A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a transmission unit connected to the pair of terminals via a pair of capacitor, and a DC power supply, a switch, and inductances, each connected in series between the pair of terminals without interposition of the pair of capacitors. A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a reception unit connected to the pair of terminals via a pair of capacitors, and a load resistor and inductances each connected in series between the pair of terminals without interposition of the pair of capacitors.

A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a transmission unit connected to the pair of terminals via a pair of capacitor, and a DC power supply, a switch, and inductances, each connected in series between the pair of terminals without interposition of the pair of capacitors. A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a reception unit connected to the pair of terminals via a pair of capacitors, and a load resistor and inductances each connected in series between the pair of terminals without interposition of the pair of capacitors.

A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a transmission unit connected to the pair of terminals via a pair of capacitors, a direct-current (DC) power supply connected in series between the pair of terminals without interposition of the pair of capacitors, and switches disposed on opposite sides of the DC power supply. A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a reception unit connected to the pair of terminals via a pair of capacitors, a load resistor and inductances connected in series between the pair of terminals without interposition of the pair of capacitors.

A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a transmission unit connected to the pair of terminals via a pair of capacitors, a direct-current (DC) power supply connected in series between the pair of terminals without interposition of the pair of capacitors, and switches disposed on opposite sides of the DC power supply. A transmission device includes a pair of terminals connected to an electrical coupler via a pair of signal lines, a reception unit connected to the pair of terminals via a pair of capacitors, a load resistor and inductances connected in series between the pair of terminals without interposition of the pair of capacitors.

A train communication system which performs communication between a vehicle-mounted device and a TCMS includes one or a plurality of the vehicle-mounted devices and the TCMS. The vehicle-mounted device converts a signal to the TCMS into a signal in a network transmission format which is a format used for transmission over a network connectable by a plurality of vehicle-mounted devices and transmits the signal via the network and converts a signal in the network transmission format received from the TCMS via the network into a signal in an original format. The TCMS converts a signal to the vehicle-mounted device into a signal in the network transmission format and transmits the signal via the network, and converts a signal in the network transmission format received from the vehicle-mounted device via the network into a signal in an original format.

According to an embodiment, a train control device includes an acceleration detection unit and a train control unit. The acceleration detection unit detects acceleration of a train along a rotation radius direction, when the train is turning and passing a curved section of a rail line with a cant. The train control unit sets a passing speed of the train passing through the curved section so that a state of the train is placed in a balanced cant, based on a direction of the detected acceleration.

An on-vehicle communication system mounted on a vehicle comprises a first switching device, a second switching device and a third switching device each including a first communication port and a second communication port. The first communication port and the second communication port of the first switching device are respectively connected to the first communication port of the second switching device and the first communication port of the third switching device, and the second communication port of the second switching device and the second communication port of the third switching device are connected to each other. Each of the first switching device, the second switching device and the third switching device measures a reception signal quality for the first communication port of the device itself and a reception signal quality for the second communication port of the device itself. One of the first communication port and the second communication port is selected as a port for use which should be used for communication in each of the first switching device, the second switching device and the third switching device. Each of the switching devices performs switching processing for determining whether or not the port for use is to be switched to the another one of the first communication port and the second communication port based on the reception signal quality for the first communication port and the second communication port.

An on-vehicle communication system mounted on a vehicle comprises a first switching device, a second switching device and a third switching device each including a first communication port and a second communication port. The first communication port and the second communication port of the first switching device are respectively connected to the first communication port of the second switching device and the first communication port of the third switching device, and the second communication port of the second switching device and the second communication port of the third switching device are connected to each other. Each of the first switching device, the second switching device and the third switching device measures a reception signal quality for the first communication port of the device itself and a reception signal quality for the second communication port of the device itself. One of the first communication port and the second communication port is selected as a port for use which should be used for communication in each of the first switching device, the second switching device and the third switching device. Each of the switching devices performs switching processing for determining whether or not the port for use is to be switched to the another one of the first communication port and the second communication port based on the reception signal quality for the first communication port and the second communication port.

A terminal device which receives command information from a central device in a train information management system, includes a transmission-reception unit which transmits and receives the command information to and from the central device or other terminal device and periodically receives command information from a plurality of central devices, a control unit which determines whether or not management information, which is information on a train composition set by a central device which is a transmission source, regarding the received command information, is normal command information and determines command information to be adopted based on a priority set to the central device which is the transmission source when receiving the normal command information from the plurality of central devices, and a storage unit which stores information on the priorities set to the plurality of central devices.

An apparatus for supporting development of a program used in a control device of a train monitoring and controlling apparatus including a plurality of intra-train networks, the control device transmitting/receiving signals to/from the plurality of intra-train networks, the control device including a plurality of communication substrates for communicating with one of the plurality of intra-train networks and the control substrate connected to the plurality of communication substrates, the program development supporting apparatus receives a communication-substrate network communication data definition file used in each of the plurality of communication substrates, generates a control-substrate input/output signal variable definition file by using the communication-substrate network communication data definition file, and outputs the control-substrate input/output signal variable definition file. The control-substrate input/output signal variable definition file is used in the control substrate, the control substrate performing communication in a communication data format that is common among the plurality of communication substrates.