FIELD: digital communication equipment, in particular, cellular communication networks using extended spectrum communication channels. SUBSTANCE: method involves receiving test sequence of digital data transmitted through channel by receiving station, which also generates copy of test sequence of digital data. Precision of information transmission through communication channel is detected by comparison of copy of test data sequence received through communication channel. Invention provides possibility to transmit test sequence of digital data at single rate from set of possible data transmission rates, while receiving station provides identification of data transmission rate with respect to each test sequence of digital data. To model transmission of, for example, voice data system may be configured so that each test sequence of digital data is generated according to pseudorandom process. EFFECT: quantitative estimation of quality of communication channels in digital communication system. 28 cl, 3 dwg, 6 tbl
