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| Number | Title | Issue Date |
| 4616359 | Adaptive preferential flow control for packet switching system Flow control of data packets through a packet switching network to reduce congestion is controlled by an adaptive preferential permit packet (APP) processing from an orginating data terminal through each packet switch node of the network to a destination ... | 10/07/1986 |
| 4502116 | Multiple processor synchronized halt test arrangement A hardware and algorithm synchronizing arrangement comprising a subsystem synchronization interface circuit is disclosed for controlling the testing of multiple interconnected processors. The circuit permits the pausing of one processor to cause the other... | 02/26/1985 |
| 4488289 | Interface facility for a packet switching system A communication method and packet switching system in which packets comprising logical addresses and voice/data information are communicated through the system by packet switching networks which are interconnected by high-speed digital trunks with each of... | 12/11/1984 |
| 4486877 | Packet switching loop-around network and facilities testing A communication method and packet switching system in which packets comprising logical addresses and voice/data information are communicated through the system by packet switching networks which are interconnected by high-speed digital trunks with each of... | 12/04/1984 |
| 4408323 | Processor facilities for integrated packet and voice switching A communication method and switching system in which voice and data signals are communicated through the system by a programmed controlled switching processor. The switching processor reads these signals from an input memory where they were transferred fr... | 10/04/1983 |
| 4402008 | Wideband switching architecture A communication method and wideband switching network in which wideband signals are communicated through the network with minimal crosstalk between the wideband signals. Minimal crosstalk is achieved by a network architecture and by grounding both ends of... | 08/30/1983 |
| 4399536 | Convolution filter arrangement for digital multifrequency receiver A digital multifrequency (MF) receiver for use in telephone switching systems is disclosed. Input MF signals in a PCM (pulse code modulation) format are detected by simultaneously computing the convolution of the digital input signal with discrete portion... | 08/16/1983 |
| 4394647 | Voltage monitoring arrangement for ORed power diodes Each power diode in an ORed direct-current power distribution system has connected thereacross, between the respective load and source terminals of the power diode, a series connection of respective first and second light-emitting diodes (LEDs) with the L... | 07/19/1983 |
| 4383315 | Idle time slot seizure and transmission facilities for loop communication system A time division multiplex loop communication system for voice and data is disclosed with multiaccess time slot seizure and data transmission capability from all station nodes without changing the idle, nonreserved, status of the seized time slot. A method... | 05/10/1983 |
| 4371758 | Defective short holding-time trunk identifying method A method is disclosed for automatically detecting a trunk that is likely to be defective even though it passes operational tests incident to switching it into service. In a telephone system, such a trunk might, for example, be so noisy or ineffective for ... | 02/01/1983 |
| 4313035 | Method of providing person locator service A method is disclosed of using the public switched telephone network, including the CCIS (Common Channel Interoffice Signaling) system, to provide nationwide personal locator telephone service for called subscribers. In accordance with the service, a call... | 01/26/1982 |
| 4310726 | Method of identifying a calling station at a call terminating facility A method is disclosed illustratively in an emergency call handling system for automatically providing the identity of a calling station to a call terminating facility, such as a call answering bureau. In response to an appropriate call, a data base is acc... | 01/12/1982 |
| 3982076 | Network control circuit for a time division switching system A network control circuit which allows time division switching systems of different sizes to operate with the same port circuit is disclosed. The time division switching systems utilize a port circuit with a ring counter which controls connection of the c... | 09/21/1976 |
| 3978293 | Ringing control circuitry with shared ringing loop current detector Ringing loop-current detectors are shared by groups of telephone set line circuits. A time division switching system is disclosed having a plurality of telephone line circuits and common control circuits for switching calls over a time division communicat... | 08/31/1976 |
| 3978292 | Ringing control circuitry with shared ringing loop current detector A time division switching system is disclosed having a plurality of telephone line circuits and common control circuits for switching calls over a time division communication bus. Ringing loop current detectors are shared by groups of the line circuits fo... | 08/31/1976 |
| 3973141 | Transistor driver circuit This specification discloses transistor circuitry suitable for use as a switch or as a floating current driver to control the concurrent operation of a pair of utilization devices. The circuitry comprises an NPN and a PNP output transistor which are subst... | 08/03/1976 |
| 3973143 | Bias control circuitry for semiconductor bridge An electronic switch is disclosed comprising a transistor bridge having input and output signaling nodes and bias control nodes. A pair of matched current sources are selectively activated and deactivated in a series arrangement with symmetrical turn-on t... | 08/03/1976 |
| 3973142 | Switch turn off circuitry for semiconductor bridge An electronic switch is disclosed comprising a transistor bridge having input and output signaling nodes and bias control nodes. A pair of matched current sources are selectively activated and deactivated in a series arrangement with symmetrical turn-on t... | 08/03/1976 |
| 3971895 | Ringing control circuitry with shared ringing loop current detector A time division switching system is disclosed having a plurality of telephone line circuits and common control circuits for switching calls over a time division communication bus. Ringing loop current detectors are shared by groups of the line circuits fo... | 07/27/1976 |
| 3967246 | Digital computer arrangement for communicating data via data buses A digital computer arrangement is disclosed including a central processing unit, a plurality of peripheral units coupled to a peripheral bus, a memory access controller, a first memory bus, and a second memory bus. The first memory bus serves a first plur... | 06/29/1976 |
| 3934099 | Bias, feedback and network arrangements for hybrid circuits This specification discloses a time division communication system having a plurality of line circuits for coupling telephones over bidirectional lines to outgoing and incoming time division buses. Each of the line circuits comprises an active hybrid havin... | 01/20/1976 |
