Abstract: A system and method for providing audio communication over a computer network between sending and destination devices using differing communication formats is provided. The system identifies the format of the incoming digital encoded audio data signal, identifies the destination device format of the signal, and converts the data to a second digital encoded audio data signal which is compatible with the format utilized by the destination device.

Abstract: A network interface is presented that receives packet data from a shared medium and accomplishes the signal processing required to convert the data packet to host computer formatted data separately from receiving the data packet. The network interface receives the data packet, converts the analog signal to a digitized signal, and stores the resulting sample packet in a storage queue. An off-line processor, which may be the host computer itself, performs the signal processing required to interpret the sample packet. In transmission, the off-line process converts host-formatted data to a digitized version of a transmission data packet and stores that in a transmission queue. A transmitter converts the transmission data packet format and transmits the data to the shared medium.

Abstract: A communication device comprises reception means for receiving externally supplied first time information representing time, time information generation means for generating second time information representing time, time difference detection means for detecting a time difference between the times represented by the received first time information and the second time information generated at a time point at which the first time information is received, and correction means for correcting the second time information generated by said time information generation means based on the received first time information when the time difference is greater than a predetermined value.

Abstract: The present invention provides an improved RACH access burst arrangement and frame structure. That is, the invention provides methods and apparatus for supporting more than one access burst length in the UMTS access channel structure. Preferably, two access burst lengths are supported, e.g., 5 ms and 10 ms. Such an arrangement is advantageous in applications where it is beneficial to have fast access latency such as, for example, voice or other forms of real-time traffic. Also, the invention provides methods and apparatus for supporting multiple frame sizes. It is to be appreciated that further enhancement to access latency can be obtained by having the UMTS physical layer support multiple frame sizes. The access burst signal transmitted by a remote terminal over the RACH may be an access request or data packets in the case where the RACH is being utilized for UMTS short message services.

Abstract: The management process of the invention is in particular intended for the temporal management of an ARINC 629 bus for avionics rigs, and it is characterized in that the rigs to which new information is not available or to which only inconsistent information is available are made to send substituted information (WS(2), WS(3)) furnished with characteristic identifications (S1, S2) at the send instants (TA) which are assigned thereto.

Abstract: The present invention relates in general to an interface module of an asynchronous transfer mode(ATM) terminal using the ATM for transmitting information, particularly to an ATM interface module having an interfacing function required to ATM communication terminals which supports other services and capable of interfacing with the other upper layer service modules by changing an interface module software according to a respective service type.

Abstract: Multicasting and telephony call signaling are combined to perform multicast call signaling. Several IP endpoints in a packetized network subscribe to a multicast group. A telephony call setup request is then sent on a multicast address to each of the subscribing endpoints in the telephony multicast group. When an originating endpoint transmits a telephony call setup request using the multicast address, the network replicates and transmits the telephony call setup request to each of the subscribing endpoints belonging to the telephony multicast group associated with that multicast address. When the setup request reaches the subscribing endpoints, each endpoint sends an alert signal using the multicast address to indicate the presence of a telephony device at that endpoint. Telephony devices at each of the subscribing endpoints can then begin notifying a user of the incoming call.

Abstract: Method and apparatus for setting up a connection between a first terminal and a second terminal over an Integrated Services Digital Network (ISDN) link having one or more bearer channels that allow a user-selected protocol are provided. The terminals support a plurality of possible software protocols for use on the bearer channels. In order to facilitate new types of ISDN protocols on an existing system, the method includes the step of separating the protocol software into a generic module containing generic ISDN encoding/decoding protocols and into protocol specific modules containing specific types of ISDN encoding/decoding protocols.

Abstract: An interface for communications among network elements of at least one network is provided, comprising at least one transmitter, at least one receiver, at least one processor, and at least one backplane coupled among the network elements. Data frames of a second type, or Time Slot Network (TS Net) data frames, are generated and transferred over the backplane in response to receipt data frames of a first type from the network. The TS Net data frames comprise switching event information. Compare operations are performed among prespecified TS Net data frames at prespecified intervals, and at least one interrupt signal is generated in response to data changes determined by the compare operations. Information routing is controlled over the network by a processor in response to the interrupt signal.

Abstract: A method of and apparatus for controlling data transfer between two stations comprises a link manager for controlling allocation of available channels in a plurality of communications links. In each of the communications links data is transferred between two stations in at least one channel. Data for transfer from a data source is buffered in a data buffer. A controller determines latency in the buffer from the amount of data in the buffer and the rate at which data is being output from the buffer. The controller generates a request for a change in the allocation of channels in a communications link between two stations depending on the latency in the buffer and preset threshold values. The link manager is responsive to a request generated by the controller either to allocate a different number of channels to the communications link or to generate a refusal of the request.

