Abstract: A hardware device for processing the tasks of an algorithm of the type having a number of processes the execution of some of which depend on binary decisions has a plurality of task units (10, 12, 14), each of which are associated with a task defined as being either one process or one decision or one process together with a following decision. A task interconnection logic block (16) is connected to each task unit for communicating actions from a source task unit to a destination task unit. Each task unit includes a processor (18) for processing the steps of the associated task when a received action requests such a processing.

Abstract: A hardware device for processing the tasks of an algorithm of the type having a number of processes the execution of some of which depend on binary decisions has a plurality of task units (10, 12, 14), each of which are associated with a task defined as being either one process or one decision or one process together with a following decision. A task interconnection logic block (16) is connected to each task unit for communicating actions from a source task unit to a destination task unit. Each task unit includes a processor (18) for processing the steps of the associated task when a received action requests such a processing. A status manager (20) handles actions coming from other task units and builds actions to be sent to other task units.

Abstract: A node for a telecommunications network has a segmentation and reassembly module (SAR module) to perform segmentation and reassembly (SAR) on cells received by the node, the SAR module particularly providing Virtual Channel Identifier (VCI) and Virtual Path Identifier (VPI) translation (referred to as VCI/VPI translation), and has a direct memory access (DMA) mechanism for a storage external to the SAR module, the SAR module performing a first DMA access when the VCI/VPI translation are representative of an error code correcting (ECC) procedure to be carried out in the node, and the SAR module performing a second DMA access when the VCI/VPI translation corresponds to a message that does not require a local ECC procedure. A coder/decoder module performs an ECC procedure on the cells. A controller controls the coder/decoder module to perform an error correcting procedure in response to the detection of the first DMA access. The first DMA access uses a first address and the second DMA uses a second address.

Abstract: The present invention is directed to computer viruses and more particularly to a method and system for use in a virus-free certificate firewall, of controlling and filtering files using a virus-free certificate.

Abstract: Method for performing the analysis of the characteristics of a data path from a first data processing device to a second data processing device through a network comprising at least an autonomous system consisting in defining a scenario file the scenario to be used, such a scenario including the actions to be used, building a parameter file defining the parameters to be used in the actions, running at least one analysis module based upon the actions of the scenario file and the parameters of the parameter file, the analysis module calling at least a predefined information requesting procedure, and storing in at least an output file the data resulting from the running of the analysis modules

Abstract: A method and system as disclosed for use in a virus-free certificate proxy (107, 801), of retrieving from one or a plurality of virus-free certificate authorities (104, 804) a virus-free certificate (200) certifying that a file is virus-free. The method includes the steps of: receiving (1001) virus-free certificate request for a file; selecting a virus-free certificate authority (104, 804) having authority to generate a virus-free certificate (200) for the file; requesting (1003 . . . 1007) the virus-free certificate to the selected virus-free certificate authority (104, 804); receiving (1003 . . . 1007) from the selected virus-free certificate authority the generated virus-free certificate; sending back (1005) in response to the virus-free certificate request the received virus-free certificate.

Abstract: System for transferring a data file from a web server to a user workstation through a network and reciprocally, the user workstation including a hard disk (205) for storing the data file being transferred over a SCSI bus (208). The user workstation includes a dual-port memory (304) for storing temporarily the data file, a network logic unit (302) interconnected between the network and the input port of the dual-port memory for receiving the data file from the network and transmitting it to the dual-port memory, and a SCSI logic unit (303) interconnected between the output port of the dual-port memory and the SCSI bus for transferring the data file from the dual-port memory to the hard disk over the SCSI bus and reciprocally.

Abstract: A method and system for establishing a Virtual Path (VP12) capability in a Frame Relay network wherein frames are transmitted over a plurality of virtual circuits from a first switching node to a second switching node. A control message is transmitter from the first switching node to the second switching node with a Data Link Connection Identifier (DLCI) having a predetermined value indicating the purpose of the control message which is to define a virtual path aggregating at least two virtual circuits selected from multiple virtual circuits. The control message contains the identification of the virtual circuits aggregated in the defined virtual path.

Abstract: Data transmission system for transmitting packets of data from a source workstation (10) to a destination workstation (40) wherein the packets of data are transmitted over at least a first IP network (14) and a second IP network (30) between an ingress node (20) connected to the source workstation in the first network and an egress node (38) connected to the destination workstation in the second network. The system comprises a local reservation server (26) in the first network accessible by the source workstation and a remote reservation server (42) in the second network accessible by the local reservation server. The local reservation server includes connection setup means for setting up a virtual connection meeting a predefined requirement of Quality of Service from the ingress node to the egress node in response to a request from the source workstation and bandwidth request means for requesting additional bandwidth in the second network to the remote reservation server.

Abstract: A system and method for performing interleaved packet processing. A packet includes a source address bit pattern and a destination address bit pattern that are processed by a task processor in accordance with a data tree. A first bank of registers is utilized to load an instruction to be executed by the task processor at nodes of the data tree in accordance with the source address bit pattern. A second bank of registers is utilized for loading an instruction to be executed by the task processor at nodes of the data tree in accordance with the destination address bit pattern. A task scheduler enables the first bank of registers to transfer an instruction loaded therein for processing by the task processor only during even time cycles and for enabling the second bank of registers to transfer an instruction loaded therein for processing by the task processor only during odd time cycles.

