Patent ID: 7570673
Filing Date: 2009-08-04
Classification: H04J

Abstract:
1. An ADM (Add Drop Multiplexing) device which is capable of performing LCAS (Link Capacity Adjustment Scheme) functions, configures a first communication network, and is connected to another ADM device which is connected to a second communication network, the ADM device comprising: a SONET or SDH interface to connect to the other ADM device by SONET or SDH connection; an H4 byte monitoring unit to monitor a H4 byte of POH (Path Over Head) in the SONET or SDH interface; a control information analysis unit to determine whether the ADM device itself is an ADM device which performs relay or an ending point ADM device based on information indicating the ending point ADM device included in LCAS (Link Capacity Adjustment Scheme) control information within the H4 byte; an LCAS control information transmission unit to transmit LCAS control information to the other ADM devices when the device itself is determined to be the ADM device which performs relay by the control information analysis unit.