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    • 3. 发明申请
    • Methods, systems, and computer program products for substitution of card-based telephony bearer channel switch modules in a manner that preserves stable calls
    • 用于以保持稳定呼叫的方式替代基于卡的电话承载信道交换机模块的方法,系统和计算机程序产品
    • US20060092831A1
    • 2006-05-04
    • US11263649
    • 2005-10-31
    • Thomas HartnettPaul Richards
    • Thomas HartnettPaul Richards
    • H04J3/14
    • H04Q1/10H04J3/14H04M3/005H04M3/12H04Q1/028H04Q2213/13003H04Q2213/13109H04Q2213/13167H04Q2213/1338
    • Methods, systems, and computer program products for substitution of card-based telephony bearer channel switch modules in a manner that preserves stable calls are disclosed. According to one method, a first card-based telephony bearer channel switch module of a plurality of card-based telephony bearer channel switch modules is designated as a substitution switch module. A second card-based telephony bearer channel switch module of the plurality of card-based telephony bearer channel switch module is designated as an active switch module. Stable calls are established using the second card-based telephony bearer channel switch module. Configuration information for the second card-based telephony bearer channel switch module is communicated to the first card-based telephony bearer channel switch module. Call state information for calls involving the second card-based telephony bearer channel switch module is obtained from the first card-based telephony bearer channel switch modules. In response to detecting failure of the active switch module, the first card-based telephony bearer channel switch module is switched, using the configuration and call state information, to operate as the second card-based telephony bearer channel switch module in a manner that maintains the stable calls.
    • 公开了以保持稳定呼叫的方式代替基于卡的电话承载信道交换机模块的方法,系统和计算机程序产品。 根据一种方法,将多个基于卡的电话承载信道交换机模块的第一基于卡的电话承载信道交换模块指定为替换交换模块。 多个基于卡的电话承载信道切换模块的第二卡片式电话承载信道切换模块被指定为主动交换机模块。 使用第二基于卡的电话承载信道交换模块建立稳定的呼叫。 第二基于卡的电话承载信道交换模块的配置信息被传送到第一基于卡的电话承载信道交换模块。 从第一基于卡的电话承载信道交换模块获得涉及第二基于卡的电话承载信道交换模块的呼叫的呼叫状态信息。 响应于检测到主动交换机模块的故障,使用配置和呼叫状态信息来切换第一基于卡的电话承载信道交换模块作为第二基于卡的电话承载信道交换模块以维持 稳定的通话。
    • 4. 发明授权
    • Method and apparatus for synchronizing data transmission and reception over a network
    • 用于通过网络同步数据发送和接收的方法和装置
    • US06754295B1
    • 2004-06-22
    • US09545375
    • 2000-04-07
    • Thomas Hartnett
    • Thomas Hartnett
    • H04L700
    • H04J3/062H03L7/18
    • In one embodiment, the invention is directed to methods and system for converting an analog signal to digital samples for transmission over a communication network, and for converting digital samples received over a communication network to an analog signal. According to one feature, the system of the invention generates encoding and decoding master clocks from local oscillators, thus enabling the system of the invention to operate in environments where reliable timing signal are not available from the communication network. According to another feature, the system of the invention adjusts the frequencies of the encoding and decoding master clocks based on a connect rate to the communication network. In a further feature, the system of the invention employs encoding and decoding buffers for buffering the digital samples between a modem or a digital network access device, and signal converters to maintain a defined time relationship between digital samples being transferred between the modem or the digital network access device and the signal converters.
    • 在一个实施例中,本发明涉及用于将模拟信号转换为数字样本以用于通过通信网络进行传输以及将通过通信网络接收的数字样本转换为模拟信号的方法和系统。 根据本发明的一个特征,本发明的系统生成来自本地振荡器的主时钟的编码和解码,从而使得本发明的系统在可靠的定时信号不能从通信网络获得的环境中工作。 根据另一特征,本发明的系统基于与通信网络的连接速率来调整主时钟编码和解码的频率。 在另一个特征中,本发明的系统采用编码和解码缓冲器来缓冲调制解调器或数字网络接入设备之间的数字样本,以及信号转换器,以维持在调制解调器或数字 网络接入设备和信号转换器。