A broadcastcommunication convergence system, and an FTTH system that can accommodate broadcast signals of various channels and variable band signals by converging broadcast and communication signals and transmitting the converged broadcast and communication signals using an IEEE 1394 transmission method serving as a standard interface in the FTTH system for broadcastcommunication convergence. An insulating spacer is disposed between the bodies for insulating them from each other. The method may further include sending, from the wireless node, a full channel quality indicator to a base station based on the first channel quality measurement. The relaxation agent may, for example, be dysprosium. The hoisting hook is then detached from the attachment portion and the detachable component is attached to the unit using the attachment portion. When the ACM restarts, instead of reentering all CAM entries into the CAM or reading the contents of the CAM, the ACM only updates the CAM with the entries that were modified while the ACM was offline, prior to restart.