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公开(公告)号：US4289934A
公开(公告)日：1981-09-15
申请号：US33245
申请日：1979-04-25
摘要： An automatic call distribution and voice line PBX switching system which includes a control complex having a first microprocessor based control circuit to selectively establish connections between access ports of a switching network. The control complex further includes a second microprocessor based control circuit which communicates data with a group of automatic call distribution positions, each of which is coupled to a different one of a first group of the access ports. The first and second microprocessor based control circuits communicate asynchronously through an interprocessor buffer circuit, and the number of automatic call distribution positions served by both the first and second control may be selected depending upon the particular application for the system.
摘要翻译： 一种自动呼叫分配和语音线路PBX交换系统，其包括具有第一微处理器的控制电路的控制复合体，以选择性地建立交换网络的接入端口之间的连接。 控制复合体还包括基于第二微处理器的控制电路，其将数据与一组自动呼叫分配位置进行通信，每组自动呼叫分配位置都耦合到第一组接入端口中的不同的一个。 第一和第二基于微处理器的控制电路通过处理器间缓冲器电路异步通信，并且可以根据系统的特定应用来选择由第一和第二控制所服务的自动呼叫分配位置的数量。
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公开(公告)号：US4218589A
公开(公告)日：1980-08-19
申请号：US24544
申请日：1979-03-28
申请人： Satyan G. Pitroda , Byung C. Min
发明人： Satyan G. Pitroda , Byung C. Min
CPC分类号： H04Q11/04 , H04J3/14 , H04Q1/4485 , H04Q11/0407
摘要： Apparatus and methods for testing digital tone generators in a digital time division, multiplex telecommunications switching system. The tone generator produces both continuous and interrupted tones, and testing of any tone is accomplished by determining if its successive PCM words are stuck-at-dc. (SDD) and if it is an idle tone (ITD). The combinations of ITD and SDD determine whether (i) the tone generator being tested is malfunctioning, (ii) the test method or apparatus itself has failed, or (iii) the tone generator is functioning properly.
摘要翻译： 用于数字时分数字音调发生器测试的装置和方法，多路复用电信交换系统。 音调发生器产生连续和中断的音调，并且通过确定其连续的PCM字是否被直流阻塞来完成任何音调的测试。 （SDD），如果它是空闲音（ITD）。 ITD和SDD的组合确定（i）被测试的音调发生器是否发生故障，（ii）测试方法或设备本身失败，或（iii）音调发生器正常工作。
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公开(公告)号：US4205203A
公开(公告)日：1980-05-27
申请号：US931876
申请日：1978-08-08
CPC分类号： H04Q1/4575
摘要： Different ones of a plurality of sounds or tones are digitally signaled selectively in the different time slots of recurring frame cycles by initially storing a group of PCM samples for each sound in addressable memory. As each given time slot recurs one sample of a sound preselected for that time slot is read out to a common bus, and as successive cycles occur the address signals applied to the memory during any given time slot are progressively changed to cause repeated scanning of the samples of the preselected sound. After address signals for one time slot have been pulled from a read/write memory, they are replaced by writing "next sample address" signals into the same location of that memory, the latter having a word location for each time slot and being addressed for reading and writing by control signals which exist during and uniquely identify the successive time slots of each cycle. Different scan sequences for different sounds are created by modifying the formation of "next sample address" signals under the control of characteristic-representing signals stored in a sequence memory and read out by call signals representing the preselected sound for any time slot.The preselection permits any of the sounds to be placed in any of the time slots or channels, but in the preferred form some of the time slots always carry the same sounds (fixed tones) while others may have their carried tones ("switched" or register tones) changed by commands received asynchronously from a central control unit.The methods and apparatus utilize ROM (although RAM may be employed) to pair different ones of the several sounds with different ones of several on/off schedules to form a larger plurality of distinctive "tones", any one of which may be digitally signaled in any time slot or channel.The method and the apparatus permit some of the tones to be "intercept" tones formed by two sounds transmitted alternately with a predetermined duty cycle.
