公开(公告)号：US07412221B2

公开(公告)日：2008-08-12

申请号：US11092241

申请日：2005-03-29

申请人： Ravindran Mohanavelu ,  Aaron K. Martin ,  William Dawson Kesling

发明人： Ravindran Mohanavelu ,  Aaron K. Martin ,  William Dawson Kesling

IPC分类号： H04B1/10 ,  H04M1/76 ,  H03K17/16

CPC分类号： H04B3/32

摘要： A data driver drives a data signal on a channel, and a current mode driver drives a varying current on the channel to reduce crosstalk.

摘要翻译： 数据驱动器驱动通道上的数据信号，并且当前模式驱动器驱动通道上的变化电流以减少串扰。

公开(公告)号：US07336944B2

公开(公告)日：2008-02-26

申请号：US10609222

申请日：2003-06-27

申请人： Donna Michaels Sand ,  John Gerard Adamek

发明人： Donna Michaels Sand ,  John Gerard Adamek

IPC分类号： H04M1/76 ,  H04M7/00 ,  H04M9/00

CPC分类号： H04M3/2281 ,  H04L63/302 ,  H04M3/42391 ,  H04M2207/18

摘要： A method and apparatus for legal intercept monitoring of a cellular telephone modem (CTM) device. More particularly, a system incorporating a CTM-to-TTY/TDD converter and a Call Content Delivery Unit (CCDU) to facilitate the monitoring of calls made to or from a CTM device is implemented.

摘要翻译： 一种用于蜂窝电话调制解调器（CTM）装置的合法拦截监视的方法和装置。 更具体地，实现了结合CTM到TTY / TDD转换器和呼叫内容传送单元（CCDU）的系统，以便于监视对CTM设备进行的呼叫的监视。

公开(公告)号：US20070258581A1

公开(公告)日：2007-11-08

申请号：US11702901

申请日：2007-02-06

申请人： Bernard Hammond

发明人： Bernard Hammond

IPC分类号： H04M1/76

CPC分类号： H04B3/32 ,  H01R13/518 ,  H01R13/6464 ,  H01R13/719

摘要： The present invention relates to methods and systems for minimizing alien crosstalk between connectors. Specifically, the methods and systems relate to isolation and compensation techniques for minimizing alien crosstalk between connectors for use with high-speed data cabling. A frame can be configured to receive a number of connectors. Shield structures may be positioned to isolate at least a subset of the connectors from one another. The connectors can be positioned to move at least a subset of the connectors away from alignment with a common plane. A signal compensator may be configured to adjust a data signal to compensate for alien crosstalk. The connectors are configured to efficiently and accurately propagate high-speed data signals by, among other functions, minimizing alien crosstalk.

公开(公告)号：US20060045258A1

公开(公告)日：2006-03-02

申请号：US11200314

申请日：2005-08-09

申请人： James Stiscia

发明人： James Stiscia

IPC分类号： H04M1/76

CPC分类号： H04M11/062 ,  H01R13/6463 ,  H01R13/6464 ,  H01R13/6473

摘要： Systems and methods for improving the quality of service associated with asymmetric digital subscriber line (ADSL) services are disclosed. Such improvements allow for the optimization of service levels and reliability in providing video and data services to subscribers, and in ensuring that such service levels remain acceptable as the number of subscribers on a given loop plant increase.

公开(公告)号：US06901143B1

公开(公告)日：2005-05-31

申请号：US09228894

申请日：1999-01-11

申请人： Yoshihiro Ono

发明人： Yoshihiro Ono

IPC分类号： H04M1/60 ,  H04M9/08 ,  H04M1/76 ,  H04M7/00 ,  H04M9/00

CPC分类号： H04M9/082 ,  H04M1/6025

摘要： In a voice switch, a received voice signal and a transmitted voice signal are inputted to a receiving side control section, the receiving side control section thereby produces a signal for controlling an amount of attenuation in a receiving side attenuation section. As a result, the receiving side attenuation section attenuates the received voice signal by a predetermined amount to produce a speaker output voice signal for driving a speaker. A speaker output voice signal and a microphone input voice signal are inputted to a transmitting side control section, the transmitting side control section thereby produces a signal for controlling an amount of attenuation in a transmitting side attenuation section. Consequently, the transmitting side attenuation section attenuates the speaker output voice signal by a predetermined amount to produce the transmitted voice signal.

