Abstract: There are disclosed a method and device for searching equipment, such as a printer, connected to a network through a router by using a broadcast packet are disclosed. A host 110 acquires routing information from a router 200. The host 110 analyzes a domain name of a sub network B103 in the routing information so as to acquire a broadcast address in the domain, then, send a broadcast packet requesting a printer name addressed to the broadcast address through the router 200. The host 110 searches a printer 120 by receiving a response packet for the broadcast packet.

Abstract: A system includes a telephony device (152) and a computer (102) coupled to a telephone line (194). The computer (102) includes an input device (210) and a processor (205). The processor (205) receives an electronic document that includes data representing a telephone number. The processor (205) further receives input via the input device (210) selecting the telephone number from the electronic document. The processor (205) additionally signals, via a packet-switched network (135) coupled to the telephone line (194), a telecommunication system (145) to connect a call between a telephone (156) associated with the telephone number and the telephony device (152) in response to the selection of the telephone number, the call being connected via the telephone line (194).

Abstract: A method for processing a great amount of intra-calls in the remote control system of a full electronic exchange system, whose time switch block is provided with a voice memory device and a control memory device to switch the PCM data to the intra-direction, and with a call pass controller to transfer to the host system or loop to the intra-direction the PCM data, comprises the steps of writing call direction data for designating the intra-call direction into the data region of the control memory device to switch the PCM data sequentially stored in the voice memory device to the intra-direction, and looping the entire channels to the intra-direction to switch the PCM data from the time switch block to the intra-direction if the call direction data designates the intra-call direction according to the treatment of the great amount of the intra-calls.

Abstract: A digital subscriber link data network incorporates a throughput test server (TTS) to provide fault identification, isolation, and verification of DSL service availability and data rates. An asymmetric digital subscriber line (ADSL) terminal unit—remote (ATU-R) is connected to an ADSL terminal unit—central office (ATU-C) over a conventional copper loop or equivalent. Data connectivity via a packet switch provides access to high speed data networks, TTS connectivity and interfaces to service providers (SPS). Upon receiving a test request, a technician routes a customer to the TTS. The customer uses a web browser to access the TTS and download executable testing software, e.g., a JAVA applet. The applet causes test messages to be sent to and received from the TTS and computes upstream and downstream data rates that is displayed to the customer together with whether the measured data rates are consistent with a specified class of service.

Abstract: The present invention provides a method for supporting sleep mode wake up in a home phone line network. The method includes: detecting a limited automatic repeat request (LARQ) header in a frame; stripping the LARQ header and a frame check sequence (FCS) in the frame; recalculating the FCS for the stripped frame; and adding the recalculated FCS to the stripped frame. The method strips the LARQ header from a HPNA frame before it is sent to an Ethernet controller. By stripping the LARQ header, the Ethernet controller will correctly find the set byte location for the wake pattern and attempts to match the bit pattern with the wake pattern. In this manner, sleep mode wake up is supported.

Abstract: A system and method for providing fault tolerance in a network telephony system. Signaling messages according to a signaling protocol, such as the SIP protocol, are modified to include a path attribute with a network address corresponding to a backup proxy server. When a primary proxy server is supported by a backup proxy server, the primary proxy server inserts the Alternate Path tag into one or more signaling messages. When a network entity sends a message, it checks the message to identify the primary proxy server. Upon receiving a failure or timeout when attempting to send to the primary proxy server, the sending network entity should try the backup proxy server specified in the path attribute. When the backup proxy server receives the message, it may modify the message to specify the new routing path. As a result, subsequent messages get routed properly using the backup proxy server.

Abstract: A communication network includes a plurality of nodes, selectively including a client, a remote gateway Internet service provider, the Internet, a local enterprise gateway, and an enterprise internal network. A local coincident endpoint is established at the local gateway for an outer connection with a remote node and an inner connection with the same or a different remote node. Nested traffic received at the gateway on the outer connection is decapsulated and then source-in NATed. Traffic received at the gateway for transmission on the outer connection is first source-in NATed, and then encapsulated for communication on the outer connection.

Abstract: To provide a switching system with telephone switching function mainly on the basis of hardware processing by using isochronous channel which is a real time communication channel. The switching system comprises a gateway node connected with ISDN (Integrated Services Digital Network) and PSTN (Public Switched Telephone Network), and one or more extension nodes, and a serial bus such as IEEE 1394 bus. The gateway node transforms data rate of outside line into data rate of extension node, and the other way around, and secure a seamless communication channel. Concretely, the gateway node secures an isochronous channel, according to a request from the extension nodes or the outside line, and executes switching such as transfer or reservation. A resource manager holds a table for managing the gateway node and extension node.

Abstract: A frame forwarding scheme for network stations operating in a shared medium data transmissions network. The frame forwarding scheme uses payload encapsulating delimiters and control information in the payload to enable a frame originating from a first station and intended for a second station to be forwarded to the second station by an intermediate station. The first station selects a station as an intermediate station for purposes of frame forwarding based on the data transmission quality or reliability to be achieved using that station as an intermediate station.

