Abstract: In an apparatus, there are provided an IP transmitting and receiving unit for transmitting and receiving an IPv4 packet and an IPv6 packet; an IP header converting unit for performing a mutual conversion of the IPv4 packet and the IPv6 packet by an IP header conversion; a DNS substituting unit for receiving a domain information capturing request sent from an IPv4 terminal or an IPv6 terminal and substituting its process; an IPv4 address capturing unit for capturing an IPv4 address from a DHCP server; and an IP address conversion information holding unit for holding an IPv6 address of the IPv6 terminal and the IPv4 address captured by the IPv4 address capturing unit in correspondence to each other. Thus, a communication with the IPv4 terminal can be executed without preliminarily fixedly allocating the IPv4 address to the IPv6 terminal.

Abstract: A data communications system accommodates high transfer rates of non-isochronous data to and from a communications medium handling isochronous data. The system suitably includes an interface for transmitting non-isochronous data to and from a first system, such as a host system, and transmitting isochronous data to and from a second system, such as a WAN. The interface includes a clear-to-send (CTS) signal generated by the system receiving the non-isochronous data. If the CTS signal is asserted, the sending system continues to provide data to the receiving system. On the other hand, if the CTS signal is deactivated, the sending system withholds the non-isochronous data for the relevant channel until the CTS is reasserted. In an exemplary embodiment, the CTS signal is an out-of-band hardware-implemented signal, which tends to provide optimal simplicity and speed.

Abstract: The ATM exchanges that a plurality of connections are established and a plurality of processes with respect to the plurality of connections having each having a transmission rate arise, the ATM exchange comprising a priority computing circuit which computes a priority of a process, according to a updating frequency of priority assigned to a connection to which the process is associated, a priority comparing circuit which compares a plurality of priorities corresponding to the plurality of processes to select a process having a higher priority among the plurality of processes, and a processing circuit which carries out the selected process.

Abstract: Enhanced operation is attained for packet networks with a performance management operations system (PMOS) that receives information from network elements concerning loads carries and lost packets, receives threshold and other parameter information for a network management console, performs various calculations on the received information, and develops recommendations for setting of adjustable network elements controls that affect the quality of service that those elements provide. For those network elements that are capable of receiving operation control signals from the PMOS and that the network management console ceded a measure of control to the PMOS, the developed recommendations are converted to control signals that are directly applied by the PMOS to the network elements to control the network elements' operations.

Abstract: A communication access chassis having a general purpose computing platform provides communication access between remote users and computer network via the public telephone network. The general purpose computing platform is connected to an internal chassis bus complex transmitting incoming calls between a telephone line interface and a signal conversion system and between the signal conversion system and a local area network interface. The computing platform has a conventional microprocessor and local or peripheral memory storage devices and implements a commercially available open network operating system such as Windows NT™. By virtue of the ability of the general purpose computing platform to run network server programs locally, i.e.

Abstract: A method and apparatus for detecting and diagnosing wireless network failures, provides for capturing, analyzing, and displaying detailed information relative to data packets and/or frames transmitted across a wireless network including an IEEE 802.11 LAN.

Abstract: A wireless communication system includes a number of devices to be clustered for the exchange of data and control message packets. Each node (ON, IN1 to IN5) has a unique address within the cluster and is arranged to accept only messages transmitted to it. A dynamic re-routing technique is provided whereby a message packet (M) not received by its target node is detected and re-routed via one or a succession of other nodes of the cluster until either transmission is successful or a predetermined number of failed attempts has been made. The system provides distributed control and intelligence with intermediate nodes for re-routing being selected randomly and current count values for unsuccessful transmission attempts being included within the transmitted packet.

Abstract: A method for detecting and discarding stale cells following route changes in a data communication network. The data communication network comprises a transmitter, which upon detection of a failure in a route of a network, retransmits data tagged as resent data along a different route of a multi-stage switch; and a receiver, which upon detection of tagged data from the transmitter via the different route of the multi-stage switch, utilizes tagged data for data communications while discarding previously transmitted data that are not tagged to avoid data duplication.