A communication device including a registration unit that registers an IP address of the communication device and a method information including a first method information indicating a first setting method for setting a dynamic IP address and a second method information indicating a second setting method for setting a static IP address. The tool has breaking members that extend radially outwards and backwards from a nose such that, when the tool is pulled through an existing underground pipe, the breaking members are forced against the inside of the existing underground pipe, thereby breaking it. Pressurized air is supplied to the pneumatic components through a pressurized air line system. The control subsystem halts motion of the patient positioning surface if the clearance distance is less than or equal to a minimum safe clearance distance. The jacket, the compressible member, and the mist-discharging conduit are an integrally formed single piece.