Abstract: An apparatus and method for providing a translation layer between a local bus and a global bus is described. The apparatus has a local bus and a global bus respectively coupled to a local bus gateway and a global bus gateway. A storage unit is coupled to both of the gateways, the storage unit having a traffic unit. Traffic control logic is coupled to at least one of the gateways and to at least one traffic statistic register.

Abstract: In an electronic system for the transmission of data between a number of stations, sub-system operation can be achieved by a suitable choice of signal levels and wake-up levels, so that some of the stations can communicate with one another while other stations are in a sleep mode in which power is saved.

Abstract: A system and method for communicating data between a user connected to a subscriber line and a data network comprising a first module connected to the subscriber line and a second module, physically separate from the first module, connected to the data network. The first module includes a signal converter for converting analog signals received from the subscriber line to a digital signal for sending over an interconnection path to the second module. The second module includes a modulator/demodulator for converting the digital signal to data packets. The first module may be pooled with M first modules and connected over a shared interconnection path to N second modules. The interconnection path may be concentrated to permit communication of signals from those first and second modules communicating user data at any given time.

Abstract: A communication system between head-ends and end-users is provided which expands bandwidth and reliability. A concentrator receives communication signals from a head-end and forwards the received communication signals to one or more fiber nodes and/or one or more mini-fiber nodes. The concentrator demultiplexes/splits received signals for the mini-fiber nodes and the fiber nodes and forwards demultiplexed/split signals respectively. The mini-fiber nodes may combine signals received from the head-end with loop-back signals used for local medium access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and/or fiber node and transmitted to the concentrator. The concentrator multiplexes/couples the mini-fiber node and the fiber node upstream signals and forwards multiplexed/coupled signals to the head-end.

Abstract: An arrangement is provided for selective completion indication of controller events. Data to be transmitted is read and transmitted upon receiving a request for transmission. A completion indication assiciated with the status of the transmission is returned only when a request for the completion indication is received.

Abstract: A CDMA receiver (500) minimizes the use of hardware by taking advantage of the fact that Walsh sequences of a predetermined length (e.g., 16) are comprised of inverted and non-inverted versions of smaller length (e.g., 4) sequences. The receiver (500) performs the necessary uncovering operations for example of a Walsh sequence of length 16 by performing uncovering operations using smaller length Walsh sequences such as of length 4 and then performing subsequent summing operations with inverted and non-inverted versions of the results of such uncovering operations.

Abstract: An exchange connects terminal equipment each having terminal identifier information. A layer 3 control unit of the exchange generates a pseudo layer 3 global reception call; and a layer 2 control unit of the exchange terminates the global reception call at the terminal equipment, extracts before link establishment the terminal identifier information of the terminal equipment from a logical link establishment request frame sent from the terminal equipment in response to the termination, and notifies the terminal identifier information to the layer 3 control unit. The layer 3 layer control unit holds the terminal identifier information notified for subsequent termination of calls to the terminal equipment. By this means, matched terminal identifier information is maintained between the exchange and subscriber terminal equipment.

Abstract: A communication system (300) comprises interfaces (311-314) at communication channels (361-364, respectively), coupled to a controller (340) by an address bus (320) and multiplexer (380). The interfaces (311-314) receive data cells and provide status signals (e.g., clav) indicating, for example, cell availability, independently from interface addresses (ADDR) being present at the address bus (320). The interfaces (311-314) continuously send the status signals to the multiplexer (380) which receives the interface address (ADDR) at a control input (386) and forwards the status information of the currently addressed interface to the controller (340).

Abstract: Disclosed is a way of enhancing capabilities of an interface, such as a communications bus (100), while retaining backwards compatibility of the interface. The bus has a plurality of signal lines (250) including critical control signal lines. Legacy devices (102-103) present a legacy interface to each other over the bus by communicating with each other via a legacy protocol (251) over the bus. Critical control signals of the legacy protocol are conveyed by the critical control signal lines. New devices (104-105) present an enhanced interface to each other over the same bus by communicating with each other via an enhanced protocol (252) over the bus. Control signals of the enhanced protocol are conveyed by signal lines other than the critical control signal lines for the legacy protocol, so that the critical control signal lines remain idle or invalid for the legacy protocol.

