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| Number | Title | Issue Date |
| 7676707 | Device and method for testing SAS channels A device and a method for testing SAS channels which are applied to a plurality of pairs of SAS interfaces. The testing device includes a control terminal, a PCI-E microprocessor, a PCI-E-to-SAS adaptor, and a signal feedback module. The control terminal is used for... | 03/09/2010 |
| 7327781 | Universal intelligent modem In one general aspect, data transfer between the modem and a processor connected to the modem may be improved using a variable speed buffer. The variable speed buffer may include one or more first-in/first out buffers (FIFOs) and two interfaces. The FIFOs may be con... | 02/05/2008 |
| 7320115 | Method for identifying a physical failure location on an integrated circuit A method is disclosed for identifying a physical failure location on an IC without using layout-versus-schematic (LVS) verification tool. In the method, the integrated circuit is tested with one or more test patterns to identify a failure port thereon. Hierarchical ... | 01/15/2008 |
| 7299388 | Method and apparatus for selectively accessing and configuring individual chips of a semi-conductor wafer A method and apparatus according to the present invention enable wafer chips to be configured with a single power on and off sequence and further enable a chip parameter to be adjusted during a wafer test without utilizing that sequence. In particular, each wafer ch... | 11/20/2007 |
| 7296209 | Apparatus for encoding and decoding A communication device which executes proper communications by correcting communication errors caused by noise generated on a transmission line or the like. An encoding device for adding error correction code to an input data sequence is provided with a first code e... | 11/13/2007 |
| 7286980 | Speech processing apparatus and method for enhancing speech information and suppressing noise in spectral divisions of a speech signal A speech processing apparatus and method may identify divisions of a signal spectrum as having a speech component or having no speech component. A comb filter is generated, based on a high-accuracy speech pitch obtained in the identified speech component divisions, ... | 10/23/2007 |
| 7278077 | IBIST test for synchronous lines at multiple frequencies A system for testing a synchronous link utilizing a single test pattern sequence. Components coupled via a link are each configured to generate and check test patterns according to a single repeated test pattern sequence. Test patterns which are generated are based ... | 10/02/2007 |
| 7216268 | Method and arrangement to estimate transmission channel characteristics A channel characteristic of a transmission channel between a remote terminal and a central office is estimated by collecting information in the remote terminal, transferring this information from the remote terminal to the central office and matching the received in... | 05/08/2007 |
| 7200691 | System and method for efficient DMA transfer and buffering of captured data events from a nondeterministic data bus A system and method for efficient transfer and buffering of captured data events. The system includes data capture logic configured to capture data events from a nondeterministic data bus; a system memory including a plurality of addressable locations, where a subse... | 04/03/2007 |
| 7155658 | CRC calculation for data with dynamic header A method for performing CRC calculations on packets with dynamic headers is disclosed. The header may be changed during transmission across a network. When the header is changed, a CRC associated with the header is recalculated such that a residue of the initial see... | 12/26/2006 |
| 7124245 | Data storage system having cache memory manager with packet switching network A system interface having: a plurality of front end directors adapted for coupling to a host computer/server; a plurality of back end directors adapted for coupling to a bank of disk drives; a data transfer section having cache memory; a cache memory manager; and, a... | 10/17/2006 |
| 7076378 | Device and method for providing power line characteristics and diagnostics An apparatus determines a characteristic of a portion of a power line. The apparatus comprises a coupling device in communication with a processor. The coupling device receives a signal from a power line and the processor receives the signal from the coupling device... | 07/11/2006 |
| 7054273 | Circuit integrity in a packet-switched network Techniques for performing a continuity check operation include sending a pattern of bits over a packet network connection through a first interface on a packet network to a second interface on the packet network. The first interface is monitored for return of the pa... | 05/30/2006 |
| 6950972 | Multi-purpose BER tester (MPBERT) for very high RZ and NRZ signals A multi-purpose bit error rate tester (MPBERT) and a method of bit error rate (BER) testing of electrical and optical components and subsystems of electrical and optical communications systems is provided. The invention provides for bit error rate testing both in th... | 09/27/2005 |
| 6904550 | Velocity enhancement for OFDM systems An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for transmission in a packet. A prescribed pattern of OFDM data symbols are remove... | 06/07/2005 |
| 6813741 | Address counter test mode for memory device A memory having a circuit including a built-in address counter with a test mode. The address counter may be used to generate the memory array addressing for the different array test patterns. The circuit may comprise a logic circuit and a counter circuit. The logic ... | 11/02/2004 |
| 6798830 | Methods and apparatus for generating a test signal for xDSL devices A system, method and apparatus are disclosed for generating a test signal by selecting a set of frequencies for the test signal and selecting frequency sub-groups from the set of frequencies. The system generates a respective sub-group composite signal for each freq... | 09/28/2004 |
| 6640318 | Continuity testing in communication networks A communication hub for providing continuity testing in communication networks. The communication hub comprises a processor coupled to an interface. The processor is configured to process a continuity test instruction to generate a request for continuity ... | 10/28/2003 |
| 6584580 | Processor and multiprocessor system For use in a multiprocessor system in which a plurality of processors share a main memory via a processor bus, an error processing unit (EU) that determines an error level is provided in each processor. When an L2 cache control unit (SU) that controls an ... | 06/24/2003 |
| 6563867 | Arrangement for analyzing the nonlinear properties of a communication channel An arrangement to analyze the nonlinear properties of a communication channel that uses a test signal having a number of tones. The test signal is transmitted via the communication channel to be evaluated. For the individual tones of the test signal, equi... | 05/13/2003 |
