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1. 发明授权

US06400708B1 D-channel voice communications 有权
标题翻译： D通道语音通信
公开(公告)号：US06400708B1
公开(公告)日：2002-06-04
申请号：US09161276
申请日：1998-09-28
申请人： Dale L. Bartholomew , Robert D. Farris , Raymond I. Millet , David D. Hunter
发明人： Dale L. Bartholomew , Robert D. Farris , Raymond I. Millet , David D. Hunter
IPC分类号： H04J312
CPC分类号： H04Q11/0442 , H04Q2213/13003 , H04Q2213/13034 , H04Q2213/13039 , H04Q2213/13093 , H04Q2213/13176 , H04Q2213/13202 , H04Q2213/13209 , H04Q2213/1329 , H04Q2213/13292 , H04Q2213/13389
摘要： A number of proposals have been developed to provide data communications over two-wire copper circuits at rates equivalent to a number of combined ISDN B-channels. For example, for an ISDN rate digital subscriber line (IDSL), the circuit between the network termination at the customer premises and the channel bank carries data on two combined B-channels. An IDSL circuit cannot carry voice communications. Some such services carry the lower rate signaling D-channel only on the subscriber line circuit. Normal ISDN services carry voice services on one of the two B-channels, limiting data communications to the other B-channel. Normal ISDN services do carry the lower rate D-channel through the network, but this channel is used only for call set-up signaling, low speed data communications and the like. The invention uses two or more B-channels on the DSL circuit for data communications and transports voice telephone communications on the low speed signaling D-channel. The bearer (B) channels typically connect to a high speed data network, such as SMDS, for services such as Internet access. The voice communications on the D-channel utilize in-band call set-up signaling and appropriate CODECs for digital communications compressed to the low D-channel rate. The channel bank includes a multiplexer/demultiplexer to combine four active D-channels voice communications into one DS0 for transport to a switch module, for example, in an end office telephone switch.
摘要翻译：已经开发了许多提议，以相当于多个组合的ISDN B信道的速率提供双线铜电路的数据通信。例如，对于ISDN速率数字用户线（IDSL），客户驻地的网络终端与信道组之间的电路在两个组合的B信道上传送数据。 IDSL电路不能携带语音通信。一些这样的服务仅在用户线路上携带较低速率的信令D信道。正常的ISDN业务在两个B信道中的一个上携带话音业务，将数据通信限制到另一个B信道。正常的ISDN业务通过网络承载较低速率的D信道，但是该信道仅用于呼叫建立信令，低速数据通信等。本发明在DSL电路上使用两个或多个B信道用于数据通信，并且在低速信令D信道上传输语音电话通信。承载（B）信道通常连接到高速数据网络，例如SMDS，用于诸如因特网接入的服务。 D信道上的语音通信利用带内呼叫建立信令和适用于压缩到低D信道速率的数字通信的编解码器。信道组包括多路复用器/解复用器，用于将四个有效的D信道语音通信组合成一个DS0，用于传输到交换机模块，例如终端电话交换机。

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