Abstract: Methods and apparatus for supporting multiple UTOPIA bus masters on a single UTOPIA bus include coupling two UTOPIA bus masters via three signal lines (Ready, Request, and Grant), designating one of the masters a primary master and the other a secondary master, and coupling both bus masters to the same UTOPIA bus. When receiving cells from the UTOPIA bus, both masters accept cells and screen them (with a lookup table) to determine which cells are addressed to them. When transmitting cells, the primary master normally controls polling and PHY selection. The secondary master asserts the Request line during polling to indicate that it has a cell to send to a PHY that has responded positively to the polling. In response to the Request signal, the primary master asserts the Grant line and control of the bus is given to the secondary master for the next cell cycle. The presently preferred embodiment utilizes an arbitration scheme to assure fairness in allocating control of the bus.

Abstract: A communication control system and method comprising, in one embodiment, a master station connected to a slave station using two redundant buses, wherein command frames having the same content are sent out to the buses and the communication process is changed depending on whether or not the contents of the command frames, when received by the a receiving station, are identical. In another embodiment, a plurality of units are connected to each bus in a multi-drop configuration, and a line length of each bus is defined so that reflected signals from other units reach a receiving unit on each bus after the transition period of a received signal at that receiving unit ends. In still another embodiment, a unit is connected to each bus and the unit is provided with a driver IC, wherein transmission data is first encoded into bit signals having a fixed number of bits, then the signals are supplied to the driver IC.

Abstract: An integrated circuit that includes an improved architecture that reduces the interface between different blocks by minimizing the wire connections between the two blocks. Specifically, the two blocks are structured to transfer data between the two blocks using only the data bus and a common clock, thus eliminating the need for an address bus. Each block contains data registers used for storing data. The data registers in one block correspond to the registers in the second block, with each block being aware of the memory structure of the other block. When one block needs data from the data registers of the other block, it requests the data and the sending block places the contents of its data registers on the bus sequentially. The requesting block reads the data from the data bus at the appropriate time by counting the number of clock cycles from the time that the data was requested.

Abstract: A data communication bus and method of operation thereof, including a plurality of nodes connected to a respective plurality of media segments. A typical node includes an output port coupled to a media segment that it exclusively controls. And an input port coupled to a media segment that is exclusively controlled by another node of the bus. Each media segment typically includes a plurality of high speed data channels such as electrical transmission lines.

Abstract: A method and system for extending a plurality of sub-interfaces of a router port of a wide area network access device to a plurality of user networks using a transport network is provided. The transport network comprises a plurality of network nodes coupled together by one or more data communication paths wherein at least one of the network nodes comprises an access device. The access device includes a plurality of router port extension functional units wherein each router port extension functional unit is coupled to one of the user networks. Each router port extension functional unit comprises a virtual channel agent and a LAN agent. Each router port extension functional units has an associated virtual port, and all of the virtual ports are multiplexed to a single LAN communication port.

Abstract: A communication system (500) comprising a plurality of devices (101-106) interconnected via a bus, the bus being capable of handling isochronous and asynchronous transmissions. A status manager (105) periodically broadcasts status information on the bus in asynchronous transmissions. Devices (101-106) can send status information to the status manager (105) so it can broadcast it over the bus. Information is sent at a reduced frequency, which saves bandwidth. This information can be about the network topology of the communication system (500), about capabilities of a device (101-106) in the communication system (500), about available bandwidth on the bus, or about the strength of a level of attachment between a mobile device (520) and a base station device (106) in the to communication system (500). In a preferred embodiment, the status information is embedded in the Cycle Start (CS) packet.

