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2017

19602247Method and device for retransmission
29600372Approach for controller area network bus off handling
39596676Calibration of a downlink transmit path of a base station
49596041Noise localization within cable based communication systems
59590774Circuit for introducing signal jitter
69584268Device level enablement of a communications protocol
79577797System and method for the detection and remediation of non-responsive customer premises equipment
89569396Interface with variable data rate
99558054Apparatus and method for detecting errors on a transmission path
109544910Communications system
119544103Differential wired communication link quality detector and differential wired communication link quality detection method
129544091Bandwidth control for differential manchester encoding auto-negotiation signaling
139544071Margin test methods and circuits
149537618Systems and methods for differential pair in-pair skew determination and compensation
159537617Receiver clock test circuitry and related methods and apparatuses
169537590Synchronization of communication equipment

2016

179521070Apparatus, information processing method and information processing system
189515809Testing using analog near end loop back circuit
199509444Efficient checksum communication between devices
209503228Systems and methods to detect, diagnose, and mitigate issues in multi-layer networks
219491646Measuring device and a method for measuring a signal with several component signals
229485677Determining hearability in a heterogenous communication network
239483340Estimating bit error rate
249479649Method and system for call data analysis
259479637Systems and methods for establishing a diagnostic transmission mode and communicating over the same
269473275Gain asymmetry characterizing circuit and method for determining characteristics of gain asymmetry possessed by transmitter
279450747Soft decision analyzer and method
289450686Testing an upstream path of a cable network
299444560Method and apparatus for IQ imbalance estimation
309432133Vector signal generator channel characterization employing orthogonal modulation
319425907Loopback-based built-in-self-test
329423443System and method of detecting and locating intermittent and other faults
339413583Calibrating RF path delay and IQ phase imbalance for polar transmit system
349413497Bit error pattern analyzer and method
359401782Test system and a test method for determining processing parameters of audio and/or video data
369391794Generating worst case test sequences for non-linearly driven channels
379379855Method and apparatus for a remote modular test system
389374194Transmission system error detection and correction system and method
399369231Dynamic adjustment of transfer characteristics as a function of channel characteristics
409363046Measuring impairments of digitized signals in data and timing recovery circuits
419363035Method for testing the transmission modes of a radio device
429356743Method and apparatus for evaluating and optimizing a signaling system
439350573Apparatus and method for reducing discontinuities between waveforms in a communication system
449350499Carrier aggregation testing method and apparatus for performing the same
459344219Increasing communication safety by preventing false packet acceptance in high-speed links
469344203Distortion measurement for limiting jitter in PAM transmitters
479338282Data processing in a digital subscriber line environment
489332552Frequency agility for wireless embedded systems
499331793Controller for network having substantially fixed topology
509325459Radio frequency communication
519319887Methods and apparatus for wireless coexistence based on transceiver chain emphasis
529319512Systems and methods for establishing a diagnostic transmission mode and communicating over the same
539319187Method and a device for relaying in a communications network
549301171Methods, test systems and arrangements for verifying compliance with requirement specifications
559300444Wideband quadrature error correction
569298668Bit error rate reduction buffer, method and apparatus
579293075Display apparatus and control method thereof
589282470Method and apparatus for detecting radio link failure in wireless communication system
599271159Methods, systems, and computer readable media for testing a diameter routing node
609264533Systems and methods for establishing a diagnostic transmission mode and communicating over the same
619264188Apparatus and a method for determining information on an amplitude error of a transmit signal
629246643Method of determining an error rate and a suitable testing device
639244126Automated test system with event detection capability
649236978System and method for information verification based on channel awareness
659231740Transmitter noise in system budget
669231715I/Q mismatch compensation method and apparatus
679229831Test device and method
689226701Error detection in critical repeating data in a wireless sensor system

