详细介绍了循环冗余校验CRC（Cyclic Redundancy Check）的差错控制原理及其算法实 现。-Details of Cyclic Redundancy Check CRC (Cyclic Redundancy Check) theory and the error control algorithm.

详细介绍了循环冗余校验 CRC（Cyclic Redundancy Check）的差错控制原理及其算法实 现。 -Details of the cyclic redundancy check CRC (Cyclic Redundancy Check) error control principle and algorithm.

PSTN modem中常用的V.42bis算法的CCITT官方标准文档-Standard document CCITT official V.42bis algorithm used in PSTN modem