Abstract: A method and apparatus for providing multiple interactive video teleconferencing sessions over a standard ISDN line is described. Multiple sets of audio, video, and data information are generated and transmitted to a bandwidth allocation device which determines what portion of that information will be transmitted over the ISDN line. Additionally, priority request values are generated that assist the bandwidth allocation device in performing its allocation function such that users interacting with the audio, video and data generation sources will experience acceptable levels of interaction even when bandwidth demand is greater than the supply.

Abstract: A multi-host subscriber loop (10, 70) includes N central office terminals (22-26, 78) coupled to a local exchange (20, 76), where one of the N central office terminals (22, 110) is directly coupled to all other central office terminals (24-26, 112-114). M remote terminals (40-46, 100-104) are coupled to a plurality of telephone service subscribers. A single network facility (16, 76) is coupled between the M remote terminals and N central office terminals. The single network facility concentrates subscriber traffic, control information and associated signaling onto one message structure (60, 140). Messages in this message structure are transmitted between the remote terminals and central office terminals. The message structure includes a plurality of time slots, a first predetermined number of the time slots being allocated to N control channels, at least one time slot being allocated to associated signaling, and remaining time slots being allocated to subscriber traffic.

Abstract: A dedicated bandwidth switch backplane has efficient receive processing capable of handling highly parallel traffic. Packets must pass a filtering check and a watermark check before the receive port is allowed to release them to a queue. Highly efficient algorithms are applied to conduct the checks on the packets in a way which expedites receive processing and avoids contention. A hybrid priority/port-based arbitration algorithm is used to sequence filtering checks on pending packets. A watermark comparison algorithm performs preliminary calculations on the current packet using “projected” output queue write addresses for each possible outcome of the queueing decision on the preceding packet and using the actual outcome to select from among preliminary calculations to efficiently address the outcome-dependence of the current packet's watermark check on the queueing decision made on the preceding packet.

Abstract: An audio information reproducing apparatus for reproducing audio information on a recording medium, which can be connected with a bus. In the medium reproducing control information for controlling a reproducing mode of the audio information and the audio information are recorded. The reproducing control information has an amount of information larger than that capable of being inserted into one information unit formed during transmission via the bus. In the apparatus a detecting device detects the audio information and the reproducing control information from the medium. Then, a generating device generates corresponding information indicating a corresponding relationship between the audio information and the reproducing control information.

Abstract: The problem is to facilitate alteration of a transmission line in the case where the target device establishes a connection on the bus and thereby secures a transmission line in order to transmit stream data in a network of the IEEE 1394 scheme or the like. Stream data outputted from an output device 1 connected to a predetermined network is received by an input device 2. When the output device or a different device has sent an order for setting so that output data of the output device 1 may be inputted to a data input section 2b of the input device 2, the input device 2 conducts input setting based on the order. In addition, when the device which sent the order has sent an order to cancel the input setting, the input device 2 conducts processing of canceling the input setting.

Abstract: A method and related apparatus for concurrent transmission and reception of at least one analog voice telephone signal and at least one ISDN service signal between a first location and a second location over a single twisted pair using a digitally encoded signal that is selected from the group consisting of 2B1Q and 4B3T signals. The method further includes the steps of sending line power over the single twisted pair, transferring the digitally encoded signal to the second location over the single twisted pair, and detecting non-operation of the digitally encoded signal between the first location and the second location to thereby impose a bypass lifeline and provide the analog telephone signal at the second location over the single twisted pair. The method also includes the step of providing the ISDN signal and the analog telephone signal at the second location over the single twisted pair when the non-operation is not detected.

Abstract: The invention relates to a data transmission method and a data transmission arrangement implementing the method. The data to be transferred is digital and consists of bits, the value of which is determined using voltage. In the solution, an electric current corresponding with the digital value of the data to be transmitted is formed in a current converter (3004, 3024) which is transferred on the bus (310, 312). The original digital data is restored from the electric current after data transmission using a reverse current converter (3006, 3022).