2015

699226184Estimating and utilizing client receive interference cancellation capability in multi-user transmissions
709215063Specifying a 3-phase or N-phase eye pattern
719215047Signal processing device and method by use of wireless communication
729215046Fault diagnosis device for multiplexer
739215045System and method of detecting and locating intermittent electrical faults in electrical systems
749214232Methods and apparatuses for calibrating data sampling points
759210025Method and apparatus for correcting in-phase signal and quadrature-phase signal
769209948Testing a decision feedback equalizer (`DFE`)
779197532Communication analysis apparatus and communication analysis method
789191066Systems and methods for loop length and bridged tap length determination of a transmission line
799179142Image processing apparatus and inspecting method thereof
809178668Method and apparatus for detecting improper connections near a customer premises equipment
819178647Interface with variable data rate
829172498Controlled noise injection in transmitter for noise margin testing
839166750Soft decision analyzer and method
849166749Serial data transmission system and method
859160590Diversity with a coded signal
869160498Transmission unit and diagnosis method
879158642Method of testing multiple data packet signal transceivers concurrently
889154271Method and apparatus for a physical layer device (PHY) to determine a status of a link in a network
899148264Data transmission method, device and system
909148234Technique and test signal for determining signal path properites
919143267Low complexity and power efficient error correction coding schemes
929135480Multi-protocol or multi command RFID system
939116810Margin test methods and circuits
949100182Digital communications test system for multiple input, multiple output (MIMO) systems
959094842Systems and method for orthogonal frequency divisional multiplexing
969094290Measuring and displaying bandwidth contention
979092386Indicating an error within a dispersed storage network
989088399Circuit and method for testing jitter tolerance
999083525Method and apparatus for generating jitter test patterns on a high performance serial bus
1009077535System and method for testing a radio frequency multiple-input multiple-output data packet transceiver while forcing fewer data streams
1019077330Serializer circuitry for high-speed serial data transmitters on programmable logic device integrated circuits
1029071549Communication device using plurality of communication paths
1039071407Receiver clock test circuitry and related methods and apparatuses
1049059879Test signal generation and application in receivers
1059048967Asymmetric OTN network traffic support
1069020021Precoding loss reduction
1079001270Data analyzing and/or combined main/mobile receiving
1088995285Methods for reconciling trunk group identification information among various telecommunication network management systems

2014

1098913507Virtual data loopback and/or data capture in a computing system
1108887016IC and a method of testing a transceiver of the IC
1118861376Broadcast receiving apparatus and method of determining broadcast reception state thereof
1128750106Interface control system and interface control method
1138665700Fault detection and mitigation for in-vehicle LAN network management

2013

1148614959Method and apparatus for certifying a signal message in a communications network
1158584236Method and apparatus for detecting abnormal traffic in a network
1168553571Auto reply and loop-back method for the remote measurement of the quality of an internet phone
1178502670Real-time RFID positioning system and method, repeater installation method therefor, position confirmation service system using the same
1188474036Database context-based intrusion detection

2012

1198301956Methods and apparatus to improve communication in a relay channel
1208189485Method for allocating and configuring tandem connection monitoring (TCM)
1218145452Serial interface amplitude selection for a disk drive in an unknown interconnect environment

2011

1228045479Method and system of testing video access devices
1238014977Serial interface amplitude selection for a disk drive in an unknown interconnect environment

2010

1247724646System and method for implementing service switching
1257701880Fibre channel link initialization

2009

1267623444Apparatus and method for redundancy control of duplex switch board
1277571379Method and system for configuring registers in microcontrollers, and corresponding computer-program product

2008

1287408883Apparatus and method for performing a loopback test in a communication system
1297400673Method of determining and displaying powers of code channels and analysis device

2007

1307240251Method and system for data transmission in a CT device, with integrated error monitoring and diagnosis
1317168015TF-determination apparatus, and TF-determination method as well as program to be executed for implementing the TF-determination method

2006

1327117401Method and apparatus for optimizing timing for a multi-drop bus
1337032113Network enabled application software system and method

