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公开(公告)号：US06567512B1
公开(公告)日：2003-05-20
申请号：US09366747
申请日：1999-08-04
申请人： Spencer L. Hermanson , William G. Marks , Mario E. Jauregui , Charles R. Jackson , Maxim Bakaleynik
发明人： Spencer L. Hermanson , William G. Marks , Mario E. Jauregui , Charles R. Jackson , Maxim Bakaleynik
IPC分类号： H04M342
CPC分类号： H04M1/2745
摘要： An electronic programmer for the auto-dial functions of a telephone comprises an apparatus which electrically connects the rows and columns lines on the keyboard of a telephone so as to mimic the pressing the buttons on the telephone keypad.
摘要翻译： 一种用于电话自动拨号功能的电子编程器包括电连接电话键盘上的行和列线以便模拟按压电话键盘上的按钮的装置。
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公开(公告)号：US06252957B1
公开(公告)日：2001-06-26
申请号：US09168297
申请日：1998-10-07
IPC分类号： H04M100
CPC分类号： H04M1/72
摘要： A line-powered circuit for connecting a telephone line to a telephone voice circuit comprised of a digital part and an analog part. The digital part is a logic circuit for generating a line connect signal that indicates a telephone line should be connected to the voice circuit. The power for operating the logic circuit is provided by the line voltage associated with the tip and ring leads of the telephone line. The analog part comprises a first switch means for connecting the voice circuit to the tip lead in response to the line connect signal, and a second switch means for connecting the voice circuit to a ring lead in response to the line connect signal.
摘要翻译： 一种用于将电话线连接到由数字部分和模拟部分组成的电话语音电路的线路供电电路。 数字部分是用于产生指示电话线应该连接到语音电路的线路连接信号的逻辑电路。 用于操作逻辑电路的电源由与电话线的尖端和环形引线相关联的线路电压提供。 模拟部分包括用于响应于线路连接信号将语音电路连接到尖端引线的第一开关装置和用于响应于线路连接信号将语音电路连接到环形引线的第二开关装置。
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公开(公告)号：US06456713B1
公开(公告)日：2002-09-24
申请号：US09109609
申请日：1998-07-02
IPC分类号： H04M100
CPC分类号： H04M11/06 , H04M3/42314
摘要： A circuit for notifying a PBX that a data port in a telephone connected to the PBX is about to be used. The circuit comprises a current sensor for generating a signal that indicates a modem is drawing current through the data port. A large resistor limits the current being drawn through the data port to a level that does not indicate an off-hook condition to either the PBX or the modem. In response to the signal generated by the current sensor, a separate telephone circuit provides an off-hook condition that draws a first dial tone from the PBX. A microprocessor in the circuit generates a signal that causes a dialer in the telephone circuit to dial a number that notifies the PBX that the modem is attempting to access the PBX through the data port. After the PBX is notified of the imminent data port usage, it presents a second dial tone on line two which is the dial tone for an outside line. The microprocessor then activates a thyristor which electrically bypasses the resistor and allows sufficient current to be drawn by the modem to maintain the off-hook condition.
摘要翻译： 用于通知PBX的电路将要使用连接到集团电话的电话中的数据端口。 该电路包括用于产生指示调制解调器正在通过数据端口绘制电流的信号的电流传感器。 一个大电阻将通过数据端口吸取的电流限制在不表示PBX或调制解调器的摘机状态的水平。 响应于由电流传感器产生的信号，单独的电话电路提供从PBX抽取第一拨号音的摘机状态。 电路中的微处理器产生一个信号，使得电话电路中的拨号器拨打一个号码，该号码通知PBX调制解调器试图通过数据端口访问PBX。 在PBX被通知即将来临的数据端口使用之后，它会在第二行显示第二个拨号音，这是外线的拨号音。 然后微处理器激活电路旁路电阻器的晶闸管，并允许调制解调器提供足够的电流以保持摘机状态。
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公开(公告)号：US07251321B2
公开(公告)日：2007-07-31
申请号：US10631914
申请日：2003-07-30
IPC分类号： H04M1/00
CPC分类号： H04M19/04 , H04M19/042
摘要： Crescendo telephone ringers and methods of providing a crescendo telephone ring signal. The crescendo telephone ringer provides a gradual increase in audible ringing volume as a sequence of incoming electrical ring signals is detected. According to one embodiment, upon receipt of an incoming call, a first audible ring signal corresponding to a first detected electrical ring signal is set to a minimum volume. Subsequent audible ring signals corresponding to subsequent detected electrical ring signals are set to increasing volume levels, and finally to a maximum ringer volume.
