公开(公告)号：US06356560B1

公开(公告)日：2002-03-12

申请号：US09088461

申请日：1998-06-01

申请人： W. Stuart Venters ,  Wade S. Schofield ,  Philip David Williams

发明人： W. Stuart Venters ,  Wade S. Schofield ,  Philip David Williams

IPC分类号： H04L1250

CPC分类号： H04L47/24 ,  H04L12/2854 ,  H04L41/046 ,  H04L47/12 ,  H04L47/16 ,  H04L47/50 ,  H04L47/52 ,  H04L47/56

摘要： An arbitration mechanism is distributed among channel units of a statistically multiplexed frame relay switching system serving a plurality of access lines, the cumulative bandwidth of which exceeds that of an aggregate data link over which data is to be transported. For each access line, an arbitration code is generated. This code includes a transmit request or start bit, a calculated multibit arbitration value based upon a combination of parameters, including queuing delay and the configuration and traffic rate of the line, and an address code that identifies the physical location of the respective channel unit. All arbitration codes are readable by each frame relay channel unit via a wire-ORed bus. A channel unit participating in an arbitration cycle compares the value of its arbitration code with those of the other participants. That channel unit whose arbitration code is uniquely the largest of all arbitration participants takes ownership of the aggregate data link, transmits data, and then releases the link.

摘要翻译： 仲裁机制分布在服务于多条接入线路的统计复用的帧中继交换系统的信道单元中，其累积带宽超过要在其上传送数据的聚合数据链路的累积带宽。 对于每个访问行，生成仲裁代码。 该代码包括发送请求或起始位，基于参数的组合的计算的多位仲裁值，包括排队延迟和线路的配置和业务速率以及标识各个信道单元的物理位置的地址码。 每个帧中继通道单元都可以通过有线总线读取所有仲裁代码。 参与仲裁周期的信道单元将其仲裁码的值与其他参与者的值进行比较。 仲裁代码唯一的仲裁代码是所有仲裁参与者中最大的通道单元获得了总数据链路的所有权，发送数据，然后释放链路。

公开(公告)号：US5959847A

公开(公告)日：1999-09-28

申请号：US753106

申请日：1996-11-20

申请人： Lonnie S. McMillian ,  Wade S. Schofield ,  Barry S. Smith

发明人： Lonnie S. McMillian ,  Wade S. Schofield ,  Barry S. Smith

IPC分类号： H05K1/14 ,  H05K3/00 ,  H05K7/18 ,  H05K7/14

CPC分类号： H05K7/186 ,  H05K1/14 ,  H05K3/0058

摘要： A composite circuit card architecture conforms with a prescribed form factor for installation in a card slot and connection to a backplane of a multiple circuit card-supporting housing. Only a portion of the card is comprised of printed wiring board material, while the remainder, where no printed circuit components are installed, is a support substrate formed of a material other than that of said printed wiring board. Also, a front panel portion is formed of the material other than that of the printed wiring board, such as plastic integrally molded with the support substrate, thereby significantly reducing the cost associated with the conventional approach of making the entire card from printed circuit board material. At one communication link, such as a ribbon cable, may be coupled between the printed wiring board and at least one input/output port at the front panel.

摘要翻译： 复合电路卡结构符合规定的外形尺寸，用于安装在卡插槽中并连接到多电路卡支撑外壳的背板。 只有一部分卡片由印刷线路板材料构成，而没有安装印刷电路部件的其余部分是由不同于所述印刷电路板的材料形成的支撑基板。 此外，前面板部分由除了印刷线路板的材料以外的材料形成，例如与支撑基板一体模制的塑料，从而显着降低与从印刷电路板材料制造整个卡的常规方法相关的成本 。 在诸如带状电缆的一个通信链路可以连接在印刷线路板与前面板上的至少一个输入/输出端口之间。

公开(公告)号：US06370152B1

公开(公告)日：2002-04-09

申请号：US09088159

申请日：1998-06-01

申请人： Wade S. Schofield ,  W. Stuart Venters ,  Philip David Williams

发明人： Wade S. Schofield ,  W. Stuart Venters ,  Philip David Williams

IPC分类号： H04J302

CPC分类号： H04L41/046

摘要： A simple network management protocol (SNMP) agent is distributed among individual channel units of frame relay switching system, rather than in a proxy device. The SNMP agent is implemented by encoding the identity of an individual channel device for whom a data packet is intended in the community data string portion of an SNMP packet. For a read request, the address of a channel unit is encoded as an augmented community string, such as “public.#”. For a write request, the address is encoded as an augmented community string, such as “private.#”.

摘要翻译： 简单的网络管理协议（SNMP）代理分布在帧中继交换系统的各个信道单元之间，而不是在代理设备中。 SNMP代理通过在SNMP分组的社区数据字符串部分中对要包含数据分组的单个信道设备的标识进行编码来实现。 对于读取请求，通道单元的地址被编码为扩充的社区字符串，例如“public。＃”。 对于写请求，地址被编码为扩充的社区字符串，例如“private”＃。

公开(公告)号：US06580254B2

公开(公告)日：2003-06-17

申请号：US09802400

申请日：2001-03-09

申请人： Wade S. Schofield

发明人： Wade S. Schofield

IPC分类号： G05F134

CPC分类号： H02J1/06 ,  H02J9/061 ,  H02J2001/002 ,  H04M19/08

摘要： An apparatus and method are disclosed for providing backup power over communication wires from a central office of a service provider to a remote customer premise. In accordance with the invention, a high voltage direct current (HVDC) power signal and a digital data signal are combined and coupled to the communication wires at the central office. The combined signal is then transmitted along the communication wires to the remote customer premise. At the customer premise, the HVDC power signal is separated from the digital data signal. The HVDC power signal is then down converted into a low voltage direct current (LVDC) power signal that is coupled to premise communication wires at the remote customer premise. The premise communication wires them provide a path for the data signal and the LVDC power signal to the customer premise equipment (CPE). Thus, a reliable and safe source of backup power is provided for the CPE over existing communications wires.