2005

1346968490Techniques for automatic eye-degradation testing of a high-speed serial receiver
1356965648Source synchronous link integrity validation
1366961317Identifying and synchronizing permuted channels in a parallel channel bit error rate tester
1376959038High-speed decoder for a multi-pair gigabit transceiver
1386954615Display terminal
1396952442Activation of multiple xDSL modems with implicit channel probe
1406947502Parameter estimator for a multiuser detection receiver
1416947482System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system
1426944237Multi-pair transceiver decoder system with low computation slicer
1436938190Failure detector for communication network in automobile
1446934326Activation of multiple xDSL modems with implicit channel probe
1456931577Bit error measurement apparatus and method, and recording medium
1466931335Jitter histogram approximation
1476928597Method and apparatus for testing digital circuitry
1486928592Communication channel accuracy measurement
1496928106Phy control module for a multi-pair gigabit transceiver
1506928018Dynamic register with low clock rate testing capability
1516927565Dynamic register with IDDQ testing capability
1526922417Method and system to calculate network latency, and to display the same field of the invention
1536920591Measuring an error rate in a communication link
1546918060Bounding data transmission latency based upon link loading and arrangement
1556917916Method and apparatus for testing digital channels in a wireless communication system
1566917647Activation of multiple xDSL modems with power control measurement
1576914884Communication control circuit
1586912247Digital signal transmission system and method of displaying transmission condition in digital signal transmission system
1596909741Network quality of service localizer
1606907542System, device and method for determining the reliability of data carriers in a failsafe system network
1616907062PRBS generator selection in modem communication
1626892149Identifying data loss in a transmission system
1636888885Modem data constellation design including power compensation for analog loss and utilization of maximum dynamic range of CODEC
1646888799SDH test apparatus and SDH test method
1656885746Crosstalk identification for spectrum management in broadband telecommunications systems
1666883117Bus trace analysis a posteriori
1676880114Built-in test signal attenuation circuit
1686880112Method and apparatus for online detection and correction of faults affecting system-on-chip buses
1696877129Method for measuring the receiver-side bit error rate of a DVB transmission system
1706873652Activation of multiple xDSL modems with implicit channel probe
1716871152Method and apparatus for performing eye diagram measurements
1726870901Design and architecture of an impairment diagnosis system for use in communications systems
1736868069Method and apparatus for passively calculating latency for a network appliance
1746865700Using profiles to perform bit error rate testing
1756865234Pair-swap independent trellis decoder for a multi-pair gigabit transceiver
1766865221Systems and methods for loop length and bridged tap length determination of a transmission line
1776862701Data communication system with self-test facility
1786859900Injection of selected numbers of errors in returned loopback data to provide gray-scale type qantification of loop performance measurements
1796851083Method for transmitting source encoded digital signals
1806842868Connection integrity monitor for digital selection circuits
1816839383Method and system for testing a digital subscriber line modem

2004

1826826505System and method for testing a communications server
1836826140Multichannel digital recording system with multi-user detection
1846823483Physical coding sublayer for a multi-pair gigabit transceiver
1856823480Operational status identification system for a modem or other communication system
1866816559FSK modulation transceiver
1876807228Dynamic regulation of power consumption of a high-speed communication system
1886792566Method and apparatus of pre-loading a seed for a test code of a physical layer device
1896785855Implementation of an assertion check in ATPG models
1906785622Method and apparatus for performing eye diagram measurements
1916782335Method and system for estimating input power in a cable modem network
1926778931Test and measurement instrument having multi-channel telecommunications mask testing capability
1936778602Multi-pair gigabit ethernet transceiver
1946772378Dummy error addition circuit
1956771725Multi-pair gigabit ethernet transceiver
1966769039Data processing apparatus with circuit for confirming normality of serial transmission data
1976768772Activation of multiple xDSL modems with implicit channel probe
1986768703Eye diagram analyzer with fixed data channel delays and swept clock channel delay
1996765957Activation of multiple xDSL modems with implicit channel probe
2006763087Mobile VDSL signal detector
2016760676On-screen tools for eye diagram measurements
2026760571Automatic frequency deviation detection and correction apparatus
2036751254Activation of multiple xDSL modems with power control measurement
2046748338Method and apparatus for testing eye diagram characteristics
2056745148Intelligent test point selection for bit error rate tester-based diagrams
2066744247Method and measuring device for measuring the spectra in adjacent channels
2076741866Fade margin test
2086741642Enhanced constellation display for VSB television signals
2096738419Dynamic regulation of power consumption of a high-speed communication system
2106737859Dynamic register with IDDQ testing capability
2116731914Determination of transmitter distortion
2126731691Multi-pair gigabit ethernet transceiver having adaptive disabling of circuit elements
2136728648Test and measurement instrument having telecommunications mask testing capability with an autofit to mask feature
2146721916System and method for trellis decoding in a multi-pair transceiver system
2156715112Method and apparatus for displaying triggered waveform on an error performance analyzer
2166708020Calibration device
2176707848Demodulator for a multi-pair gigabit transceiver
2186693957Adaptive front end for discrete multitone modem
2196693881Method for bit error rate measurements in a cell-based telecommunication system
2206691262Method and apparatus for quality evaluation of cable circuit
2216684351System and method for diagnosing errors in multidimensional digital frame structure communications
2226684350Repetitive pattern testing circuit for AC-coupled systems
2236683854System for checking data integrity in a high speed packet switching network node
2246680913Method and system for testing data channel functionality in a radio apparatus
2256678858Code error monitor apparatus
2266678839Troubleshooting method of looped interface and system provided with troubleshooting function
2276678251Link quality agent
2286675328System and method to determine data throughput in a communication network

