Abstract: Before any supply of remote power to a telecommunications terminal connected to a local area network, the Ethernet equipment must recognize the power class of the terminal by measuring a specific electrical signature of the terminal via their interconnection. If the Ethernet equipment is unable to supply the required power, then it will send a specific signal via the interconnection which will activate an alarm on the terminal. The possibility to be alerted by a specific alarm from the terminal if no remote power can be supplied to it, will advantageously inform the terminal user of the problem and allow the user to look for an alternative.

Abstract: A terminal adapter connects a terminal to a computer local area network capable of identifying any of several terminal types by detecting the presence of a particular identifier electronic circuit specific to one type, even though the terminal does not include any such identifier circuit as standard. The terminal adapter includes first connectors for inserting the adapter between two sections of a connection between the terminal and the network and an identifier circuit specific to one type of terminal that the network is able to detect. The identifier circuit is connected to at least two conductors of a network side section of the connection.

Abstract: A first resistor is connected in parallel with a second resistor having a lower resistance than the first resistor. The voltage at the terminal of the first resistor is compared with a first threshold voltage, and the voltage at the terminals of the second resistor is compared with a second threshold voltage. A switching device either connects the first resistor in series in a remote power feed circuit, if the switching device detects that the remote power feed current is less than a third threshold current that is between the first and second threshold currents, or connects the second resistor and the first resistor, connected in parallel, in series in the remote power feed circuit if the switching device detects that the remote power feed current is greater than the third threshold current.

Abstract: A method is disclosed that enables a mobile user having a terminal at least able to connect to a public land mobile network and a terminal at least able to connect to a wireless local area network forming part of a private network, on switching between the public land mobile network and the private network, to receive calls via the network more suited to his location. The method determines if the terminal able to connect to the wireless local area network is present in or absent from the coverage area of the wireless local area network. It activates call forwarding to a predetermined call forwarding number when the terminal at least able to connect to a wireless local area network is present in the coverage area of the wireless local area network and then deactivates call forwarding when the terminal is no longer present in the coverage area of the wireless local area network.

Abstract: In a method of controlling a frequency via an asynchronous transmission network, signals received at the output of the asynchronous transmission network have been clocked at a reference frequency and transmitted by the network with respective varying transit delays and the frequency of a local clock is slaved to the reference frequency by means of an error signal formed from selected received signals with minimal transit delays. Applications include local mobile telephone networks.

Abstract: A processing server (10) allocates user terminals (8) resources of a local area network (WLAN). The server (10) is connected to at least one access point (1) to the local area network (WLAN) and includes control means (11) adapted, firstly, to classify the terminals (8) in a first group or a second group according to whether or not they are adapted to establish with said local area network (WLAN) communications encrypted in accordance with at least one format and, secondly, to allocate resources of the local area network (WLAN) to terminals (8) attempting to establish communication therewith as a function of whether they are classified in said first group or said second group.

Abstract: A method for sending a remote power feed to a terminal in a local area network. A repeater of the local area network produces a detection signal in a line to which a remote terminal is connected, and the signal has an energy level that will not damage the terminal. The presence of a remote terminal adapted to receive a remote power feed via the repeater is detected by detecting the presence of a predetermined impedance in the terminal, and power is supplied to the terminal via the repeater in response to detection of the presence of the terminal.

Abstract: A terminal includes a local power supply, which can be backed up by a remote power feed, and an identification module connected to at least two conductors of a link. The module enables remote detection that the terminal can receive a remote power feed. The terminal further includes a circuit for drawing a predetermined remote power feed current and which is activated when the local power supply is working normally and disabled if the local power supply is not working normally and if the remote power feed is not applied to the link. Applications include telephone terminals using the Internet protocol.

Abstract: It is advantageously taken profit of the fact that before any supply of remote power to a telecommunications terminal connected to a local area network, the Ethernet equipment must recognize the power class of said terminal by measuring a specific electrical signature of said terminal via their interconnection. In the case said Ethernet equipment will stand in a situation unable to supply the required power, then it will send a specific signal via said interconnection which will activate an alarm on said terminal. The possibility to be alerted by a specific alarm from said terminal in the case no remote power can be supplied to it, will advantageously inform the user of that terminal about the powering situation. This will prevent any confusion about the reason of a wrong running of that terminal and may allow to look for an alternative.

Abstract: A remote power feed device for supplying a remote power feed to a terminal in a telecommunication network includes a first resistor and a second resistor in parallel with the first resistor and having a lower resistance than the first resistor. It compares the voltage at the terminal of the first resistor with a first threshold voltage and the voltage at the terminals of the second resistor with a second threshold voltage. It further includes a switching device for either connecting the first resistor in series in the remote power feed circuit if the switching device detects that the remote power feed current is less than a third threshold current that is between the first and second threshold currents or connecting the second resistor and the first resistor connected in parallel in series in the remote power feed circuit if the switching device detects that the remote power feed current is greater than the third threshold current. Applications include repeaters and concentrators for local area networks.

Abstract: Packets conveying data are received by a router via input ports which impose on them optical carrier waves whose wavelengths correspond to the ports. Respective time-delays are applied to the packets and they are broadcast to spatial selectors that transmit them to spectral selectors. Amplifiers are distributed over the paths of the packets and the paths are organized in such a manner as to limit the number of semiconductor optical switches in the selectors and to minimize noise and optical crosstalk affecting the packets.

Abstract: A terminal includes a local power supply, which can be backed up by a remote power feed, and an identification module connected to at least two conductors of a link. The module enables remote detection that the terminal can receive a remote power feed. The terminal further includes a circuit for drawing a predetermined remote power feed current and which is activated when the local power supply is working normally and disabled if the local power supply is not working normally and if the remote power feed is not applied to the link. Applications include telephone terminals using the Internet protocol.

Abstract: Each station is connected to the token ring network (5) through station and token ring interface units, the latter of which units has a switch (37) for connecting the station to the token ring (5) to transmit signals it receives in digital form either from the token ring or from the station via the associated station interface unit. The data signal received from a station clocked by an oscillator of that station is transcoded in the associated token ring interface unit before it is recoded in its original form under the control of an oscillator (12) common to the stations of the device which is slaved to the oscillator of one of the stations taken as a master station.

Abstract: A time-division switching system, in particular a multiservice key telephone or PABX system, is controlled by programmed management logic and synchronized by a timebase for selective on-demand exchange of information between terminations to which telecommunications terminals are connected either directly or through links to other, identical or at least compatible switching systems. The system includes programmed system management logic based on an optionally duplicated processor with directly addressable memory which stores all command operations, in particular those for switching information exchanged by means of the terminations which are connected in parallel to a port of the processor by a bus-type time-division multiplex link.

Abstract: A method for sending a remote power feed to a terminal in a local area network. A repeater of the local area network produces a detection test signal in a line to which a remote terminal is connected, and the signal has an energy level that will not damage the terminal. The presence of a remote terminal adapted to receive a remote power feed via the repeater is detected by detecting the presence of a predetermined impedance in the terminal, and power is supplied to the terminal via the repeater in response to detection of the presence of the terminal.