Destuffing control by modifying detected pointer with...

Details Destuffing control by modifying detected pointer with... Destuffing control by modifying detected pointer with...

H - Electricity

04

L

H04L 7/00 (2006.01) H01J 3/07 (2006.01) H04J 3/07 (2006.01)

Patent

CA 2066971

In a digital communication system where a received stuff-synchronized TDM signal is demultiplexed into data signals each containing a sequence of frames. Each frame contains a pointer to indicate the start timing of the frame and specify positive, negative or zero destuffing. A pointer is detected from each data signal and compared with a previous pointer of the data signal stored in a memory. From this comparison the type of destuffing to be performed on a frame is determined, and in response to it, +1, -1 or 0 is added to the previous pointer to produce a current pointer, which is then used to rewrite the previous point. A binary clock count value is generated by a single phase counter and compared with the current pointer to generate a start-of-frame signal if it equals the current value.

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