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公开(公告)号：US4160884A
公开(公告)日：1979-07-10
申请号：US875330
申请日：1978-02-06
申请人： Larry D. Bishop
发明人： Larry D. Bishop
IPC分类号： H04B3/44
CPC分类号： H04B3/44 , Y10S323/902
摘要： A telephone transmission system has repeaters spaced along both the transmit and receive legs of the transmission line, with a power supply for the repeaters including a current regulator having positive and negative supply lines connecting the power supply to the two legs of the transmission line. Current surge protectors are connected from the two legs of the transmission line to ground. A pair of current sensors responsive to the current levels in the positive and negative supply lines, between the power supply and the current surge protectors closest to the power supply, produce output signals representative of the respective current levels. A control signal generating means receives the output signals from the current sensors and produces a control signal in response to a deviation of the higher current in the supply lines from a preselected reference level. The control signal is supplied to the current regulator to maintain the higher current level in the supply lines at the preselected reference level.
摘要翻译： 电话传输系统具有沿着传输线的发射端和接收端彼此分开的中继器，用于中继器的电源包括电流调节器，其具有将电源连接到传输线的两条支路的正和负电源线。 电流浪涌保护器从传输线的两条腿连接到地。 一对电流传感器响应于在电源和最靠近电源的电流浪涌保护器之间的正和负电源线中的电流电平产生表示相应电流电平的输出信号。 控制信号发生装置接收来自电流传感器的输出信号，并且响应于供应线路中的较高电流与预选参考电平的偏差而产生控制信号。 控制信号被提供给电流调节器，以将电源线中的较高电流水平保持在预选参考电平。
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公开(公告)号：US2939039A
公开(公告)日：1960-05-31
申请号：US83266359
申请日：1959-08-10
申请人： TELEFUNKEN GMBH
发明人： KONRAD SCHLUCKEBIER
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公开(公告)号：US5426425A
公开(公告)日：1995-06-20
申请号：US957662
申请日：1992-10-07
申请人： Alexander Conrad , Charles Bell
发明人： Alexander Conrad , Charles Bell
CPC分类号： G07C9/00111 , G08B3/1083
摘要： A locating and monitoring system includes transmitters worn by a person, animal, or equipment to transmit an unique identification code while moving about a facility. The code is transmitted by pulse bursts at diverse times during predetermined time intervals to prevent synchronization with resident signals in the facility. Receivers in the walls or ceilings of the facility respond to the infrared radiation of the pulse bursts and validate the identification code by a checksum of the code through a comparison with a checksum transmitted with the code. The receivers deliver validated codes to arbitrators and receive back signals indicative of the level of an individual assigned to a class wearing the transmitters. Signals from the receivers are received by arbitrators which forward the codes to a CPU for recording start and stop events indicative of movement by transmitters into and out of the reception range of the various receivers.
摘要翻译： 定位和监测系统包括由人，动物或设备佩戴的发射器，用于在围绕设施移动时发送唯一的识别码。 代码在预定时间间隔内在不同时间通过脉冲串发送以防止与设施中的驻留信号同步。 设备的墙壁或天花板中的接收器响应于脉冲串的红外辐射，并通过与用代码传输的校验和的比较来验证代码的校验和。 接收机向仲裁员递送经过验证的代码，并接收指示分配给佩戴发射机的类别的个人的级别的信号。 来自接收机的信号由仲裁器接收，仲裁器将代码转发到CPU，用于记录指示发射机进入和离开各种接收机的接收范围的移动的开始和停止事件。
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公开(公告)号：US4377843A
公开(公告)日：1983-03-22
申请号：US31374
申请日：1979-04-19
CPC分类号： H04Q11/0407 , G06F13/22
摘要： A microprocessor-based circuit for interfacing between a plurality of serial data terminals and an external parallel data operating system. The interface circuit includes an asynchronous receiver-transmitter, which converts serial data to parallel data and converts parallel data to serial data. The interface circuit multiplexes received serial data from the terminals and couples that serial data to the receiver-transmitter. The microprocessor in the interface circuit further controls the transfer of this now-parallel data to the external parallel data operating system. The microprocessor also controls the transfer of parallel data from the parallel data operating system, which is converted to serial data by the asynchronous receiver-transmitter, demultiplexed by the interface circuit and transmitted to the terminals. Both the transmission and the reception of serial data is coordinated by the microprocessor, which also controls the receiver-transmitter and a set of registers connected to the operating system on a parallel data bus.