| 6499126 | Pattern generator and electric part testing apparatus A pattern generator that generates a test pattern used for testing an electric part including: a pattern memory that stores test pattern information, which defines the test pattern; a vector memory that stores a vector instruction, which indicates an orde... | 12/24/2002 |
| 6434716 | Network link tester device configured to selectively and automatically couple to a network transmit pair line or a node transmit pair line of a LAN port and determine available operational modes A network link tester couples to a LAN port with the LAN port having both a network transmit pair and a node transmit pair line. The link detector scans the network transmit pair and node transmit pair lines for the presence of link signals. Upon finding ... | 08/13/2002 |
| 5463633 | Use of at commands to test modem with HP3065 A modem is tested using HP3065 with AT commands. The modem is tested as a whole, thereby assuring that the correct components are being used and that they will work with one another.... | 10/31/1995 |
| 5363493 | Token ring network test device using finite state machine A system that monitors a local area network by receiving all messages transmitted over the local area network, and analyzing selected sequences of messages to determine if certain, architecturally defined, processes are properly completed. If a network st... | 11/08/1994 |
| 5337306 | Digital tandem channel unit interface for telecommunications network A digital tandem channel unit installable in an intermediate central office of a digital carrier telephone network maintains the digital format of the T1 traffic in the course of a DS0 tandem cross-connect, so as to eliminates the possibility of corruptio... | 08/09/1994 |
| 5161151 | System and method for controlling multiplex communications between master station and slave stations A system and method for controlling multiplex communication between a master station and a plurality of slave stations, in which a predetermined signal (dummy signal) is transmitted to the plurality of slave stations via a communication circuit (serial bu... | 11/03/1992 |
| 5138609 | Automatic channel switching from fallback channels to regular channels In a channel switching system, first and second stations are normally interconnected through first and second regular channels and switched to fallback channels established by a public switched network in the event of a fault in the regular channels. In t... | 08/11/1992 |
| 4979506 | Self-test system and method for external programming device A communication system includes self-test means for automatically testing its performance. The communication system is adapted for use between an implantable device, such as a pacemaker, and an external device, such as the pacemaker's programmer. The comm... | 12/25/1990 |
| 4918623 | Testing the performance of a communication line between two modems using modem processor Apparatus for testing the performance of a communication line that carries customer data between two modems, including a programmable processor (for example, a digital signal processor) in each modem that either performs modulation or demodulation of cust... | 04/17/1990 |
| 4807274 | Telephone line quality testing system A telephone line quality testing system detects line echoes in the telephone connection between two subsystems in a message transmission system. The test for line echoes is performed while the two subsystems exchange identification data by transmitting DT... | 02/21/1989 |
| 4633411 | Link quality analyzer A link quality analyzer measures the link quality between a calling station and a called station by continuously transmitting a plurality of signal tones. The called station receives the plurality of transmitting tones and sample them. A power spectrum is... | 12/30/1986 |
| 4630268 | Communication circuit loopback test apparatus To perform a loopback condition for testing purposes, the present apparatus supplies a null signal from an end terminal on a communication link through a set of repeater stations to reinitialize the repeater stations. It then sends N+1 pulses of a frequen... | 12/16/1986 |
| 4606044 | Adjusting data transmission rate based on received signal quality A data transmission control system for allowing remote transceiver stations to transmit data via a telephone line or like analog transmission line through modems. When transmit and receive stations have been interconnected by a call, a training sequence f... | 08/12/1986 |
| 4546473 | Random pattern self test design A PLA is constructed to improve random testing. Section circuits are provided that permit disabling sections of the output lines that are called segments so that the circuit can be tested one segment at a time. Selection circuits are also provided for ena... | 10/08/1985 |
| 4539683 | Method and apparatus for checking analog-to-digital converters, digital-to-analog converters, or telecommunications transmission links which contain such converters The test specimen is charged with an analog, preferably sinusoidal periodic test signal or, respectively, with the digital samples of such a test signal, whereby a numerical relationship exists between the period of the test signal and the system-inherent... | 09/03/1985 |
| 4417337 | Adaptive multitone transmission parameter test arrangement Accurate and reliable measurements of transmission parameters, e.g., envelope delay distortion or frequency response, of a network or facility (105) are obtained in a test system (FIG. 1) employing digital data acquisition units (121) by utilizing a uniqu... | 11/22/1983 |
| 4413335 | Fault recovery apparatus for a PCM switching network This fault recovery system determines the integrity of a duplex digital PCM switching network. The two copies of the switching network operate in synchronization and comparison of the outputs of each copy of the switching network takes place in order to d... | 11/01/1983 |
| 4410986 | Error and status detection circuit for a digital regenerator using quantized feedback A digital regenerator line includes in each station a status and error detection arrangement having an error detection circuit (64) responsive to a filtered composite output signal (101) from a low-pass filtered output from a digital regenerator (30) usin... | 10/18/1983 |
| 4352182 | Method of and device for testing the quality of digital speech-transmission equipment A device for analyzing the quality of digital speech-transmission equipment, specifically a speech coder, comprises generators of white-noise signals, sinusoidal signals, frequency-shaped signals and artificial speech-like signals connected to the coder a... | 09/28/1982 |
| 4301536 | Multitone frequency response and envelope delay distortion tests Accurate and reliable measurement results are obtained in a test system (FIG. 1) employing digital data acquisition units (121) when measuring frequency response or envelope delay distortion of a network or communication facility (105) by employing a uniq... | 11/17/1981 |
