Patent ID: 8194704
Filing Date: 2012-06-05
Classification: H04J

Abstract:
1. A network equipment comprising: at least one first circuit, electrically coupled to an SDH (Synchronous Digital Hierarchy) link or SONET (Synchronous Optical NETwork) link, extracting and outputting a first line clock synchronized with a received signal; at least one second circuit, electrically coupled to an Ethernet link, extracting a second line clock synchronized with a received signal and converting the second line clock into a clock of a frequency of the first line clock to be outputted; and a third circuit receiving the clocks of the frequency of the first line clock from the first and the second circuits, selecting among the clocks a clock of the best quality and outputting an equipment clock synchronized with the clock selected; wherein the first circuit outputs a transmission signal synchronized with the equipment clock and the second circuit converts the equipment clock into a clock of a frequency of the second line clock to output a transmission signal synchronized with the clock converted.