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1. 发明授权

US4099125A Frequency error correction circuit 失效
标题翻译：频率纠错电路
公开(公告)号：US4099125A
公开(公告)日：1978-07-04
申请号：US699020
申请日：1976-06-23
申请人： Robert McKay Bennett, Jr. , James Leslie Osborn
发明人： Robert McKay Bennett, Jr. , James Leslie Osborn
IPC分类号： H03L7/07 , H04Q1/446 , H04B1/26 , H03B3/06
CPC分类号： H04Q1/446 , H03L7/07
摘要： A circuit for correcting frequency errors in an incoming signal that includes a particular frequency signal. The circuit includes dual phase locked loop circuitry for providing a frequency feedback control, detecting circuitry for detecting the presence of the particular coded signal and generating a hold signal, and a sample and hold circuitry disposed in the feedback path of the phase locked loop circuitry and responsive to the hold signal for setting the feedback control at a particular value to provide an optimal frequency error correction for the particular frequency signal and for holding the feedback control at the particular value for the entire spectrum of the incoming signal, whereby the frequency feedback control set for the particular frequency tone is used for the entire spectrum of the incoming signal to minimize the error in the output frequencies of the circuit.
摘要翻译：一种用于校正包括特定频率信号的输入信号中的频率误差的电路。该电路包括用于提供频率反馈控制的双锁相环电路，用于检测特定编码信号的存在和产生保持信号的检测电路以及设置在锁相环电路的反馈路径中的取样和保持电路，以及响应于保持信号将反馈控制设置在特定值，以为特定频率信号提供最佳频率误差校正，并将反馈控制保持在输入信号的整个频谱的特定值，由此频率反馈控制为特定频率设置的信号用于输入信号的整个频谱，以最小化电路输出频率的误差。

2. 发明授权

US4037171A High speed tone decoder utilizing a phase-locked loop 失效
标题翻译：利用锁相环的高速音调解码器
公开(公告)号：US4037171A
公开(公告)日：1977-07-19
申请号：US658728
申请日：1976-02-17
申请人： Robert Roger Cordell
发明人： Robert Roger Cordell
IPC分类号： H04B1/10 , H03D1/22 , H03L7/087 , H03L7/095 , H03L7/10 , H04L27/00 , H04Q1/446 , H03B3/04
CPC分类号： H03L7/10 , H03L7/087 , H04Q1/446
摘要： A narrow-band tone decoder has a controllable oscillator, connected in a fast-capture phase-locked loop, for generating a signal having a frequency determined by a control signal produced within the loop. A synchronous detector, which responds to an input signal of the tone decoder and to a signal from the controllable oscillator, produces a signal having a magnitude dependent upon the magnitudes of the input signal and of the signal from the controllable oscillator. A window comparator monitors the control signal within the loop for deciding when the generated signal is within a predetermined frequency range.
摘要翻译：窄带音调解码器具有连接在快速捕获锁相环中的可控振荡器，用于产生具有由在该环路内产生的控制信号确定的频率的信号。响应音调解码器的输入信号和来自可控振荡器的信号的同步检测器产生具有取决于输入信号的幅度和来自可控振荡器的信号的幅度的信号。窗口比较器监视环路内的控制信号，以决定何时产生的信号在预定频率范围内。

3. 发明授权

US2814674A Telephone trunk supervisory signalling system 失效
标题翻译：电话中继监控信令系统
公开(公告)号：US2814674A
公开(公告)日：1957-11-26
申请号：US47072254
申请日：1954-11-23
申请人： SIEMENS EDISON SWAN LTD
发明人： ALLEN STALLWORTHY FRANK , WILLIAM HICKS PERCY
IPC分类号： H04Q1/446 , H04Q3/00
CPC分类号： H04Q1/446 , H04Q3/0016

