公开(公告)号：US5359709A

公开(公告)日：1994-10-25

申请号：US826504

申请日：1992-01-27

申请人： Alain Blanc ,  Sylvie Gohl-Roux ,  Gottfried Ungerboeck

发明人： Alain Blanc ,  Sylvie Gohl-Roux ,  Gottfried Ungerboeck

IPC分类号： H04L5/00 ,  H04L27/00 ,  H04L29/06 ,  H04L29/10 ,  G06F13/42

CPC分类号： H04L29/06 ,  H04L27/00

摘要： Multiple operating configurations in data circuit terminating equipment (DCE) are enabled through multiple queues stored in a random access memory and which are loaded with bits and characters coming either from data terminating equipment (DTE) or the telecommunications line. The DSP processor stores bits provided by a transmit circuit in a first queue, determines characters from the bits stored in the first queue based on a first transmission protocol and stores the characters in a second queue. A third queue is used by a control processor to store characters to be transmitted to a remote DCE. The DSP processor determines bits to be transmitted from the characters stored in a third queue based on a second transmission protocol, and stores those bits in a fourth queue. When the DCE is operating in a synchronous mode, the DSP processor determines PCM words for transmission based on the contents of the second queue and stores them in a fifth queue for transmission. Similarly, when the DCE switches to an asynchronous mode, the DSP processor determines PCM words based on the contents of the fourth queue and stores them in the fifth queue for transmission. A similar queue arrangement is provided for the receive circuitry of the DCE.

摘要翻译： 数据电路终端设备（DCE）中的多种操作配置通过存储在随机存取存储器中的多个队列启用，并且装载有来自数据终端设备（DTE）或电信线路的位和字符。 DSP处理器将由发送电路提供的位在第一队列中存储，基于第一传输协议从存储在第一队列中的比特确定字符，并将该字符存储在第二队列中。 控制处理器使用第三个队列来存储要发送到远程DCE的字符。 DSP处理器基于第二传输协议确定从存储在第三队列中的字符发送的比特，并将这些比特存储在第四队列中。 当DCE工作在同步模式时，DSP处理器根据第二个队列的内容来确定用于传输的PCM字，并将其存储在第五个队列中进行传输。 类似地，当DCE切换到异步模式时，DSP处理器基于第四队列的内容来确定PCM字，并将它们存储在第五队列中以进行传输。 为DCE的接收电路提供了类似的队列布置。