Abstract: An asynchronous transfer mode switch includes a switching engine with a set of buffer groups having a set of 1-cell buffers where a cell is stored in only one buffer. The number of buffer groups exceeds the number of input ports. The switching engine also comprises a buffer management module, which includes a FIFO memory to maintain a pool of buffer groups that have at least one available buffer and memory to store bit maps for each buffer group and to store a CNT field value for each buffer to indicate which of its buffers are available to store a new cell, and which buffers still contain a cell that have not yet been read by its destination ports. The bit maps and CNT field values are updated during buffer allocation and buffer reads so that the FIFO maintains a current list of all buffer groups having available buffers.

Abstract: An inverse multiplexer device has an input port for receiving a stream of data packets, a plurality of output ports for connection to outgoing physical links, and transmit buffers for preparing outgoing packets. An expansion port can receive packets from the transmit buffers and transfer them through a corresponding expansion port on another like inverse multiplexer to designated output links on the other inverse multiplexer. A controller outputs the data packets on a group of any of the aid links in accordance with an inverse multiplex protocol. The multiplexers can be thus cascaded to increase the number of output links that can be accommodated.

Abstract: In a network of interconnected edge and core routers, where packet data flows are received at edge routers and then transmitted toward intended destinations via a path through one or more core routers, fair bandwidth sharing is achieved without per-flow state monitoring in the interior routers. Each edge router is arranged to divide each input data flow into a set of layers each having an associated level, based on rate. The division process is done without reference to the content of the flow, and can use layers of equal or unequal size. The packets in a flow are marked at an edge router with their layer level, in a globally consistent manner. Each core router maintains a layer level threshold, based upon buffer management conditions, and drops layers whose level exceeds the threshold. During congestion, the level threshold is decreased; when congestion clears, the level threshold is increased.

Abstract: The congestion control in a networking device having a plurality of input interface queues includes (a) estimating the data arrival rate on each of the plurality of input interface queues, and (b) determining, for each polling round, the sequence in which the plurality of input interface queues should be polled and the quantity of data to be processed from each of the plurality of input interface queues each time the input interface queue is polled, using the estimated data arrival rate on each of the plurality of input interface queues.

Abstract: A system (100) for receiving data from an asynchronous network and transmitting such data onto a synchronous network includes a voice packet buffer memory system (108) with a jitter buffer (118) having groups of entries storing data for voice channels and jitter buffer valid bit (JBVB) memory (120) for status of a particular entry for multiple jitter buffer groups. Writing or reading data from a jitter buffer entry sets a corresponding JBVB memory bit to a valid or invalid state respectively. Jitter buffer data may be read with a corresponding state memory bit. If a corresponding JBVB memory bit is valid, data from a jitter buffer (118) may be provided as an output. If a corresponding JBVB memory bit is invalid, a loss recovery algorithm may compensate for such invalid jitter buffer data.

Abstract: A concatenated signal carrying an arbitrary mix of concatenated data traffic is split and transported across a network between a start node and an end node through a hyper-concatenated connection set up through independent pointer processor state machines. At a start node, the concatenated optical signal is split into two or more hyper-concatenated data streams. If a split occurs at a frame within a concatenated signal, the start node replaces a concatenation indicator of the frame with a payload pointer from a first frame of the concatenated signal and inserts a split indicator in the SS bits of the frame overhead. At an end node, the hyper-concatenated data streams are recombined to recover the original concatenated signal. Frames containing split indicators are modified to remove the split indicator and to replace the payload pointer with a concatenation indicator.

Abstract: A system controller on a half-duplex communication bus architecture gathers statistical data from at least one line card. The line card automatically collects statistical data for the system controller in a controlled manner in an information buffer. Then, the line card reports a subset of the statistical data in the buffer to the system controller when polled either for the statistical data or for some other reason and the statistical data is selected to be reported. The line card reports the statistical data in place of reporting a null response in the preferred embodiment whenever possible.

Abstract: A scheduling means for data switching apparatus includes a plurality of input ports and a plurality of output ports, the scheduling means capable of processing a plurality of interconnection requests, each requesting interconnection between a sub-set of the input ports and a sub-set of respective the output ports, and each request having a respective priority level which is one of a predetermined number of priority levels.

Abstract: A transmission apparatus includes a part which sets a resource management information path based on a given network management protocol onto PVC logically set traffic defined in ATM switching so that a customer network management agent process and a user network management system can communicate with each other.

Abstract: In packet communications that utilize header compression/decompression, relatively fast and reliable header compression context updates can be accomplished with relatively low overhead by: sending anticipatory context update requests before decompressor context invalidation is detected; sending redundant context update requests; and sending redundant context updates. Transmission parameters associated with both context update requests and context updates can be controlled appropriately to improve their chances for delivery, and needless context update requests can be identified and ignored at the header compression side.

Abstract: A mobile terminal and method of controlling the same, each that can integrally move between an infrastructure network and an ad hoc network. The mobile terminal can interconnect an infrastructure network and an ad hoc network while moving. In an address management process, a connection network identification process, and a destination address capture process which are needed to establish communications with the terminal connected to a network, an infrastructure network connection procedure is integrated with an ad hoc network connection procedure. The integrated configuration consists of an ad hoc/infrastructure network address management means, an ad hoc/infrastructure integration move management means, an ad hoc/infrastructure network integration destination address capture means. In each process, it is identified whether or not the mobile terminal is connected to an ad hoc network or infrastructure network, so that the procedure corresponding to the connected network is used.