公开(公告)号：US06175508B1

公开(公告)日：2001-01-16

申请号：US09362016

申请日：1999-07-27

申请人： Lonnie S. McMillian ,  Wade S. Schofield ,  Barry S. Smith

发明人： Lonnie S. McMillian ,  Wade S. Schofield ,  Barry S. Smith

IPC分类号： H05K714

CPC分类号： H05K7/186 ,  H05K1/14 ,  H05K3/0058

摘要： A composite circuit card architecture conforms with a prescribed form factor for installation in a card slot and connection to a backplane of a multiple circuit card-supporting housing. Only a portion of the card is comprised of printed wiring board material, while the remainder, where no printed circuit components are installed, is a support substrate formed of a material other than that of said printed wiring board. Also, a front panel portion is formed of the material other than that of the printed wiring board, such as plastic integrally molded with the support substrate, thereby significantly reducing the cost associated with the conventional approach of making the entire card from printed circuit board material. At one communication link, such as a ribbon cable, may be coupled between the printed wiring board and at least one input/output port at the front panel.

摘要翻译： 复合电路卡结构符合规定的外形尺寸，用于安装在卡插槽中并连接到多电路卡支撑外壳的背板。 只有一部分卡片由印刷线路板材料构成，而没有安装印刷电路部件的其余部分是由不同于所述印刷电路板的材料形成的支撑基板。 此外，前面板部分由除了印刷线路板的材料以外的材料形成，例如与支撑基板一体模制的塑料，从而显着降低与从印刷电路板材料制造整个卡的常规方法相关的成本 。 在诸如带状电缆的一个通信链路可以连接在印刷线路板与前面板上的至少一个输入/输出端口之间。

公开(公告)号：US06466582B2

公开(公告)日：2002-10-15

申请号：US10022076

申请日：2001-12-17

申请人： W. Stuart Venters ,  Wade S. Schofield ,  Philip David Williams

发明人： W. Stuart Venters ,  Wade S. Schofield ,  Philip David Williams

IPC分类号： G01R3108

CPC分类号： H04L47/24 ,  H04L12/2854 ,  H04L41/046 ,  H04L47/12 ,  H04L47/16 ,  H04L47/50 ,  H04L47/52 ,  H04L47/56

摘要： An arbitration mechanism is distributed among channel units of a statistically multiplexed frame relay switching system serving a plurality of access lines, the cumulative bandwidth of which exceeds that of an aggregate data link over which data is to be transported. For each access line, an arbitration code is generated. This code includes a transmit request or start bit, a calculated multibit arbitration value based upon a combination of parameters, including queuing delay and the configuration and traffic rate of the line, and an address code that identifies the physical location of the respective channel unit. All arbitration codes are readable by each frame relay channel unit via a wire-ORed bus. A channel unit participating in an arbitration cycle compares the value of its arbitration code with those of the other participants. That channel unit whose arbitration code is uniquely the largest of all arbitration participants takes ownership of the aggregate data link, transmits data, and then releases the link.

公开(公告)号：US5822398A

公开(公告)日：1998-10-13

申请号：US558085

申请日：1995-11-13

申请人： Clifford L. Hall ,  Wade S. Schofield

发明人： Clifford L. Hall ,  Wade S. Schofield

IPC分类号： H04J3/14 ,  H04L1/24 ,  H04M1/24 ,  H04M3/08 ,  H04M3/22 ,  H04M3/24

CPC分类号： H04J3/14 ,  H04L1/24 ,  H04M3/244

摘要： A performance monitoring arrangement conducts auxiliary communications between a performance-monitoring capable line interface unit and one or more performance-monitoring capable channel units of a D4 channel bank without interrupting transmission of digital data to and from a customer premises. During each of an initialization mode and a performance-monitoring mode, the data communication format of a channel bank bus is modified to allow insertion of an auxiliary line interface unit-sourced command bit between selected bits of the data. During the performance-monitoring mode, the communication format of the channel bank link is further modified to provide for insertion of a response bit from a channel unit and the transmission of data at an increased data rate. In the absence of an indication that there is an anomaly that would impair the operation of the channel bank, the channel unit transitions to a performance-monitoring mode of operation. If either of the channel unit and line interface unit is not capable of conducting performance-monitoring communications with one another, and in the absence of an indication that there is an anomaly that would impair the operation of the channel bank, the channel unit transitions from the initialization state to a normal mode of operation.

摘要翻译： 性能监视装置在性能监视能力的线路接口单元与D4信道组的一个或多个具有性能监视能力的信道单元之间进行辅助通信，而不中断数字数据向和从客户驻地的传输。 在初始化模式和性能监视模式期间，修改通道库总线的数据通信格式，以允许在数据的选定位之间插入辅助线路接口单元来源的命令位。 在性能监视模式期间，进一步修改信道库链路的通信格式，以提供来自信道单元的响应位的插入和以增加的数据速率的数据传输。 在不存在会损害信道组的操作的异常的指示的情况下，信道单元转换到性能监视操作模式。 如果信道单元和线路接口单元中的任一个不能彼此进行性能监视通信，并且在没有指示存在将损害信道组的操作的异常的指示的情况下，信道单元从 初始化状态变为正常工作模式。