Abstract: Improved methods and arrangements are provided for supporting multiple simultaneous isochronous data transfers in a stream pipe of a Universal Serial Bus (USB). The stream pipe is subdivided into a plurality of channels. Devices requiring isochronous data transfers over the USB are dynamically assigned to use a particular channel as defined and mapped using a channel assignment message. In this manner, a plurality isochronous data transfers can be accomplished simultaneously within a single stream pipe. The improved methods and arrangements can be advantageously applied to computer telephony systems that need to support a plurality of user access devices and/or connect to multiple external telephone lines.

Abstract: A medium access controller for a multi-user network that assigns or changes the operating protocol of multiple upstream channels according to user loading, user status, and/or type of payload data transfers requested by the user or detected by the controller. One group of upstream channels utilizes a contention-only protocol for non-responding or off-line users, a second group utilizes a limited type polling protocol for users requiring only brief transfers of payload data, and a third group utilizes an exhaustive polling protocol user requiring large amounts of payload data transfers. Limited type polling provides low latency for quick response to accommodate multiple users, while exhaustive polling provides large data throughput at the expense of latency. Additional levels of limited or exhaustive polling may be employed to accommodate a larger variety of users needs.

Abstract: A Scalable Multimedia Network providing integrated networking of data, voice, video and image services over a variety of access facilities including metallic loops, fiber/coax or digital fiber is disclosed herein. The SMN establishes customer initiated switched virtual circuits for all traffic types and directs them to the appropriate backbone network. The SMN is based on a distributed switching platform that includes a protocol adaptation capability which permits communications between customer premises equipment and potentially incompatible backbone networks or network servers.

Abstract: There is disclosed, for use in a processing network containing a first node operable to transmit and receive frame relay data and a second node operable to transmit and receive asynchronous transfer mode (ATM) data, a network interface for converting the frame relay data to ATM data comprising: 1) a frame relay interface circuit operable to receive the frame relay data from the first node; 2) an ATM interface circuit operable to transmit the ATM data to the second node; 3) a data bus for coupling the frame relay interface circuit and the ATM interface circuit, the data bus operable to transfer frame payload data from the frame relay interface circuit to the ATM interface circuit; 4) a data traffic controller operable to receive frame header data from the frame relay interface circuit and control transfers of the frame payload data from the frame relay interface circuit to the ATM interface circuit; and 5) a bridge for coupling the data traffic controller to the data bus, the bridge isolating the data traffic

Abstract: The communication system has a plurality of subscribers connected through respective interface circuits to a ring feeder for the common transmission of digital source data and control data. The source data and control data are transmitted in a format which prescribes a pulsed sequence of individual bit groups of equal length. The bit groups are subdivided into component bit groups each forming a data channel. At least one date channel is provided for control data which are transmitted in data packets with a destination address. Furthermore, the interface circuit of each subscriber contains an address decoder. The communication system is simplified, and changes to the system are made easier in that at least one subscriber has a special address by means of which a received data packet is fed directly to an instruction decoder inside the interface circuit, which decodes to the bit base an instruction code contained in the data packet. The interface circuit, i.e.

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 method and arrangement for transmitting multiple copies of a frame from a network switch in a packet switched network stores a single copy of the frame received at the switch into external memory. The frame is stored at a location in memory pointed to by a frame pointer. In queuing multiple transmissions of the stored frame in the switch, the frame pointer, and not the frame itself, is replicated and queued for transmission in the network switch.

Abstract: A method for enhancing the functionalities of a subscriber terminal unit (STU) or ADSL terminal unit (ATU) through the use of different types of application interface modules (AIMs). This is accomplished by incorporating a slot in the STU/ATU through which a detachable AIM can be inserted and electrically coupled to the STU/ATU. The STU/ATU has circuitry for determining which particular type of AIM has been inserted. Depending on the type of AIM that has been inserted in the STU/ATU (e.g., installation, telephony, diagnostics, network interface, television, etc.), management information specific to the particular AIM is sent by the STU/ATU upstream to the headend unit. In response, the headend unit provides applications service(s) to the STU/ATU, depending on the particular type of device inserted into the subscriber terminal unit.