摘要翻译： 在语音切换中，将接收的语音信号和发送的语音信号输入到接收侧控制部，接收侧控制部由此产生用于控制接收侧衰减部的衰减量的信号。 结果，接收侧衰减部分将接收到的语音信号衰减预定量，以产生用于驱动扬声器的扬声器输出语音信号。 扬声器输出语音信号和麦克风输入语音信号被输入到发送侧控制部分，发送侧控制部分由此产生用于控制发送侧衰减部分的衰减量的信号。 因此，发送侧衰减部分将扬声器输出语音信号衰减预定量以产生发送的语音信号。

公开(公告)号：US06853724B2

公开(公告)日：2005-02-08

申请号：US10119485

申请日：2002-04-10

申请人： Jie Dong Wang

发明人： Jie Dong Wang

IPC分类号： H04M1/76 ,  H04M1/00 ,  H04M9/00

CPC分类号： H04M1/76

摘要： Cascade low-pass filters are useful in attenuating the xDSL band in a POTS splitter. The design of the low-pass filter is a sixth-order filter having two stages. A first stage includes a fourth-order filter, preferably with a stop-band frequency of approximately 48 kHz. A second stage includes a second-order filter in cascade with the fourth-order filter. For this filter, the stop-band frequency is preferably approximately 29 kHz. The inductance value of the second stage is relatively small in comparison to the inductance values of the first stage. In this manner, improvements in xDSL band attenuation are facilitated with little or no eroding of the voice band performance such as insertion loss, pass-band attenuation and return loss.

摘要翻译： 级联低通滤波器可用于衰减POTS分离器中的xDSL频带。 低通滤波器的设计是具有两级的六阶滤波器。 第一级包括四级滤波器，优选具有约48kHz的阻带频率。 第二级包括与四阶滤波器级联的二阶滤波器。 对于该滤波器，阻带频率优选为大约29kHz。 与第一级的电感值相比，第二级的电感值相对较小。 以这种方式，通过很少或没有侵扰诸如插入损耗，通带衰减和回波损耗的语音带性能来促进xDSL频带衰减的改进。

公开(公告)号：US06839429B1

公开(公告)日：2005-01-04

申请号：US09266413

申请日：1999-03-10

申请人： Rohit V. Gaikwad ,  Richard G. Baraniuk

发明人： Rohit V. Gaikwad ,  Richard G. Baraniuk

IPC分类号： H04L5/14 ,  H04L27/00 ,  H04L27/26 ,  H04M1/76 ,  H04M7/00 ,  H04M9/00

CPC分类号： H04L5/14 ,  H04L27/00 ,  H04L27/2608 ,  H04L27/2614

摘要： System and methods for determining an optimized transmit spectra (spectral distributions of transmission power) for a set of communications channels that experience cross-talk among themselves and for transmitting data on the channels. The transmit spectra are preferably constructed so that largely contiguous frequency bands are allocated to each signaling direction (upstream/downstream) on each communications channel and/or to each channel in the set of channels. In one embodiment, each communications channel is restricted to a maximum time-averaged power. The method preferably includes steps of determining the channel transfer functions of the communications channel, determining interference characteristics of the channels, calculating substantially optimal transmit spectra for the communications channels, and redistributing the frequency bins so that they are contiguously grouped in each transmit spectra. The contiguous groupings allow wider frequency bands for signaling in the channel. In one embodiment, the channel is limited by a “peak-power constraint.”

公开(公告)号：US6144735A

公开(公告)日：2000-11-07

申请号：US083162

申请日：1998-05-22

申请人： Gregory L. Bella

发明人： Gregory L. Bella

IPC分类号： H04L27/00 ,  H04M1/738 ,  H04M1/76 ,  H04M11/06 ,  H04M1/00 ,  H04M11/00

CPC分类号： H04L27/0002 ,  H04M1/738 ,  H04M1/76 ,  H04M11/062

摘要： A dual-mode filter network for an Asymmetric Digital Subscriber Line (ADSL) has a first frequency response when the Plain Old Telephone Service (POTS) telephone is on-hook and has a second frequency response when the POTS telephone is off-hook. A detector is used to determine the on-hook/off-hook status. The dual-mode filter network may be situated at the central unit and connected to a Public Switched Telephone Network (PSTN) while the detector at the remote unit connected between the POTS low pass filter and the POTS telephone. In such case, the detector outputs a signal which is transmitter via the twisted pair on an overhead channel. Alternatively, the dual-mode filter and the detector may be co-located at either the central unit or at the remote unit. Regardless of where it, or the detector are located, the dual-mode filter network has at least different combinations of components which are activated, depending on the on-hook/off-hook status of the POTS phone.

