显的线路信号，以及响应于确定装置的输出将设备复位到用于执行后续拨号信令的第一或第二模式（15）的装置。

    Methods of generating waveforms
    77.
    发明公开
    Methods of generating waveforms 失效
    Verfahren zur Wellenformenerzeugung。

    公开(公告)号：EP0349162A2

    公开(公告)日：1990-01-03

    申请号：EP89306072.3

    申请日：1989-06-15

    申请人： ADVANCED MICRO DEVICES, INC.

    发明人： Hattangadi, Rajiv Mohan ,  Raghuveer, Mysore

    IPC分类号： H04M1/50 ,  G06F7/548

    CPC分类号： H04M1/505 ,  G06F7/548

    摘要： A method of generating pure and decaying sinusoidal waveforms is readily implemented on arithmetic processors found in telecommunications circuits. The method is based on finite-difference equations and provides a sequence of signals having a high degree of spectral accuracy compared with presently-used methods. The sequence of signals can be generated in real-time without templates (ROM-stored patterns) because the method requires only two multiplications (16,18) and one addition (12) for each signal value generated in the sequence. The method finds application in dual-tone, multi-frequency (DTMF) telephone dialing systems.

    摘要翻译： 在电信电路中发现的算术处理器上容易实现产生纯衰减和衰减正弦波形的方法。 该方法基于有限差分方程，并提供与目前使用的方法相比具有高度谱精度的信号序列。 由于该方法对序列中生成的每个信号值仅需要两次乘法（16,18）和一次加法（12），所以可以实时地生成信号序列，而不需要模板（ROM存储的模式）。 该方法在双音多频（DTMF）电话拨号系统中得到应用。

    Dialer semiconductor integrated circuit
    78.
    发明公开
    Dialer semiconductor integrated circuit 失效
    Integrierte HalbleiterschaltungfürWähleinrichtung。

    公开(公告)号：EP0347164A2

    公开(公告)日：1989-12-20

    申请号：EP89305953.5

    申请日：1989-06-13

    申请人： NEC CORPORATION

    发明人： Fujii, Takashi

    IPC分类号： H04M1/50 ,  H04M1/31

    CPC分类号： H04M1/27 ,  H04M1/30

    摘要： A dialer semiconductor integrated circuit is comprised of a microprocessor, an interface to the microprocessor, and an input device effective to define desired function.

    摘要翻译： 拨号半导体集成电路包括微处理器，与微处理器的接口以及有效地定义所需功能的输入设备。

    Digital transmission system
    79.
    发明公开
    Digital transmission system 失效
    数字传输系统

    公开(公告)号：EP0257687A3

    公开(公告)日：1989-12-20

    申请号：EP87201504.5

    申请日：1987-08-06

    申请人： ALCATEL N.V.

    发明人： Reusens, Peter Paul Frans

    IPC分类号： H04M1/50 ,  G06F1/02

    CPC分类号： H04M1/505 ,  G06F1/025

    摘要： A digital transmission system including a digital signal generator (GEN) able to generate a rectangular output signal (SX2, SX2ʹ) , e.g. in the audible frequency range. The frequency and the amplitude of this output signal are respectively determined by the frequency (500/16,000 Hz) of a square wave (SQ1, SQ1ʹ) and by the duty cycle of a rectangular wave (SE0) both waves being created in the generator under control of an incoming digital word, the rectangular wave chopping the square wave. The frequency content of the spectrum of the output signal is identical to that of the square wave.

    摘要翻译： 包括能够产生矩形输出信号（SX2，SX2'）的数字信号发生器（GEN）的数字传输系统， 在可听频率范围内。 该输出信号的频率和幅度分别由方波（SQ1，SQ1'）的频率（500 / 16,000Hz）和在发电机中产生的矩形波（SE0）两个波的占空比确定 控制输入​​的数字字，矩形波斩波方波。 输出信号频谱的频率成分与方波的频谱成分相同。

    Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal
    80.
    发明公开
    Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal 失效
    Wählsignalgeneratorzur Erzeugung vonWählimpulssignalenund Zweiton-Mehrfrequenzsignalen。

    公开(公告)号：EP0346243A2

    公开(公告)日：1989-12-13

    申请号：EP89401616.1

    申请日：1989-06-09

    申请人： FUJITSU LIMITED

    发明人： Hasegawa, Takashi

    IPC分类号： H04M1/50 ,  H04M1/30 ,  H03M7/22

    CPC分类号： H04M1/30 ,  H04M1/505

    摘要： A dial signal generator supplied with dial data corresponding to a dial number, includes a dial data register (13) for storing the dial data, a decoder (81) for decoding the dial data supplied from the dial data register to thereby generate corresponding row and column numbers based on a dual tone multi-frequency (DTMF) system, a DTMF generator (14) for generating a DTMF signal from the row and column numbers generated by the decoder, and a dial pulse generator (16) for generating a dial pulse signal from the dial data supplied from the dial data register.

    摘要翻译： 提供与拨号号码对应的拨号数据的拨号信号发生器包括用于存储拨号数据的拨号数据寄存器（13），用于解码从拨号数据寄存器提供的拨号数据的解码器（81），从而生成相应的行和 基于双音多频（DTMF）系统的列号，DTMF发生器（14），用于根据由解码器产生的行和列号产生DTMF信号;以及拨号脉冲发生器（16），用于产生拨号脉冲 来自拨号数据寄存器提供的拨号数据的信号。