Abstract: In a means for forwarding message cells transmitted according to the asynchronous transfer mode, the message cells of a plurality of blocks are supplied to an interface that supports back pressure of traffic. A 100% utilization of the interface is achieved in that a block only receives an authorization for forwarding a message cell when it has a message cell with payload data.

Abstract: A master controller (28) in a control area network system in a larger control area network (16, 18) may have a plurality of devices (33) coupled thereto. The devices generate data which the master controller directs to a destination device coupled to the same master controller, a different master controller in the same control area network or to a different master controller in a different control area network. The master controller directs the data using a connections table acquired from one or more other master controllers to which the master controller may communicate with.

Abstract: A system and method for communicating screen display images on a computer to another computer using a telephony network. A screen share button on a data network telephone initiates a screen shot request to a first computer associated with the data network telephone. The first computer uses a screen shot application to retrieve the image on the computer display and send it to the data network telephone. The data network telephone receives the screen shot image and sends the image to another data network telephone which is a party to a telephone conversation with the first data network telephone. The first data network telephone preferably uses the SIP invite with a session description protocol that permits the transfer of image data on SIP messages. The second data network telephone implements the image data session description protocol and communicates the screen shot image to the second computer.

Abstract: A common channel communication method for a base station in a mobile communication system including common channels, each of which support at least two data rates. The method comprises determining a data rate of the common channel available in a common channel service state and a frame length serviceable at the determined data rate, transmitting a message including information about the determined data rate and frame length on a specific forward common channel before transmission; and upon receipt of an acknowledge message through a specific reverse common channel, setting a data rata and a frame length of the common channel to the determined values.

Abstract: A first discarding device is coupled to a second discarding device. This first discarding device can be a traffic policer or alternatively a network buffer. The second discarding device is a network buffer. A cell stream is supplied to the first discarding device. The system determines if the incoming cells are in accordance with the predetermined criteria and discards this cell, if this cell is not in accordance with the criterion. By discarding cells of a frame, this frame is corrupted and marked with a corrupted frame indicator, by the first discarding device. Afterwards the second discarding device may discard the remaining cells of the marked frame. If the first discarding device is a traffic policer, the traffic policer checks the conformance of the incoming cells according to conformance criterion and alternatively if the first discarding device is a network buffer it checks the conformance of the incoming cells according to some congestion determining criteria.

Abstract: A system and method in a digital TDMA telecommunication system for evaluating time slot offsets of asynchronously operating transmitters. The transmitters are equipped to receive a common reference clock signal, whereupon the value of the reference clock signal is recorded at transmission of specific time slots. The transmitters then perform a modulo operation on the recorded time and reports the result to a controlling node. Results of the modulo operation may then be compared with similar results reported by other transmission sources to the controlling node to determine relative time slot offsets between the transmission sources.

Abstract: The present invention concerns a packet-processing apparatus and a packet switch adapter for the processing of variable-length packets comprising packet data and packet information. The adapter and/or the apparatus comprises a distributor for distributing the packets to several parallel, identical processing paths, each comprising at least one processing unit, whereto the packets are fed and which is able to process only for one of the packets its packet information at any moment in time. The feeding is interruptable for feeding a different of the packets to another of the processing paths. Furthermore, a packet-processing method for distributing received variable-length packets to several parallel, identical processing paths is disclosed.

Abstract: In a communications network, which may be a broadband optical network, a packet is transmitted from a source node to a destination node on a looped signal path. A return signal, which may function as an acknowledgement of the original signal, is transmitted back to the source node from the destination node in the time slot which was occupied by the original packet.

Abstract: A Multimedia Telecommunications Call Center provides integrated video, audio, data and telephony functionality, together with connectivity to the Internet, ISCN, PSTN, and other wide-area networks. The Call Center includes a Local Area Network having a Gateway and a Gatekeeper. Incoming multimedia calls are received by the Gateway and are permitted onto the network under control of the Gateway and are permitted onto the network under control of the Gatekeeper. Communications between the Gateway and the Gatekeeper preferably take place across the network and comply with the ITU H.323 standard protocol. Communications between the Gatekeeper and the Call Manager preferably take place across the network and comply with the European Computer Manufacturers Association CSTA standard protocol.

Abstract: A wireless communications system employs code-division multiple access information transmission techniques where the uplink and downlink transmission bandwidths are unequal. The higher bandwidth is an integer multiple of the lower bandwidth. The present system requires a base station and a subscriber unit to have two pseudo-random code generators which can be clocked separately. Alignment of the uplink and downlink pseudo-random spreading codes is achieved by truncating the code sequence for the lower speed link at the conclusion of a complete code sequence for the higher speed link.