2003

2296671312Telecommunications line test method
2306662367Poly-phase filters in multicarrier communication systems
2316661850Testing system of voice-band data transmission interface on an exchange
2326661836Measuring jitter of high-speed data channels
2336661727Dynamic register with low clock rate testing capability
2346658607Method for detecting troubles of transmission in SDH and SONET
2356658569Secret key cryptographic process for protecting a computer system against attacks by physical analysis
2366658052Systems and methods for establishing a diagnostic transmission mode and communicating over the same
2376657966Test access system and method for digital cross connect communication networks
2386651195Method and system for bit error structure measurements of data transmission channels
2396650622System for communicating with electronic equipment
2406643257Verifying performance of a buffering and selection network device
2416642926Test and measurement instrument having telecommunications mask testing capability with a mask zoom feature
2426639426Apparatus for testing simultaneous bi-directional I/O circuits
2436636994Apparatus and method for examining bit values during bit error location measurements
2446633620Data receiver capable of invalidating erroneous pulses
2456629290Method and apparatus for automatic transmit verification
2466628737Signal synchronization using synchronization pattern extracted from signal
2476628621Multichannel-capable bit error rate test system
2486621831Method and apparatus for verifying and correcting connectivity
2496618696Method of testing and simulating communication equipment over multiple transmission channels
2506611928Homo-code continuity proof testing device
2516608835Communication system with multicarrier telephony transport
2526606351Ingress protection in a communication system with orthogonal carriers
2536603822Communicating errors in a telecommunications system
2546601004Method and apparatus for measuring parameters of an electronic system
2556600433Method and apparatus for correcting digital code words in a digital communication network
2566597754Compensation of frequency pulling in a time-division duplexing transceiver
2576594322Method of distributed loop control for a multicarrier telephony transport
2586594275Fibre channel host bus adapter having multi-frequency clock buffer for reduced power consumption
2596590870Transmission of alternating delimiter code to achieve byte alignment when using in-band digital code sequences to remotely provision network interface device terminating local loop
2606590462Noise code string generator and CN controller comprising it
2616587840Data health monitor for financial information communications networks
2626583898Optical transmission device and method for checking transmission in an optical transmission device
2636583628Process and device to determine malfunctioning detectors acting as current sinks in a danger signaling system
2646564349Built-in self-test systems and methods for integrated circuit baseband quadrature modulators
2656563333Dynamic register with IDDQ testing capability
2666549781System and methods for rapidly determining CDMA network performance
2676549595High-speed serial data communication system
2686545976Measurement of network protection switch time
2696542538Method and apparatus for testing wireless communication channels
2706538865Fault-detecting device for communication system
2716538451Single ended measurement method and system for determining subscriber loop make up
2726535715Hybrid/fiber coax video and telephony communication system with poly-phase filtering
2736523233Method and apparatus for telephone network impairment detection and compensation in signal transmission between modems
2746522436Multiplexed transmission of optical signals
2756519718Method and apparatus implementing error injection for PCI bridges
2766519230Device for testing synchronous-transfer-mode switch
2776516445System and method for detecting point-of-deployment (POD) module failure
2786516434Application-specific integrated circuit (ASIC) for use in communication facilities of a digital network
2796510229Communication system with multicarrier telephony transport
2806507199Method for measuring the operating properties of a subscriber line module for high-bit-rate data transmission
2816505310Connection integrity monitor for digital selection circuits

