Patent ID: 11888524
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication device comprising:
a first transmission-reception unit connected with a first optical line terminal;
a second transmission-reception unit being connected with a second optical line terminal replaceable with a third optical line terminal; and
a control unit, wherein the communication device executes any of processing in which
the first transmission-reception unit acquires a control signal having a destination at the second or third optical line terminal from the first optical line terminal,
the control unit forwards the control signal toward the second transmission-reception unit connected with the second or third optical line terminal, where the second transmission-reception unit to which a virtual local area network (VLAN) is same as a VLAN allocated to the first transmission-reception unit having acquired the control signal is allocated, and
the second transmission-reception unit forwards the control signal toward the second or third optical line terminal, and, processing in which
the second transmission-reception unit acquires a control signal having a destination at the first optical line terminal from the second or third optical line terminal,
the control unit forwards the control signal toward the first transmission-reception unit connected with the first optical line terminal, where the first transmission-reception unit to which a VLAN is same as a VLAN allocated to the second transmission-reception unit having acquired the control signal is allocated, and
the first transmission-reception unit forwards the control signal toward the first optical line terminal.