Abstract: An xDSL interconnecting device for interconnecting the first analog line and the second analog line, includes: the first analog transmit/receive unit, connected to the first analog line, for transmitting an analog signal having the first frequency band to the first analog line and receiving an analog signal having the second frequency band higher than the first frequency band from the first analog line; the second analog transmit/receive unit, connected to the second analog line, for transmitting an analog signal having the second frequency band to the second analog line and receiving an analog signal having the first frequency band from the second analog line; and an interconnecting unit, connected to the first and second transmit/receive units, for interconnecting communication between the first and second analog transmit/receive units.

Abstract: Telephone sets 2-1 to 2-n and computers 1-1 to 1-n are connected to a terminal board 6 via common home-side wires 9-1 to 9-n. This terminal board 6 has a structure in which telephone wires 14-1 to 14-n from a public telephone network 61 are connected thereto while the home-side wires 9-1 to 9-n branch off to a line concentration switch 7 therein and terminal-board-side splitters 13-1 to 13-n connected between the telephone wires 14-1 to 14-n and the home-side wires 9-1 to 9-n are disposed therein, so that the telephone sets 2-1 to 2-n can use a telephone service via the public telephone network 61 and the computers 1-1 to 1-n can perform high-speed data communication with the Internet 62 by a VDSL service using an optical fiber cable 10 via a router 8 connected to the line concentration switch 7.

Abstract: A hub for a local area network according to one embodiment of the present invention includes a plurality of communication ports connected to each of nodes in the network, through which a signal is transmitted among the nodes, a signal processing circuit having at least the functions of repeating the signal among the nodes and reshaping a waveform thereof, and a power supply circuit for supplying a dc current for driving the signal processing circuit.