2002

2826501804Method for the transmission of digital signals
2836499009Handling variable delay in objective speech quality assessment
2846498663Methods and systems for detecting optical link performance of an optical link in a hybrid fiber coaxial path
2856496544Digital computing system having adaptive communication components
2866493319Test access system and method for digital communication networks
2876490317Data, path and flow integrity monitor
2886490269OFDM signal generation method and OFDM signal generation apparatus
2896487405Communication system with multicarrier telephony transport for controlling a plurality of service units
2906484202Method and apparatus for determining the status of a transmission link
2916480469Dial-up access response testing method and system therefor
2926477354Communication system transmitting modulated orthogonal carries with service units that scan spectrum to identify assigned band
2936477238Loop certification and measurement for ADSL
2946477200Multi-pair gigabit ethernet transceiver
2956477199Dynamic regulation of power consumption of a high-speed communication system
2966477198Quality cause measurement display
2976470074System and method for providing data and voice services on a shared line
2986467092Method for adjusting power in a communication system with multicarrier telephony transport
2996466650Telecom service identification transponder apparatus and technique
3006459773System to pre-qualify copper subscriber loops for high bandwidth access service using subscriber or network generated tones
3016459746Multi-pair gigabit ethernet transceiver
3026456552Dynamic register with low clock rate testing capability
3036453432Method and system for communicating the status of a digital transmission line element during loopback
3046453014Test access and performance monitoring system and method for cross-connect communication network
3056434583Fast fourier transform apparatus and method
3066430266Apparatus and method for examining and standardizing line connections
3076430160Estimating data delays from poisson probe delays
3086427133Process and device for evaluating the quality of a transmitted voice signal
3096424628Analyzing signals
3106418558Hybrid fiber/coax video and telephony communication
3116417834Arrangement for displaying the signal statuses of a QAM-modulated signal
3126415133Acquisition and tracking in communication system with multicarrier telephony transport
3136411117Dynamic register with IDDQ testing capability
3146404805Bit error measuring device for modem device and bit error measuring method for the same
3156404733Method of exercising a distributed restoration process in an operational telecommunications network
3166397042Self test of an electronic device
3176389068Sliced bandwidth distortion prediction
3186385237Non-invasive digital cable test system
3196381221System and method for monitoring line performance in a digital communication network
3206374375Monitoring line conditions in the data transmission mode
3216374165Railway information transmission method and system
3226373900Multi-pair transceiver decoder system with low computation slicer
3236373822Data network protocol conformance test system
3246373819Routine testing parity maintenance
3256367028Self diagnosing communications bus and method of operating same
3266366585Distributed control in a communication system
3276363129Timing recovery system for a multi-pair gigabit transceiver
3286351830Apparatus for checking for defect of serial communication devices and method thereof
3296348811Apparatus and methods for testing simultaneous bi-directional I/O circuits
3306338156Method and device for detecting the loss-of-signal condition at the input of a transmission line interface
3316336201Synchronization in a communications system with multicarrier telephony transport

2001

3326334219Channel selection for a hybrid fiber coax network
3336330241Multi-point to point communication system with remote unit burst identification
3346329807Device for the recognition of a defective signal
3356324260Channel check test system
3366317843Erroneous package mounting determination method for a transmission device, and a transmission device using the same
3376313932Multiplexed transmission of optical signals
3386307905Switching noise reduction in a multi-clock domain transceiver
3396294992High power control signal transmission and low power data signal transmission in a wireless security system
3406292651Communication system with multicarrier transport distribution network between a head end terminal and remote units
3416292516Communication system using packets stuffed with test words for evaluating data reception characteristics while providing increased data throughput
3426289047Dynamic regulation of power consumption of a high-speed communication system
3436288639Low power installation of wireless security system devices
3446282683Communication system with multicarrier telephony transport
3456282239Method and apparatus for testing a communications line in a data processing system
3466282173Processing apparatus for measuring performance monitoring parameters
3476279158Dynamic bandwidth allocation
3486278730Non-invasive digital cable test system
3496278729Method and apparatus for testing a communications line in a data processing system
3506275990Transport of payload information and control messages on multiple orthogonal carriers spread throughout substantially all of a frequency bandwith
3516275519Frame synchronization in a digital communications system
3526272173Efficient fir filter for high-speed communication
3536272112Repeating unit testing system and communication apparatus as well as communication method
3546268808High speed data modification system and method
3556263013Fast tracking of PN synchronization in a direct-sequence spread-spectrum digital communications system
3566259900Radio frequency signal folding-back transmitting/receiving circuit and radio transmitting/receiving apparatus for use therewith
3576259314Built-in self test for a satellite demodulator
3586256353Method and apparatus for generating a probing signal for a system having non-linear network and codec distortion
3596256337Rapid acquisition of PN synchronization in a direct-sequence spread-spectrum digital communications system
3606256335Slow tracking of PN synchronization in a direct-sequence spread-spectrum digital communications system
3616253345System and method for trellis decoding in a multi-pair transceiver system
3626252904High-speed decoder for a multi-pair gigabit transceiver
3636252502Alarm detection apparatus
3646249544System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system
3656249127Method and circuit for checking lead defects in a two-wire bus system
3666247092Control of command transmission and reception in a data transmission device and data transmission device therefor
3676233613High impedance probe for monitoring fast ethernet LAN links
3686233274Non-invasive digital cable test system
3696233225Line coding mismatch detection technique
3706230120Detection of speech channel back-looping
3716230086Railway information transmission method and system
3726226332Multi-pair transceiver decoder system with low computation slicer
3736222877Method for performance monitoring of data transparent communication links
3746215855Loop certification and measurement for ADSL
3756215773Method to control a switching unit and an arrangement working according to the method
3766212246Symbol-quality evaluation in a digital communications receiver
3776212119Dynamic register with low clock rate testing capability
3786208694Reduced power supervisory message transmission in a wireless alarm system
3796208621Apparatus and method for testing the ability of a pair of serial data transceivers to transmit serial data at one frequency and to receive serial data at another frequency
3806201831Demodulator for a multi-pair gigabit transceiver
3816201829Serial/parallel GHZ transceiver with pseudo-random built in self test pattern generator
3826188672Circuit arrangement for sensing errors in bit patterns
3836185594Versatile signal generator
3846185261Determination of transmitter distortion
3856181745Process for monitoring the quantization quality in digital radio or television transmission systems
3866169883Remote test of a subscriber connection in a system implementing a wireless subscriber connection
3876169763Characterizing a communication system using frame aligned test signals