Abstract: A computer telephony integration exchange system in which the user can easily use the functions of function codes even though he/she does not know the relevant function codes of the simple digital exchange system.

Abstract: A system for interfacing a plurality of analog telephones to an integrated services digital network (ISDN) line of telecommunications network is disclosed. The system comprises a plurality of line interface units connected to respective telephones and a distribution line, and a communications controller interconnects the distribution line and the ISDN line. The communications controller transmits digital data frames on the distribution line, each frame having a frame start and a plurality of control channels and voice channels of which respective voice and control channels are associated with respective line interface units. The controller can instruct each line interface unit on the control channel of that unit, to issue ringing voltage, dial tone, busy tone or ringing tone, and it selectively couples the voice channels to the ISDN line.

Abstract: In current voice telephony, CATV, and wireless networks, traffic is channelized for both access and transport. This channelization is wasteful of resources where multiple services have varying demands for bandwidth and holding times, or a service generates traffic that is bursty in nature. The invention solves these problems by providing flexible and adaptable multi-service access to the networks. Customer requirements are checked by monitoring traffic on a local access at a connection request and/or during the established connection, and the local access is configured according to the transmission requirements. The local access can also be configured in response to the network information. In further realizations, either or both the CPE connector and access module include common bus architecture which forms a backbone LAN for handling a multiplicity of CPEs and/or networks.

Abstract: The arrangement is for coupling optional additional equipment to terminal equipment of private branch exchanges via an additional equipment interface, particularly according to the ETSI standard. The terminal equipment has an option bus via which arbitrary additional equipment can be connected. An additional equipment driver specific to the additional equipment and that represents the additional equipment interface is provided in the private branch exchange. The terminal equipment provides a communication channel between the additional equipment and the additional equipment driver in the private branch exchange via which the additional equipment and the additional equipment driver communicate according to a protocol specific to the additional equipment.

Abstract: A multi-host subscriber loop (10, 70) includes N central office terminals (22-26, 78) coupled to a local exchange (20, 76), where one of the N central office terminals (22, 110) is directly coupled to all other central office terminals (24-26, 112-114). M remote terminals (40-46, 100-104) are coupled to a plurality of telephone service subscribers. A single network facility (16, 76) is coupled between the M remote terminals and N central office terminals. The single network facility concentrates subscriber traffic, control information and associated signaling onto one message structure (60, 140). Messages in this message structure are transmitted between the remote terminals and central office terminals. The message structure includes a plurality of time slots, a first predetermined number of the time slots being allocated to N control channels, at least one time slot being allocated to associated signaling, and remaining time slots being allocated to subscriber traffic.

Abstract: An interface device serving as a bridge between a telephone-based bus with a plurality of TDM channels and a high speed data network to permit mixed data, voice, and video signals to be exchanged between the telephone bus and the data network, comprises a serial port for connection to the telephone bus; a parallel port for connection to the high speed data network; a bidirectional serial-to-parallel/parallel-to-serial converter connected to the serial port; and a rate converter circuit between the bidirectional converter and said parallel port, the rate converter circuit including a time-slot interchange device to permit rate adaptation with constant throughput delay and switching between the TDM channels.

Abstract: A communications interface is used in a telecommunications network station which including a number of network elements, a controller for controlling the network elements and an internal bus interconnecting the controller and the network elements. The controller operates as a busmaster on the bus and each of the network elements operates as a slave on the bus. The communications interface has a pool of buffers for temporary message storage and a polling function for temporarily storing a message received from the bus in a buffer and/or for taking a message from a buffer for transmission over the bus. A binary sequence number is inverted for a reply if a received message is valid, otherwise it is not changed for the reply. A message is re-sent when the sequence number in a reply has not changed.

