a-law meaning in English

a法则

The system is consist of the main data processing board which is based onthe fpga device and fast ethernet phyceiver rtl8201l and a - law pcm data encoder and decorder chip msm7702 - 3 , and the dial - up and display board which is based on mcu . the main board would carry out the core task of data processing , such as voice data packing and unpacking , the ethernet frame processing , protocol processing , call processing , etc . the dial - up and display board would carry out the task of display the ip address which is input by consumer and status of network during talk period from the main board , and so on . in the paper the system of lan ip telephone and the tcp / ip protocol is introduced firstly , then the fpga device is stated . after that the fpga - based hardware scheme is introduced in detail in chapter four
系统以altera公司的acex1k系列的fpga和快速以太网控制器rtl8201l和语音编解码芯片msm7702 - 3为核心构建了数据处理主板和以单片机为控制器的拨号显示子板组成。数据处理主板的核心任务，包括语音数据处理、以太网帧处理、协议处理、呼叫处理等。拨号显示子板则完成通话前的显示用户所拨过的ip地址，通话期间网络状态的显示等等。