摘要翻译： 渐强电话铃声和提供渐强电话铃声信号的方法。 渐强电话铃声提供了可听响铃音量的逐渐增加，因为检测到一系列进入的电环信号。 根据一个实施例，在接收到来电时，对应于第一检测到的电环信号的第一可听振铃信号被设置为最小音量。 对应于随后检测到的电环信号的随后的可听铃信号被设置为增加音量级别，最后设置为最大振铃音量。
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公开(公告)号：US5768366A
公开(公告)日：1998-06-16
申请号：US832485
申请日：1997-04-02
摘要： A message waiting circuit comprised of a pair of electrical leads which carry a message waiting signal, a capacitor for storing electrical energy extracted from the message waiting signal, a transistor for allowing the capacitor to charge when the message waiting signal is within a predetermined range; a Darlington transistor for causing the capacitor to discharge; and a light emitting diode (LED) which emits light when the capacitor discharges. The flashing LED indicates that a message is waiting for a user of the telephone set associated with the message waiting circuit. Approximately ten to twenty-five message waiting circuits and associated telephone sets can be connected to a single telephone line.
摘要翻译： 一种消息等待电路，包括一对携带消息等待信号的电引线，用于存储从消息等待信号中提取的电能的电容器;当消息等待信号在预定范围内时允许电容器充电的晶体管; 用于使电容器放电的达林顿晶体管; 以及当电容器放电时发光的发光二极管（LED）。 闪烁的LED指示消息正在等待与消息等待电路相关联的电话机的用户。 大约十到二十五个消息等待电路和相关联的电话机可以连接到单个电话线。
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公开(公告)号：US4313038A
公开(公告)日：1982-01-26
申请号：US122563
申请日：1980-02-19
摘要： A DTMF signal receiver, for telephone systems, includes an amplifier with automatic gain control for receiving and amplifying DTMF and audio signals. A series of bandpass and notch filters receive the output from the amplifier for producing bandpass and notch outputs in response to the DTMF frequencies. A detector receives the bandpass output from each of the filters to produce a signal representing the presence or absence of a signal of each DTMF frequency in the amplifier output, and a DTMF decoder receives the signals from all such detectors and produces output signals in response to simultaneous detection of preselected pairs of DTMF frequencies. A voice guard circuit receives the notch output from the last filter in the series and compares the amplitude of that notch output with a threshold level to produce a disable signal whenever the amplitude of the notch output is greater than the threshold. This disable signal is supplied to the DTMF decoder for disabling the production of output signals by the decoder and thereby preventing the detection of invalid DTMF signals.
摘要翻译： 用于电话系统的DTMF信号接收器包括具有用于接收和放大DTMF和音频信号的自动增益控制的放大器。 一系列带通和陷波滤波器接收放大器的输出，以响应DTMF频率产生带通和陷波输出。 检测器从每个滤波器接收带通输出以产生表示放大器输出中每个DTMF频率的信号的存在或不存在的信号，并且DTMF解码器从所有这样的检测器接收信号并产生响应于 同时检测预选的DTMF频率对。 语音保护电路从串联的最后一个滤波器接收陷波输出，并且每当陷波输出的幅度大于阈值时，将该陷波输出的幅度与阈值电平进行比较，以产生禁用信号。 该禁止信号被提供给DTMF解码器，用于禁止解码器产生输出信号，从而防止无效DTMF信号的检测。
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公开(公告)号：US4219699A
公开(公告)日：1980-08-26
申请号：US951516
申请日：1978-10-13
摘要： A station-to-station supervision system for a telephone system has a dual tone multiple frequency (DTMF) signal generator connected to the transmit line at each subscriber station, and a standard audible signal generator is connected to the receive line at each subscriber station for generating dial tone, ringback tone, reorder tone and busy tone in response to supervisory DTMF signals. Control means associated with each subscriber station effect the generation of a dial tone disable DTMF signal from a calling station in response to the combination of an off-hook condition at the calling station and the absence of a DTMF signal from any other station in the system; a busy tone command DTMF signal from any given station in response to the combination of an address signal for that station and an off-hook condition at that station; and a ringback tone command DTMF signal from any given station in response to the combination of an address signal for that station and an on-hook condition at that station. The control means also generates a DTMF signal for terminating ringback tone at a calling station when a called station comes off-hook. The system also includes optional operating modes such as push-to-talk, conference calls, group calls, and all call.
摘要翻译： 用于电话系统的站间站监视系统具有连接到每个用户站处的发送线路的双音多频（DTMF）信号发生器，并且标准可听信号发生器连接到每个用户站处的接收线路 响应于监听的DTMF信号，产生拨号音，回铃音，重新排序音和忙音。 与每个用户站相关联的控制装置响应于呼叫站处的摘机状况和来自系统中任何其他站的DTMF信号的组合而产生来自呼叫站的拨号音禁用DTMF信号 ; 响应于该站的地址信号和该站的摘机状态的组合，来自任何给定站的忙音命令DTMF信号; 以及来自任何给定站的回铃音命令DTMF信号，以响应该站的地址信号和该站的挂机状态的组合。 当呼叫站摘机时，控制装置还产生用于在呼叫站处终止回铃音的DTMF信号。 该系统还包括可选的操作模式，如一键通，电话会议，群组呼叫和所有呼叫。
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公开(公告)号：USD531613S1
公开(公告)日：2006-11-07
申请号：US29226504
申请日：2005-03-28
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