Patent ID: 7983149

Claim:
A line accommodation device, comprising: at least one first communication controller to control information transmission and reception to and from a first communication system, such as at least one of a synchronous optical network, a synchronous digital hierarchy and a wavelength division multiplexing; at least one second communication controller such as resilient packet ring station, to control the transmission and reception of information to or from a second communication system such as a resilient packet ring network using the first communication system as a communication medium; and route controller to control the switching of an information transfer route between the first communication controller and the second communication controller, wherein a plurality of the second communication systems are built on the first communication system and a plurality of said second communication controller belonging to the same or different second communication systems is installed in each of the line accommodation device, each of said second communication controllers comprises a memory to store identifying information attached to each of the second communication systems, and control logic to identify the second communication system, using the identifying information, and said route controller switches the information transfer route by adding a new second communication controller between said first communication controller, and disconnecting said second communication controller which formed the information transfer route between said first communication controller, wherein said new second communication controller is different from the second communication controller which formed the information transfer route with the first communication controller.