Abstract: The invention relates to a method for transparently exchanging data packets with a packet-oriented network, via which a number of network elements and a network node device are connected based on a common access method. The network elements are allocated unique local addresses only within the network. The network node device connects the packet-oriented network to an external device based on a point-to-point protocol and performs an address conversion of the address of a network element, said address being allocated within the packet-oriented network, into an address valid for the external device. A verification of message header entries of the data packets exchanged between the external device and the network element permits the establishment of a temporary transparent connection of the network element to the external device in the event an entry is detected the characterizes an expanded point-to-point protocol, e.g.

Abstract: A method is provided for switching data between appliances in a packet-oriented local area network and an external appliance connected to the local area network via a router. The appliances in the local area network, including the router, respectively have a network address and an appliance address. The external appliance has an associated network address. An appliance address request relating to the assigned network address is responded to with the appliance address of the router. The router forwards packets containing the assigned network address and the appliance address of the router as destination addresses from the local area network to the external appliance.

Abstract: A communications apparatus includes a router 10, a network address translator 12 and a connection controller 11. The connection controller 11 governs the connection from LAN 1 to other networks such as the Internet. The LAN serves a number of terminals 2 to 7. In the event that the connection controller determines that the link to a particular LAN is not used it will enter a short term hold process. After a predetermined time has elapse the connection is broken. However, this short term hold process can be circumvented by the network translator maintaining a record of the terminal use (or more particularly a port serving an application on the terminal). In the event that all the terminals are determined as not in use then a message is sent to the connection controller 11 indicating such and the connection is released. This avoids unnecessary connection cost and also enhances security of the LAN 1.

Abstract: A method and apparatus are disclosed for adjusting the bandwidth of a connection between at least two communication endpoints in a data network via a monitoring unit and a control unit. The connection in the data network is assigned at least one transmission channel for data transmission. The user data is, in this case, allocated to at least one communication connection; in particular a voice connection. The monitoring unit monitors the signaling connection for requests for at least one further communication connection; in particular, a voice connection. When a request occurs, it signals to the control unit to assign to the connection one or more additional free transmission channels for the at least one requested communication connection.

Abstract: The invention relates to a method for transparently exchanging data packets with a packet-oriented network, via which a number of network elements and a network node device are connected based on a common access method. The network elements are allocated unique local addresses only within the network. The network node device connects the packet-oriented network to an external device based on a point-to-point protocol and performs an address conversion of the address of a network element, said address being allocated within the packet-oriented network, into an address valid for the external device. A verification of message header entries of the data packets exchanged between the external device and the network element permits the establishment of a temporary transparent connection of the network element to the external device in the event an entry is detected the characterizes an expanded point-to-point protocol, e.g.

Abstract: On receiving a message in a communications device, a sender or destination network address is checked to determine whether the network address is intended for address conversion. In cases in which the network address is intended for address conversion, a received virtual destination network address is converted to a communications-device-internal destination network address, or a received communications-device-internal sender network address is converted to a virtual sender network address.

Abstract: A method and apparatus are disclosed for adjusting the bandwidth of a connection between at least two communication endpoints in a data network via a monitoring unit and a control unit. The connection in the data network is assigned at least one transmission channel for data transmission. The user data is, in this case, allocated to at least one communication connection; in particular a voice connection. The monitoring unit monitors the signaling connection for requests for at least one further communication connection; in particular, a voice connection. When a request occurs, it signals to the control unit to assign to the connection one or more additional free transmission channels for the at least one requested communication connection.

Abstract: A method is provided for switching data between appliances in a packet-oriented local area network and an external appliance connected to the local area network via a router. The appliances in the local area network, including the router, respectively have a network address and an appliance address. The external appliance has an associated network address. An appliance address request relating to the assigned network address is responded to with the appliance address of the router. The router forwards packets containing the assigned network address and the appliance address of the router as destination addresses from the local area network to the external appliance.

Abstract: A method for setting up a communications connection via an IP-oriented network originating from a device connected to a local computer network, the local computer network being connected via a router device to a communications network, which in turn is connected via a multiplicity n of conversion devices to the IP-oriented network. A selection unit is implemented in the router device which, using information transferred by the device, selects one of the conversion devices. A connection is subsequently set up by the router device via the communications network to the selected conversion device.

Abstract: On receiving a message in a communications device, a sender or destination network address is checked to determine whether the network address is intended for address conversion. In cases in which the network address is intended for address conversion, a received virtual destination network address is converted to a communications-device-internal destination network address, or a received communications-device-internal sender network address is converted to a virtual sender network address.

Abstract: The mobile machine travels underground in a mine along a predetermined path and has a stationary prime mover for driving it. A portable remote control unit is carried by the human operator outside the passenger compartment of the mobile machine, for controlling operation of the prime mover. The portable remote control unit includes a transmitting antenna. When the operator rides in the passenger compartment, he places the portable unit in a special holder therefor. A coupling circuit couples the transmitting antenna of the portable unit, when the latter is inside the passenger compartment with the operator, to an exterior transmitting antenna, so that the substantially closed passenger compartment walls will not prevent transmission of remote control signals. The signals are picked up by a receiving antenna and transmitted to a stationary control unit which correspondingly controls the operation of the prime mover.

Abstract: A method and apparatus are disclosed for adjusting the bandwidth of a connection between at least two communication endpoints in a data network via a monitoring unit and a control unit. The connection in the data network is assigned at least one transmission channel for data transmission. The user data is, in this case, allocated to at least one communication connection; in particular a voice connection. The monitoring unit monitors the signaling connection for requests for at least one further communication connection; in particular, a voice connection. When a request occurs, it signals to the control unit to assign to the connection one or more additional free transmission channels for the at least one requested communication connection.