2000

3886167077Using multiple high speed serial lines to transmit high data rates while compensating for overall skew
3896151691Remote reporting system for digital transmission line elements
3906148422Telecommunication network utilizing an error control protocol
3916130619Monitoring circuit for a communication device
3926128313Apparatus and method for filtering line noise and improper packet formatting
3936122313Self-contained self-testing data modulator
3946119168Communications system usable as system for simulating a plurality of other communications systems and communication processing system having such communications system
3956115395Method of detecting network impairments for high speed data communication over conventional subscriber lines
3966108801Using profiles to perform Bit Error Rate Testing
3976098179Method and apparatus for performing error detection
3986097768Phase detector for carrier recovery in a DQPSK receiver
3996094737Path test signal generator and checker for use in a digital transmission system using a higher order virtual container VC-4-Xc in STM-N frames
4006091713Method and system for estimating the ability of a subscriber loop to support broadband services
4016088824Test pattern generating apparatus, communication device and simulator
4026081550Method of testing clock paths and network elements for carrying out the method
4036076175Controlled phase noise generation method for enhanced testability of clock and data generator and recovery circuits
4046072842Carrier-recovery loop with stored initialization in a radio receiver
4056069876Performance monitoring of an ATM Network
4066061393Non-invasive digital cable test system
4076061391Error indicator, and data modulator-demodulator and indicating method of light emitter therein
4086058102Method and apparatus for performing service level analysis of communications network performance metrics
4096055281Passband DQPSK detector for a digital communications receiver
4106049720Link delay calculation and compensation system
4116044480Message generation and verification for a communication network
4126018556Programmable loop filter for carrier recovery in a radio receiver

1999

4136006206Data health monitor for financial information communications networks
4146006150Communications device for control device
4156002714Data, path and flow integrity monitor
4166002710Timing recovery for a pseudo-random noise sequence in a direct-sequence spread-spectrum communications system
4176002709Verification of PN synchronization in a direct-sequence spread-spectrum digital communications system
4185995548Signaling method using multiple modulus shell mapping
4195991270Dynamic communication line analyzer apparatus and method
4205987629Interconnect fault detection and localization method and apparatus
4215983365Frame processing unit with test mode, line termination module including such a frame processing unit, and method for testing such a frame processing unit
4225982752Method and apparatus for detecting multiplexing standard mismatches in communication networks
4235978419Transmitter and receiver circuits for high-speed parallel digital data transmission link
4245970089Method and apparatus for generating a probing signal for a system having non-linear network and codec distortion
4255966416Verification of PN synchronization in a spread-spectrum communications receiver
4265966414System and method for processing signals to determine their stochastic properties
4275966306Method for verifying protocol conformance of an electrical interface
4285963885Sensing circuit
4295963545Fault evaluating system for transmission apparatus
4305956370Wrap-back test system and method
4315953372Loopback transmission testing in a communications device
4325951701Detection of loop-back conditions on faulty digital trunks
4335946462Station management circuit
4345943629Method and apparatus for real-time ionospheric mapping and dynamic forecasting
4355940480Method of extracting a call set-up failure probability and a premature disconnect probability by using network data
4365940435Method for compensating filtering delays in a spread-spectrum receiver
4375940412Decoding method
4385939887Method for measuring spectral energy interference in a cable transmission system
4395920608Measurement device for communication
4405914965Serial output self-test circuit
4415889785Remote reporting system for digital transmission line elements
4425883882Fault detection in a frequency duplexed system
4435881066System for testing a transmission link
4445878352Apparatus and method for selecting a transmitter for directed message delivery
4455875213GMSK communication device test system
4465875193Digital trunk for in-band line signal
4475874992Cable television data bit path error analyzer
4485870428Method for providing remote loop back testing in a digital data system having multiple protocols
4495870211Error rate measurement system for high speed optical pulse signals
4505867041Clock signal testing apparatus for use in a synchronous transmission system
4515862200Ground fault detector for T1 span equipment
4525862177Method for testing communications channels
4535862157Method and circuitry for monitoring a digital channel

