Patent ID: 7609728
Filing Date: 2009-10-27
Classification: H04J,H04L

Abstract:
1. An optical transmission switching device in a multiplex communication system, comprising: a replaceable optical module that performs photoelectric conversion or electric-optic conversion on inputted data; a CDR (Clock and Data Recovery) circuit being provided in correspondence with the data from the replaceable optical module for reproducing data and clock at a timing according to a set rate; a device information judging circuit that judges device information of the replaceable optical module through reading out type information, that is, information about the types of interface of the replaceable optical module and a transmission code in the interface, and that sets a rate of the CDR circuit through discriminating an interface rate; and a branching circuit that receives the data output by the CDR circuit and that outputs the data output by the CDR circuit onto at least two separate paths, wherein the device information judging circuit is provided on an output side of the branching circuit and wherein the replaceable optical module is provided on an input side of the branching circuit, the type information being read by the device information judging circuit from a register provided within the replaceable optical module that stores the type information, wherein the rate of the CDR circuit is set through recovering a clock from the data output by the CDR circuit.