4. 发明授权

US06212265B1 Method and apparatus for electronic mail notification 失效
标题翻译：电子邮件通知的方法和装置
公开(公告)号：US06212265B1
公开(公告)日：2001-04-03
申请号：US09238118
申请日：1999-01-27
申请人： Darin Duphorne
发明人： Darin Duphorne
IPC分类号： H04M156
CPC分类号： H04L51/24 , H04L51/12 , H04M1/57 , H04M1/65 , H04M1/82 , H04M3/02 , H04M3/5307 , H04M3/537 , H04M2203/4536 , H04Q1/446
摘要： Existing wire-line public switched telephone networks and Caller Identification (“CallerID”) systems operated by local telephone companies are utilized to deliver email notification to users via the users'telephone lines. The present invention queries the user's ISP remote server to determine whether any email addressed to the user is received by and/or stored thereon and, if so, causes an associated CallerID server of, for instance, the local telephone company to send an email notification signal in a format compatible with operating CallerID protocols to an email notification device using a public switched telephone network. By transmitting email notification signals over existing telephone lines, the present invention is widely available to users and advantageously eliminates the need for users to maintain a paging or cable service and, perhaps more importantly, does not require the user to maintain an online cable connection, an online Internet connection, or a paging device. In some embodiments, email notification signals in accordance with the present invention are transmitted during telephone ringing intervals and, in other embodiments, are transmitted prior to the first telephone ringing signal. In one embodiment, an email notification signal containing at least a portion of the text of unread email received by and/or stored on the user ISP email server is transmitted to the user via the public switched telephone network.
摘要翻译：现有的有线公共交换电话网络和由本地电话公司运营的主叫识别（“CallerID”）系统被用来通过用户的电话线向用户发送电子邮件通知。本发明查询用户的ISP远程服务器，以确定是否通过和/或存储了该用户的任何电子邮件，并且如果是这样，则导致例如本地电话公司的相关联的呼叫者服务器发送电子邮件通知以与使用公共交换电话网络的电子邮件通知设备操作CallerID协议的格式的信号。通过在现有电话线上发送电子邮件通知信号，本发明可广泛地向用户提供，有利地消除了用户维护寻呼或有线服务的需要，或许更重要的是不要求用户维护在线电缆连接，在线互联网连接或寻呼设备。在一些实施例中，根据本发明的电子邮件通知信号在电话振铃间隔期间发送，并且在其它实施例中，在第一电话振铃信号之前被发送。在一个实施例中，包含由用户ISP电子邮件服务器接收和/或存储在用户ISP电子邮件服务器中的至少一部分未阅读电子邮件的电子邮件通知信号经由公共交换电话网络被发送给用户。

5. 发明授权

US3571522A Tone detector 失效
标题翻译：音调检测器
公开(公告)号：US3571522A
公开(公告)日：1971-03-16
申请号：US3571522D
申请日：1968-11-29
申请人： BELL TELEPHONE LABOR INC
发明人： COX LESLIE A
IPC分类号： H04L27/156 , H04Q1/446 , H03D3/02 , H04M1/50
CPC分类号： H04L27/1563 , H04Q1/446
摘要： An inband signal tone detector is described in which an incoming signal is compared with the same signal delayed for a fixed time to determine degree of alternation asymmetry of the incoming signal. The result of the comparison is evaluated to detect the presence of the signal tone and the absence of all other signals.

6. 发明授权

US3349191A Talk-off protection for in-band telephone signaling systems 失效
标题翻译：带内电话信令系统的对讲保护
公开(公告)号：US3349191A
公开(公告)日：1967-10-24
申请号：US42407765
申请日：1965-01-07
申请人： BELL TELEPHONE LABOR INC
发明人： HENRY MANN
IPC分类号： H04Q1/446
CPC分类号： H04Q1/446

