Abstract: Method for transmitting a unique high-rate digital data flow over n multiple different independent digital communication channels between two different primary terminal adapters. The method involves the steps of establishing, on request of a first DTE to a second remote DTE, a set of n independent digital communication channels between said terminal adapters and determining, during an initialization phase, the relationship between the slot of each channel used for the building of an aggregation superchannel and the chronologic order of the establishment of the considered slot. Then, the high-rate digital data flow is separated into bytes and each byte is transmitted through the independent digital channels in accordance with the chronologic order which was previously assigned to each of the said channels.