摘要翻译： 当普通电话服务（POTS）电话挂机并且当POTS电话摘机时具有第二频率响应时，用于非对称数字用户线路（ADSL）的双模式滤波器网络具有第一频率响应。 检测器用于确定挂机/摘机状态。 双模滤波器网络可以位于中央单元处并且连接到公共交换电话网（PSTN），而远程单元处的检测器连接在POTS低通滤波器和POTS电话之间。 在这种情况下，检测器通过架空通道上的双绞线输出作为发射机的信号。 或者，双模式滤波器和检测器可以位于中央单元或远程单元处。 取决于POTS电话的挂机/摘机状态，无论其在哪里或检测器位于何处，双模式滤波器网络至少具有不同组合的组件被激活。

公开(公告)号：US6115466A

公开(公告)日：2000-09-05

申请号：US38938

申请日：1998-03-12

申请人： Gregory L. Bella

发明人： Gregory L. Bella

IPC分类号： H04L27/00 ,  H04M1/738 ,  H04M1/76 ,  H04M11/06 ,  H04M1/00

CPC分类号： H04M1/738 ,  H04L27/0002 ,  H04M1/76 ,  H04M11/062

摘要： A dual-mode filter network for an Asymmetric Digital Subscriber Line (ADSL) has a first frequency response when the Plain Old Telephone Service (POTS) telephone is on-hook and has a second frequency response when the POTS telephone is off-hook. A detector is used to determine the on-hook/off-hook status. The dual-mode filter network may be situated at the central unit and connected to a Public Switched Telephone Network (PSTN) while the detector at the re-mote unit connected between the POTS low pass filter and the POTS telephone. In such case, the detector outputs a signal which is transmitter via the twisted pair on an overhead channel. Alternatively, the dual-mode filter and the detector may be co-located at either the central unit or at the remote unit. Regardless of where it, or the detector are located, the dual-mode filter network has at least different combinations of components which are activated, depending on the on-hook/off-hook status of the POTS phone.

摘要翻译： 当普通电话服务（POTS）电话挂机并且当POTS电话摘机时具有第二频率响应时，用于非对称数字用户线路（ADSL）的双模式滤波器网络具有第一频率响应。 检测器用于确定挂机/摘机状态。 双模式滤波器网络可以位于中央单元处，并且连接到公共交换电话网（PSTN），而连接在POTS低通滤波器和POTS电话之间的重新安装单元处的检测器。 在这种情况下，检测器通过架空通道上的双绞线输出作为发射机的信号。 或者，双模式滤波器和检测器可以位于中央单元或远程单元处。 取决于POTS电话的挂机/摘机状态，无论其在哪里或检测器位于何处，双模式滤波器网络至少具有不同组合的组件被激活。

公开(公告)号：US5970139A

公开(公告)日：1999-10-19

申请号：US781270

申请日：1997-01-10

申请人： Roger L. Koenig ,  Thomas Bullington ,  Phillip Clark

发明人： Roger L. Koenig ,  Thomas Bullington ,  Phillip Clark

IPC分类号： H04M3/00 ,  H04M7/00 ,  H04M19/00 ,  H04M19/02 ,  H04M1/76 ,  G05F1/12

CPC分类号： H04M7/0096 ,  H04M19/005 ,  H04M19/02 ,  H04M3/005

摘要： A technique for powering telephone lines using an unbalance current source and current sink; and a technique for improving attenuation/frequency distribution and return loss (impedance matching) of transformer-coupled wire-line communications circuits by using secondary series capacitance and an AC current pump signal source; and a generation of ringing voltage as positive voltage pulses with respect to a negative power supply voltage; and a technique for removal of AC power ripple by using an active linear floating filter for the purpose of powering telephone line circuits, and a technique for injection of real time tone samples into T1 transmissions circuits by use of a T1 framer idle code register.The combination of the above five circuit techniques provides for the hardware implementation of a single printed circuit board embodiment (Line Interface Unit LIU) of a plurality of communications functions including a T1 channel service unit, a ringing generator, power converters, a ringback tone generator, and a channel bank controller. The LIU supports selectable T1 standards of communications. Dual 12-channel telephone line voice cards plug into the LIU card to provide a complete T1 channel bank control process and apparatus. The invention solves telephone line interface, power filtering, ringing generation, and tone injection problems with lower component complexity, costs, and physical size than prior art solutions.

摘要翻译： 使用不平衡电流源和电流接收器为电话线供电的技术; 以及通过使用次级串联电容和交流电流泵浦信号源来改善变压器耦合有线通信电路的衰减/频率分布和回波损耗（阻抗匹配）的技术; 并产生相对于负电源电压的正电压脉冲的振铃电压; 以及通过使用用于为电话线路电路供电的有源线性浮动滤波器来消除AC电力纹波的技术，以及通过使用T1成帧器空闲码寄存器将实时音调样本注入到T1传输电路中的技术。 上述五种电路技术的组合提供了包括T1信道服务单元，振铃发生器，功率转换器，回铃音发生器的多个通信功能的单个印刷电路板实施例（线路接口单元LIU）的硬件实现 ，以及频道银行控制器。 LIU支持可选择的T1通信标准。 双路12通道电话线路语音卡插入LIU卡，提供完整的T1通道银行控制流程和设备。 本发明解决了电话线路接口，功率滤波，振铃发生和色调注入问题，其具有比现有技术解决方案更低的组件复杂性，成本和物理尺寸。