1998

4545851386Waste-oil cleaning apparatus
4555850605Method and apparatus for dynamically grouping transmitters for message transmission in a communication system
4565848073Method and apparatus for predicting transmission system errors and failures
4575841667Evaluation of signal-processor performance
4585835501Built-in test scheme for a jitter tolerance test of a clock and data recovery unit
4595835500Error rate monitor
4605825823PCM channel diagnosis
4615822373Method and apparatus for optimization of wireless communications
4625822332Pseudonoise code pull in circuit
4635812558Device and method for generating multiplexed signals with real time inputs for testing voice grade channels in a demultiplexer
4645812556Fault tolerant switch fabric with control and data correction by hamming codes and error inducing check register
4655805571Dynamic communication line analyzer apparatus and method
4665802105Method and apparatus for testing a digital communication channel
4675799242Communication control unit for mobile communication systems and the like, including a channel quality detection unit, a quality decision unit and a control unit
4685793815Calibrated multi-voltage level signal transmission system
4695793780Method for monitoring transmission of digital data signals on two parallel data lines
4705793749Method and apparatus for communications testing using a recorded test message
4715787133Signal modulation employing a pseudo-random sequence of pilot symbols
4725787114Loop-back test system and method
4735784411Method and system for processing signals for use in a wireless communication system
4745784407Method and device for monitoring an abnormality in digitally transmitted audio signals
4755784406Method and apparatus for objectively characterizing communications link quality
4765778048Feed imbalance detector in repeated line
4775768312Method and apparatus for evaluating digital transmission systems
4785768301Apparatus and method for detecting and correcting pair swap, and implementing a link integrity function in a packet-based data communications system
4795768300Interconnect fault detection and localization method and apparatus
4805764727Metallic access test extender
4815764694Self-testing and evaluation system
4825761216Bit error measurement system
4835757813Method for achieving optimal channel coding in a communication system
4845757810Transmission link supervision in radiocommunication systems
4855751935Radio paging system
4865751766Non-invasive digital communications test system
4875748876System and method for testing acoustic modems with semantically encoded waveforms
4885745549Line break detection device and modem comprising such a device
4895742589Radio apparatus
4905737317Communication system testing method
4915737165Apparatus for databus fault isolation
4925734341Encoding digital data
4935727006Apparatus and method for detecting and correcting reverse polarity, in a packet-based data communications system
4945726991Integral bit error rate test system for serial data communication links
4955724362Apparatus and method employing a window reset for excessive bit error rate alarm detection and clearing
4965715238Apparatus and method for detecting a loss of a telecommunications channel connection
4975712898D4 channel bank with multi-mode formatted, performance-monitoring communication bus

1997

4985703409Error counting circuit
4995701410Method and system for detecting fault conditions on multiplexed networks
5005692021Encoding digital data
5015691998Data transmission protection circuit with error correction
5025682405Ones density monitor
5035680405Remote reporting system for digital transmission line elements
5045671228System for detecting non-coincidence of codes
5055666378High performance modem using pilot symbols for equalization and frame synchronization
5065661778Performance monitoring of DSO channel via D4 channel bank
5075657356Control signal detection method with calibration error and subscriber unit therewith
5085657346Transmission line driver test integrity circuit
5095655068Point-to-multipoint performance monitoring and failure isolation system
5105652760Error rate measuring apparatus
5115640401Communication circuit fault detector
5125636203Method and system for identifying fault locations in a communications network
5135629957Method and apparatus for simultaneously displaying distribution patterns of equalized output signals from multiple channels
5145623515Data communication system for reducing a risk of transmission errors
5155623497Bit error rate measurement apparatus
5165621758PWM Communication system
5175619550Testing within communication systems using an arq protocol
5185610923Method and device for finding spurious maintenance messages
5195600660Method for determining the number of defective digital bits (defective bit number) transmitted over a data-transmission path to be tested, and device for the carrying out of the method
5205600656Remote loopback apparatus and method for telephone line repeaters
5215598431Method and apparatus for signal quality detection in a communication system
5225598420Apparatus and method for generating a power signal for a power system from signals genenrated by a communication device

