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

Claim 6:
7. A communication method executed by a communication device including a first transmission-reception unit, a second transmission-reception unit, and a control unit, the first transmission-reception unit being connected with a first optical line terminal, the second transmission-reception unit being connected with a second optical line terminal replaceable with a third optical line terminal, the communication method comprising:
a step of acquiring, by the first transmission-reception unit, a control signal having a destination at the second or third optical line terminal from the first optical line terminal;
a step of forwarding, by the control unit, 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
a step of forwarding, by the second transmission-reception unit, the control signal to the second or third optical line terminal,, or the communication method comprising:
a step of acquiring, by the second transmission-reception unit, a control signal having a destination at the first optical line terminal from the second or third optical line terminal;
a step of forwarding, by the control unit, 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
a step of forwarding, by the first transmission-reception unit, the control signal to the first optical line terminal.