Abstract: The range of digital data communication services, such as a basic rate 2B1Q ISDN channel, to customer premises located beyond the industry standard achievable range of a two-wire loop can be extended by increasing the capacity of the ISDN line code from two information bits per symbol to three information bits per symbol, so as to reduce the effective symbol rate, which is error correction encoded to an effective 4B1H line code for defining a sixteen level PAM signal waveform, and employing enhanced low signal-to-noise ratio signal processing techniques in both the transmitter and receiver to accommodate the increased insertion loss of the two-wire line resulting from its extended length. Such enhanced low signal-to-noise ratio signal processing techniques include a Tomlinson precoder in the transmitter, and an adaptive linear equalizer and a module unit in the receiver.

Abstract: In an asynchronous transfer mode network, a virtual path is established between two subscriber switches through a transit switch. A virtual channel is established between two terminals which are connected to the subscriber switches, respectively. Any one of the subscriber switches detects a command signal sent from a terminal to establish/release the virtual channel. The subscriber switch judges whether or not it is necessary to change bandwidth of the virtual path on the basis of the command signal. The subscriber switch produces a direction signal for directing the transit switch to extend/reduce the bandwidth of the virtual path when the specific subscriber judges that it is necessary to change the bandwidth of the virtual path. The transit switch extends/reduces the bandwidth of the virtual path by a predetermined step in response to the direction signal.

Abstract: A reconfigurable multiwavelength network element includes a first demultiplexer unit for demultiplexing a first multiplexed optical signal from a first optical fiber into a first plurality of optical outputs; a second demultiplexer unit for demultiplexing a second multiplexed optical signal from a second optical fiber into a second plurality of optical outputs; a first multiplexer unit having first optical inputs for receiving signals to be multiplexed together; a second multiplexer unit having second optical inputs for receiving signals to be multiplexed together; and a cross-connect unit having first and second portions, the first portion directing signals received from at least a first one of the first plurality of optical outputs and a first one of the second plurality of optical outputs to a first one of the first optical inputs and a first one of the second optical inputs, the second portion directing signals received from at least a second one of the first plurality of optical outputs and a second one

Abstract: A method for dimensioning link bandwidth for elastic-data traffic for a link in a communications network, in which a number of connections N having elastic-data traffic flowing over a bottlenecked link in a communications network is determined. A transfer rate ?f for each connection is determined for the condition that the communications network is not a constraining resource for the connection. A per-connection bandwidth objective b is determined for elastic-data traffic flowing over the link. Lastly, a link bandwidth B for the link is dimensioned for the elastic-data traffic flowing over the link based on either a mean performance criterion or a tail performance criterion using the determined number of connections N, the determined transfer rate for each connection and the determined per-connection bandwidth objective b.

Abstract: The present invention is directed to a system and process for automatically and dynamically configuring a wireless computer network. Each computer that is to participate in the dynamic network continuously broadcasts its address to any other computer within range of the wireless network hardware. When a computer receives a broadcast message from a machine it is not currently connected to, it can then use any standard communications protocol (i.e., TCP/IP) to establish a connection to the broadcasting machine. Once the connection is established, a message is sent to the broadcasting machine notifying it of the new connection. This allows for either client/server, peer-to-peer, or other communications strategies to be implemented, depending on the application. Upon establishing a new connection between a pair of computers, a data synchronization protocol is employed to exchange data, applications, or configure services.

Abstract: Portions of the internet are embedded onto a transportable media, then delivered periodically to subscribing clients. The contents are indexed to relate a given document to a URL and a time stamp. During on-line access to the internet, the transportable media serves as a read only cache. After issuing a command to view a document at a given URL, a test is performed to see if the document stored on the media is up to date. A command is sent over the internet to identify the date for the most recent update of the document. If the identified date is more recent then the corresponding time stamp, the media version is out of date. So the document is downloaded and displayed. If, however, the time stamp is the same or more recent then the identified date, the document as stored on the media is displayed.