7. 发明授权

US06385299B1 Line testing in a telecommunications network 失效
标题翻译：电信网络的线路测试
公开(公告)号：US06385299B1
公开(公告)日：2002-05-07
申请号：US09612388
申请日：2000-07-07
申请人： Alvin Brooks , Frank Graham Ward , Stephen F Lee
发明人： Alvin Brooks , Frank Graham Ward , Stephen F Lee
IPC分类号： H04M124
CPC分类号： H04M3/229 , H04M3/30 , H04M3/487 , H04M7/00 , H04Q1/446 , H04Q3/72
摘要： A centralized test apparatus is provided for a telecommunications network which includes local switches and a core network. Each local switch is connected through terminating lines to terminating equipment such as telephone handsets. The test apparatus enables a field engineer to obtain the identity of a terminating line from one of the local switches. When a field engineer dials the number of the test apparatus, the test apparatus retrieves the calling line identity on answering the call. It then transmits the calling line identity in speech form back to the calling line. After transmitting the calling line identity, the test apparatus offers a menu of further services which comprise a ring back service and the provision of a test tone on a specified telephone line.
摘要翻译：为包括本地交换机和核心网络的电信网络提供集中测试装置。每个本地交换机通过终端线路连接到终端设备，如电话手机。测试装置使得现场工程师能够从本地交换机之一获得终端线路的标识。当现场工程师拨打测试设备的号码时，测试设备在应答呼叫时检索呼叫线路标识。然后将呼叫线路身份以语音形式发送回呼叫线路。在发送呼叫线路标识之后，测试设备提供包括回铃服务和在指定电话线上提供测试音的其它服务的菜单。

8. 发明授权

US4945555A Method and means for remote testing of unused telephone lines 失效
标题翻译：远程测试未使用的电话线路的方法和手段
公开(公告)号：US4945555A
公开(公告)日：1990-07-31
申请号：US418241
申请日：1989-10-06
申请人： Christopher R. Teumer , Mark A. Mendes
发明人： Christopher R. Teumer , Mark A. Mendes
IPC分类号： H04M3/30 , H04Q1/14 , H04Q1/446
CPC分类号： H04M3/30 , H04M3/308 , H04M2201/02 , H04M2201/38 , H04Q1/14 , H04Q1/446
摘要： A pair of unused telephone lines are connected together at a telephone office main frame by a device which is removably plugged in the main frame to connect a diode between said lines. At a point remote from the central office a testing circuit, which comprises a battery in series with a tone emitter, is releasably connected across the lines first with one polarity with respect to the lines, and then with the opposite polarity. If a tone is emitted for only one connection but not the other, the lines should be in working order.
摘要翻译：一对未使用的电话线通过可移除地插入主框架中的装置在电话局主框架处连接在一起，以在所述线路之间连接二极管。在远离中心局的点上，包括与音调发射器串联的电池的测试电路首先以相对于线路的一个极性首先可释放地连接，然后以相反的极性可释放地连接。如果只发出一个连接而不是另一个连接的音调，那么这些线应该是正常的。

9. 发明授权

US4792985A Transmitters and systems for tone-in-band transmission 失效
标题翻译：用于带内传输的发射机和系统
公开(公告)号：US4792985A
公开(公告)日：1988-12-20
申请号：US798801
申请日：1985-11-15
申请人： Joseph P. McGeehan , Andrew Bateman
发明人： Joseph P. McGeehan , Andrew Bateman
IPC分类号： H04Q1/446 , H04B1/76
CPC分类号： H04Q1/446
摘要： In those transparent tone-in-band systems which employ a single oscillator in the transmitter to generate a frequency notch between upper and lower portions of a band which is to be transmitted, there is not complete freedom to choose the width of the notch. In the present invention which also uses a single transmitter oscillator, one portion of the band transmitted is selected using a filter. A mixer is used to change the frequency of the input band in a way which does not allow the lower sideband to "fold" back at zero frequency and interfere with the lower transmitted portion. A further filter selects the other portion for transmission from the output of the mixer.
摘要翻译：在那些在发射机中采用单个振荡器在透射频带的上部和下部之间产生频率陷波的那些透明带内系统中，缺少选择宽度的完全自由度。在也使用单个发射机振荡器的本发明中，使用滤波器来选择发射的频带的一部分。混频器用于以不允许下边带在零频率“折回”并干扰下部发射部分的方式改变输入频带的频率。另一个滤波器从混频器的输出中选择其他部分进行传输。

10. 发明授权

US3519758A Feed-in method for signalling frequencies 失效
标题翻译：用于信号频率的馈入方法
公开(公告)号：US3519758A
公开(公告)日：1970-07-07
申请号：US63417367
申请日：1967-04-27
申请人： INT STANDARD ELECTRIC CORP
发明人： GFELLER HANS PETER ALBERT
IPC分类号： H04Q1/446 , H04Q9/12
CPC分类号： H04Q1/446

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