An alignment logic together with an MFI extractor are adapted to compensate for differential delays. The MFI extractor extracts the MFI disposed in the path overhead of each constituent time-slot. The alignment logic uses the extracted MFI to align corresponding data words (i.e., data words that are...http://www.google.com.tw/patents/US7415048?utm_source=gb-gplus-share專利 US7415048 - Differential delay compensation