公开(公告)号：US06052412A

公开(公告)日：2000-04-18

申请号：US326355

申请日：1999-06-04

申请人： Peter Gade Ruether ,  Carolyn Gaye Ford

发明人： Peter Gade Ruether ,  Carolyn Gaye Ford

IPC分类号： H04B14/04 ,  H04L25/49 ,  H03H7/30

CPC分类号： H04L25/4927 ,  H04B14/04

摘要： A codec supports PCM modem communications (e.g., V.90, X2, or K56flex protocols) over a universal digital loop carrier (UDLC) having an analog interface to the central office (CO). The codec includes an analog-to-digital converter (ADC) that is synchronized to the CO clock, and an equalizer that has been trained to provide a transfer function to compensate for the distortion introduced by the CO line interface reconstruction filter and connecting circuits, to minimize resampling error. These features allow the codec to output a PCM stream that accurately reproduces the PCM data at the central office, at data rates sufficient to support PCM modem communications, as well as voice and conventional modem communications. The equalizer can be trained using a remote training unit that transmits a predetermined sequence of training signals to the equalizer. The connection to the training unit can be over a local central office telephone call or over a wide area network that can be accessed through a switched connection. In one embodiment, the equalizer comprises a feed-forward linear equalizer followed by a decision feedback equalizer.

摘要翻译： 编解码器通过具有到中心局（CO）的模拟接口的通用数字环路载波（UDLC）来支持PCM调制解调器通信（例如，V.90，X2或K56flex协议）。 编解码器包括与CO时钟同步的模数转换器（ADC），以及经过训练以提供传输函数以补偿由CO线路接口重构滤波器和连接电路引入的失真的均衡器， 以最小化重采样误差。 这些功能允许编解码器输出PCM流，该PCM流在中央局准确地再现PCM数据，数据速率足以支持PCM调制解调器通信以及语音和常规调制解调器通信。 可以使用将训练信号的预定序列发送到均衡器的远程训练单元来训练均衡器。 与训练单元的连接可以通过本地中心局电话呼叫或通过可通过交换连接访问的广域网络。 在一个实施例中，均衡器包括前馈线性均衡器，随后是判决反馈均衡器。

公开(公告)号：US07953210B2

公开(公告)日：2011-05-31

申请号：US11475666

申请日：2006-06-27

申请人： Joseph Marcus Elder ,  Peter Gade Ruether

发明人： Joseph Marcus Elder ,  Peter Gade Ruether

IPC分类号： H04M11/00

CPC分类号： H04M11/04 ,  H04M11/007

摘要： A switch proxy comprising a controller, a translations database and a switching fabric are connected to a trunk group between a remote terminal and its controlling local switching system. The switch proxy monitors control and alarm signals to and from the switching system on the trunk. In the event of loss of control signals from the host switching system, the switch proxy intercepts requests for service, etc. from a calling telephone connected to the remote terminal and performs a look up in the translation database. If the call can be completed without the controlling switching system the call is looped back to the remote terminal. The translation database is maintained by a switch proxy management system that receives change orders from the local exchange carrier. The switch proxy management system forwards relevant changes to the switch proxy's translation database in the field.

摘要翻译： 包括控制器，转换数据库和交换结构的交换机代理连接到远程终端与其控制本地交换系统之间的中继组。 交换机代理监控来自总线上的交换系统的控制和报警信号。 在从主机交换系统丢失控制信号的情况下，交换机代理从连接到远程终端的主叫电话机拦截服务请求等，并在翻译数据库中进行查询。 如果在没有控制交换系统的情况下可以完成呼叫，则将呼叫环回到远程终端。 翻译数据库由交换机​​代理管理系统维护，该系统从本地交换运营商接收更改订单。 交换机代理管理系统将相关更改转发到现场的交换机代理的翻译数据库。

公开(公告)号：US6151364A

公开(公告)日：2000-11-21

申请号：US183709

申请日：1998-10-30

申请人： Peter Gade Ruether ,  Carolyn Gaye Ford

发明人： Peter Gade Ruether ,  Carolyn Gaye Ford

IPC分类号： H04B14/04 ,  H04L25/49 ,  H04B1/38 ,  H04L5/14

CPC分类号： H04B14/04 ,  H04L25/4927

摘要： A codec supports PCM modem communications (e.g., V.90, X2, or K56flex protocols) over a universal digital loop carrier (UDLC) having an analog interface to the central office (CO). The codec includes an analog-to-digital converter (ADC) that is synchronized to the CO clock, and an equalizer that has been trained to provide a transfer function to compensate for the distortion introduced by the CO line interface reconstruction filter and connecting circuits, to minimize resampling error. The features allow the codec to output a PCM stream that accurately reproduces the PCM data at the central office, at data rates sufficient to support PCM modem communications, as well as voice and conventional modem communications.

摘要翻译： 编解码器通过具有到中心局（CO）的模拟接口的通用数字环路载波（UDLC）来支持PCM调制解调器通信（例如，V.90，X2或K56flex协议）。 编解码器包括与CO时钟同步的模数转换器（ADC），以及经过训练以提供传输函数以补偿由CO线路接口重构滤波器和连接电路引入的失真的均衡器， 以最小化重采样误差。 这些特征允许编解码器输出PCM流，该PCM流在中央局准确再现PCM数据，数据速率足以支持PCM调制解调器通信，以及语音和常规调制解调器通信。