Abstract: Data communication system of the type wherein a plurality of contiguous transmission networks constitute an Autonomous System (AS) using the Open Shortest Path First (OSPF) protocol for the exchange of information. The system is divided into several areas including an area 0 or backbone responsible for distributing routing information between the other areas. The backbone is divided into two sub-areas and comprises at least a pair of adjacent splitting routers. The first splitting router is included in one sub-area and the second splitting router is included in the other sub-area. The topological data base of each splitting router is configured to define a high metric for the link between the splitting routers in order to prevent any type of data traffic other than link-state messages (LSA) from being transmitted between the splitting routers.

Abstract: Data transmission system for transmitting packets of data from a source workstation (10) to a destination workstation (18) wherein the packets of data are transmitted over at least an IP network (14) between an ingress node (16) connected to the source workstation and an egress node (20) connected to the destination workstation, wherein each router within the intermediary nodes along the data path from the ingress node to the egress node determines the best route in a routing table defined by the contents of a field contained in each packet of data being received. For this, the router of the ingress node comprises a configuration table which defines the contents of the TOS field in function of information associated with the 4/5 level protocol such as TCP or UDP.

Abstract: Method for transmitting high-priority packets in an IP transmission network based upon the Internet Protocol (IP) wherein low-priority packets or fragments of packets are transmitted between a sender and a receiver and at least a high-priority packet can be transmitted from the sender to the receiver by pre-emption of a low-priority packet or a fragment of packet. The method comprises in the sender, the steps of determining whether a low-priority packet or fragment of packet is being transmitted from the sender to the receiver when a high-priority packet has to be transmitted, setting to 1 a reserved bit within the IP header of the high-priority packet used as a pre-emption indicator if a low-priority packet or fragment of packet is currently transmitted, transmitting the high-priority packet with the pre-emption indicator set to 1 from the sender to the receiver, and resuming the transmission of the low-priority packet or fragment of packet at the end of transmission of the high-priority packet.

Abstract: A method and system are disclosed for generating and using a virus-free file certificate. The method, for use in a virus-free certificate authority (102), includes the steps of: receiving (300) a virus-free certificate request for a file from a server (101) or a client (100) system; determining (301) whether the file is virus-free or not; if the file is declared virus-free by the virus-free certificate authority (102): generating (303, 304) a virus-free certificate (200) including a file signature (207) for certifying that said file is declared virus-free by the virus-free certificate authority (102); sending (306) back in response to the virus-free certificate request the virus-free certificate (200).

Abstract: Server assisted system for accessing web page fields comprising a wireless Personal Data Assistant (PDA) communicating with the Internet by the intermediary of a wireless Internet gateway and a portal server capable of accessing the resources of the Internet such as servers. The portal server comprises a data base containing at least identifying information enabling fields of web pages selected by the user to be retrieved, and portal handling means for accessing the selected web page fields, and the PDA comprises portal browsing means for browsing the selected web page fields and retrieving at least one of them and display means for displaying the retrieved web page field.

Abstract: The present invention relates to computer viruses and more particularly to a method and system for caching anti-virus file certificates. Each anti-virus certificate associated with a file comprises a file signature. The file signature is generated by a virus-free certificate authority, which avoids the system, which receives the file to check this file for all existing viruses. The virus-free certificate authority validates the file against all known viruses, using one or several anti-virus checkers. In case of new viruses, only the virus-free certificate authority is changed and the only process performed by the system receiving the file is to verify the file against the file signature included in the virus-free certificate, and to filter the file according predetermined rules. The present invention drastically simplifies the computing resources for detecting viruses on network devices such as IP Routers and Firewalls.

Abstract: A method and system for dynamically inverting an A symmetric Digital Subscriber Line (ADSL) system. The ADSL system includes a central exchange equipment (CE) connected to a service provider network and a user equipment (UE) connected to a user workstation. The CE and UE are interconnected by a PSTN link. The CE includes an ADSL transceiver and a splitter coupled between the CE transceiver and the PSTN link. The splitter includes a low-pass filter for separating low frequency voice signals from high frequency ADSL signals transmitted from the UE. In accordance with the method of the invention, an invert request message encoded as a tone sequence is generated by the UE and transmitted to the CE over the PSTN link. The tone-encoded invert request is received through the CE splitter low-pass filter and is decoded utilizing a tone decoder communicatively coupled between the CE splitter low-pass filter and the CE transceiver.

Abstract: Method of managing the exchange of a file from a sender (13) to a receiver (12, 15) in a data transmission network (10, 11) wherein any user amongst a plurality of users can send an electronic mail with at least an attached file to at least another user. The method comprises the following steps: the original file corresponding to the file to be sent as an attachment to the electronic mail is forwarded by the sender to a file server (14), a substitute file including at least data identifying the original file is sent by the file server back to the sender upon receiving the original file, the substitute file is attached to the electronic mail before sending this one by the sender to the receiver, and the receiver gets, at anytime, the original file from the file server by providing the file server with the parameters of the substitute file.

Abstract: Data transmission system including at least a data transmission network (10, 12), at least a server (29), a plurality of users (16, 18, 20) able to be connected to the server in order to get data from it and at least a user being able to initiate a denial of service attack, the system further including a security network manager (30) and at least a detecting device for detecting abnormal operating conditions with respect to an operation of the system defined by predetermined parameters and transmitting detection messages to the security network manager, the security network manager activating filtering actions upon receiving the detection messages.

Abstract: A file manager (and method) provided for locating a file identified by a path referring to a logical unit and an identifier, includes a table associating the file with a priority list of physical units. The file manager can be incorporated into the controller of peripheral devices in a computer system or an operating system of the computer system.