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Abstract

A method is disclosed for transmitting super-rate data signals having a bit-rate higher than a predetermined bit-rate through a digital data transmission system normally providing channels having the predetermined bit-rate. The channels are subject to different propagation delay characteristics through the system. The method, comprises allocating a group of k channels in the data transmission system as a virtual channel for the transmission of the super-rate signals; dividing the super-rate signals into n sub-signals, where n.ltoreq.k, having a bit-rate equal to or less than the predetermined bit-rate; generating delay calibration signals for transmission through the data transmission system; defining an overhead channel in at least one of the channels; transmitting the n sub-signals over the channels; transmitting the delay calibration signals in a rotational pattern over the channels in slots normally containing data signals, the delay calibration signals temporarily displacing the data signals normally occupying the slots; transmitting the displaced data signals over the overhead channel in slots normally occupied by the delay calibration signals displacing them; and reassembling the n sub-signals to reconstitute the original super-rate data signals with the aid of the delay calibration signals after transmission through the channels.

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First Claim