Patent ID: 7580629
Filing Date: 2009-08-25
Classification: H04B,H04J

Abstract:
1. An optical repeater for receiving an optical signal from an upstream node and for transmitting a regenerated copy of the received optical signal to a downstream node, the repeater comprising: an optical to electrical converter for generating an electrical domain signal in accordance with the received optical signal; a clock recovery device for recovering a clocking signal from the electrical domain signal; a framer for reframing the electrical domain signal in accordance with input and output domain clocking signals; an electrical to optical converter for converting the reframed electrical domain signal into an optical signal, and for transmitting the optical converted signal for a downstream node; a local clock for generating a local clocking signal; a beat detector having a switch for providing the framer with one of the recovered clocking signal and the local clocking signal as the input domain clocking signal in accordance with the signal indicative of drift.