Abstract: A firmware upgrade method for a network device through a digital subscriber line. First, the network device transmits a request to a dynamic host configuration protocol server through a digital subscriber line. Then, information comprising a file server address and a query message are transmitted from the dynamic host configuration protocol server through the digital subscriber line to the network device in response to the request. The network device determines whether to upgrade the firmware of the network device according to the answer of the query message. If the network device determines to upgrade the firmware thereof, updated information about the firmware is downloaded from a file server corresponding to the file server address. Finally, the firmware of the digital subscriber line device is upgraded according to the updated information.

Abstract: A push cart transferable to a back holder and a chair includes a pair of connecting mounts jointing a bottom frame and a back frame as well an angle adjusting device jointing with an upper frame and the back frame; wherein the angle adjusting device adjusts the rotation angle of the upper frame; the bottom frame displaces and positions vertically or horizontally in a concave slot of the connecting mount; the connecting mounts slide at a limited distance on a left and a right lateral tubes of the back frame so as to fulfill the embodiment of being a push cart, a back holder or a chair.

Abstract: Disclosed is an exerciser utilizing a user's own weight as a load on the exerciser for the user to overcome by applying force on a handle bar or two foot rests of the exerciser and lifting the user's body seated on a seat holder of the exerciser.