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https://www.electronicdesign.com/technologies/communications/article/21764039/octal-e1-digital-signal-interface-solves-sdh-wander-problem Octal E1 Digital Signal Interface Solves SDH Wander Problem | Electronic Design Offering full E1 CRC-4 monitoring in transmit and receive directions, SXT6282 octal E1 digital signal interface can be programmed on the transmit side as a... digital signal interfaceoctale1