摘要翻译： 一种用于在多个串行数据终端和外部并行数据操作系统之间进行接口的基于微处理器的电路。 接口电路包括异步接收机 - 发射机，其将串行数据转换为并行数据，并将并行数据转换为串行数据。 接口电路将接收到的串行数据从终端复用，并将该串行数据耦合到接收机 - 发射机。 接口电路中的微处理器进一步控制将此并行数据传输到外部并行数据操作系统。 微处理器还控制从并行数据操作系统传输并行数据，由异步接收发射机转换为串行数据，由接口电路解复用并发送到终端。 串行数据的传输和接收都由微处理器协调，微处理器也控制接收机 - 发射机和一组在并行数据总线上连接到操作系统的寄存器。
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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：US4267593A
公开(公告)日：1981-05-12
申请号：US48830
申请日：1979-06-15
申请人： John F. Regan , Bakulesh A. Mehta
发明人： John F. Regan , Bakulesh A. Mehta
IPC分类号： H04M3/56
CPC分类号： H04M3/569
摘要： A digital conferencing arrangement for use in a digital telecommunications switching system. Digital coded signals representative of sampled analog signals are compared and the results of the comparison noted to identify the present speaker in the conference. A comparison result indicating a proposed new speaker initiates a delay interval during which subsequent samples are compared to assure that the proposed new speaker indeed has the largest analog signal during the delay window. Upon verification of the proposed new speaker, the control of the conference circuit is transferred to him.
摘要翻译： 一种用于数字电信交换系统的数字会议装置。 比较表示采样的模拟信号的数字编码信号，并记录比较结果以识别会议中的本发明人。 指示所提出的新的扬声器的比较结果启动延迟间隔，在此间隔期间比较后续样本，以确保所提出的新的扬声器确实在延迟窗口期间具有最大的模拟信号。 在对新发言人进行核实后，将会议电路的控制转交给他。
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公开(公告)号：US4160945A
公开(公告)日：1979-07-10
申请号：US833765
申请日：1977-09-16
申请人： Ian A. Schorr
发明人： Ian A. Schorr
CPC分类号： H02M3/156 , H02M3/3378
摘要： A switching regulator generates controllable pulses from a primary d-c. voltage source and then smooths the pulses to form a d-c. output that varies according to the changes in the pulses. A reference voltage source establishes a d-c. reference signal that varies in magnitude with any variations in the magnitude of the d-c. output but with a substantially constant differential in magnitude between the reference signal and the d-c. output. A voltage or current sensor generates a signal that varies in accordance with changes in the voltage or current level of the d-c. output, and a comparator detects the difference between the reference signal and the signal from the sensing means to produce a control signal that varies according to changes in the difference between the two signals. The pulses that form the d-c. output are adjusted in response to the control signal to maintain the output at a regulated voltage or current level. An auxiliary internal power supply is provided for the reference voltage source and the comparator and the current flow is returned through the reference voltage source and the comparator to the auxiliary internal power supply to minimize power losses in the reference voltage source and the comparator. A predetermined d-c. dry voltage is superimposed on the d-c. voltage from the primary source and floats with respect to the reference signal and the d-c. output.
摘要翻译： 开关稳压器从主d-c产生可控脉冲。 电压源，然后平滑脉冲以形成d-c。 输出根据脉冲的变化而变化。 参考电压源建立d-c。 参考信号随着d-c幅度的任何变化而在幅度上变化。 输出，但是在参考信号和d-c之间具有基本恒定的幅度差。 输出。 电压或电流传感器产生根据d-c的电压或电流电平的变化而变化的信号。 输出，并且比较器检测参考信号和来自感测装置的信号之间的差异，以产生根据两个信号之间的差异的变化而变化的控制信号。 形成d-c的脉冲。 响应于控制信号调节输出，以将输出保持在稳定的电压或电流水平。 为参考电压源和比较器提供辅助内部电源，电流通过参考电压源和比较器返回到辅助内部电源，以最小化参考电压源和比较器中的功率损耗。 预定的d-c。 干电压叠加在d-c上。 相对于参考信号和d-c浮动的来自主源的电压。 输出。
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