A flexible wiring member, which is capable of being wound around a wire harness, is provided with joint-side terminals 14a, which are capable of being fitted with wire-side terminals, and the flexible wiring member includes a connection circuit for electrically connecting specified joint-side terminals in the joint-side terminals 14a. The ceramic waferboard includes an alignment feature configured to passively position an optical component. Also, the switchover from the default MDT to the data MDT does not happen until all egress routers have responded to the message.