Abstract: A scalable Multimedia Network providing integrated networking of data, voice, video and image services over a variety of access facilities including metallic loops, fiber/coax or digital fiber is disclosed herein.The SMN establishes customer initiated switched virtual circuits for all traffic types and directs them to the appropriate backbone network. The SMN is based on a distributed switching platform that enables carriers to economically provide service to a small number of customers and add capacity incrementally as the customer base increases. The platform has a protocol adaptation capability which permits communications between customer premises equipment and potentially incompatible backbone networks or network servers.

Abstract: Communication system (KS) having a user facility system (LMS) for the realization of user facilities and having a switching system (VS) for setting up and clearing down connections between connected subscriber terminal equipment (TE) and for reporting switching-oriented events as well as user facility activation and user facility deactivation requests to the user facility system (LMS). The user facility system (LMS) has a plurality of user facility modules (LMB) and a user facility executive sequencer (LMAS) communicating therewith. The user facility modules (LMB) can call user facility development modules made available by the user facility executive sequencer (LMAS). Messages from the user facility executive sequencer (LMAS) about switching-oriented events occurring in the switching system (VS), is a facility activation and user facility deactivation messages as well as data input by subscriber terminal equipment (TE) are respectively communicated to a specific user facility module (LMB).

Abstract: Methods and apparatus providing for a switching hub in which an asynchronous transfer mode (ATM) switch is utilized as a backplane bus to which a plurality of LAN and ATM modules are coupled. Each LAN or ATM module is an autonomous switching module. Thus, for example, an Ethernet LAN module may receive Ethernet packets on one of its ports and transmit the packets out another one of its ports according to well known standards and techniques for bridging such packets, without the need for such packets to be translated into ATM cells and transmitted across the ATM switch backplane bus.

Abstract: A plurality of digital telephones 2A, 2B are provided in direct multiple connection with a digital line 4 introduced from a private branch exchanging system. Each of the digital telephones 2A, 2B sends a burst signal containing its own telephone call data, and burst signals from the telephones 2A, 2B are combined into a single burst signal on the digital line 4 to transmit communication data of the telephones 2A, 2B in the form of the single burst signal to the private branch exchanger 1.

Abstract: A multi-port LAN switch is provided that enables attached network devices to both communicate directly and to insert into a token-ring network through an attached concentrator. Each port of the multi-port LAN switch has a first transformer, a second transformer, and a switching system. The first transformer has a first winding connected to a first connection of the port. The second transformer has a first winding connected to a second connection of the port. The switching system switches to a port mode or an adapter mode as a function of a mode signal transmitted to the port. In the adapter mode, the switching system connects a second winding of the first transformer to a transmitter circuit in the port, and its connects a second winding of the second transformer to a receiver circuit in the port.

Abstract: The invention provides a bus line traffic control adapter apparatus which can secure a communications throughput of a data terminal which is already in a communicating condition even where there is a limitation in transfer capacity on a bus line. A first packet controller extracts throughput information in call user data in a call request packet. A traffic controller subtracts a current throughput value read out from a total throughput control section from allowable throughput information on a bus line, compares a value obtained by the subtraction with the throughput information notified from the first packet controller, and permits or rejects origination of a call in accordance with a result of the comparison. When a notification of rejection of origination of a call is received, the first packet controller cancels the received call request packet then and notifies a clear indication packet to the data terminal by way of a second ISDN control section.

Abstract: A computer interconnection backplane bus. The interconnection backplane bus is formed by bus transmission lines and component connection transmission line sections that interconnect components of the computer. The characteristic impedance of the bus transmission lines is stepped so that the number of impedance mismatches on the interconnection bus is minimized. The components of the computer are connected to the bus at the interconnections nodes of the bus transmission lines through terminated component connection transmission line sections. The impedance mismatches that exist on the interconnection backplane bus are strategically placed so that the distortion to a transitioning voltage level edge is in the form of overshoot rather than under shoot or ringing.

Abstract: In a communication system having a plurality of communication apparatus connected to at least one line, each communication apparatus has detection circuitry for detecting a call signal from the line to other communication apparatus and inform circuitry for informing such call or circuitry for altering such call to a call to its own apparatus.