Universities teaching Communication Technology are certain to benefit from applications of the BSC-M Model, for the first time facilitating the evaluation of transmission procedures and codes. This book is also written for those interested in in development and testing of link control protocols and error protection schemes for communication systems. The content is thereby intended to offer a full set of calculations of error structures occurring within binary channels with memory (BSC-M). For this purpose it is not necessary to measure error structures.The model contains only two parameters, the bundling factor and the bit error rate, whereby the most diverse range of channels can be presented, derived from empirical readings conducted over twenty-three years, It have been verified by different Authors, as well as by measurements over cable and also over maritime radio up to distances of 7,500 km (short-wave).