1996

5235579369Facility type determination technique
5245579339Method for concurrent monitoring of multiple communications
5255574495Cable television data path error analyzer located at the set-top terminal
5265572555Serial code format optimized for remote control applications over noisy communications channel
5275570382Clock signal fault detector
5285568202System for echo cancellation comprising an improved ghost cancellation reference signal
5295559810Communication of data reception history information
5305555507Method for detecting non-linear behavior in a digital data transmission path to be examined
5315555248Tandem connection maintenance system
5325553059Network interface unit remote test pattern generation
5335550837Adaptive differential pulse code modulation system with transmission error compensation
5345548775System and method for adaptive active monitoring of high speed data streams using finite state machines
5355546425Transmission system for transmitting data by a link comprising intermediate equipments and an intermediate equipment for such a system
5365528635Synchronization detecting circuit
5375526410Method and system for determination of signal/noise ratio of telephone transmission line used for facsimile transmission
5385519830Point-to-multipoint performance monitoring and failure isolation system
5395517522Process for detecting the nature of data-falsifying interference
5405517518Method and arrangement for recognition of a coded transmitted signal
5415517510Method and apparatus for indicating uncorrectable errors to a target
5425515398Modem line probing signal techniques
5435513347Data transfer system
5445506870Signal acquisition detection method
5455504863Centralized network monitoring device for monitoring devices via intermediate monitoring devices by means of polling and including display means displaying screens corresponding to heirarchic levels of the monitored devices in a network
5465504761Apparatus for detecting error in a communications line
5475502653Testing data transmissions between fax modems through real time synchronization and resynchronization of asynchronous data
5485499339Process for determining the origin of bit errors in a data stream transmitted from a data source to a data receiver
5495497377Communication system and method of detecting transmission faults therein
5505490177Method and apparatus for determining signal quality
5515490148Bit error rate estimator
5525485583System for controlling data transfer by setting and decrementing a counter based on the number of error correction bits and transfer bit rate respectively
5535485470Communication circuit fault detector
5545483639Device for detecting transmission errors in balanced two-wire bus lines and two-bus interfaces
5555483237Method and apparatus for testing a CODEC

1995

5565477531Method and apparatus for testing a packet-based network
5575473665Performance monitoring of DS0 channel via D4 channel bank
5585473329Performance monitoring for loops
5595463633Use of at commands to test modem with HP3065
5605463631Error pulse width expanding circuit
5615461623Data transmission system with abnormality discrimination
5625453989Subscriber digital transmission system
5635450440Monitor system for digital communication apparatus
5645450416Apparatus and method for testing multifunction communications networks
5655446781Testing of subscriber lines in a digital switch
5665442697Digital data loopback device
5675432796Line Monitoring for SDH signals
5685423059Method for enhancing signal quality in a simulcast communication system
5695422876Out-of-band loopback control scheme
5705420886Digital transmission equipment
5715408475Modem with transient impairment detector
5725402440Processes for testing bi-directional serial transmissions, and circuits for their implementation
5735400361Signal acquisition detection method
5745398234DS-0 loop-back detection on a DS-1 line
5755394145Performance monitoring for loops
5765392314Process for determining the quality parameters of transmission link for digital data streams having a cellular structure
5775391387Process and apparatus for manufacturing shaped confectionery products
5785390199Advanced code error detection apparatus and system using maximal-length pseudorandom binary sequence
5795383177Packet switching testing method and apparatus

1994

5805359609Quality check equipments for digital transmission links
5815359594Power-saving full duplex nodal communications systems
5825347522Method and apparatus for detecting pseudo noise pattern for remote loopback test
5835343461Full duplex digital transmission facility loop-back test, diagnostics and maintenance system
5845325397Error rate monitor
5855321722Multipoint connected communication system having function of retraining modems provided therein and method of retraining the modems
5865313497Method of detecting a disturbing signal for a digital data demodulator, and apparatus implementing such a method
5875305323Technique for digitally detecting bit-error densities that occur in a serial bit stream
5885289473Method for determining byte error rate
5895285459HDB3 code violation detector
5905282211Slip detection during bit-error-rate measurement
5915278823Method and apparatus for permitting intranework testing of internetwork functions

1993

5925274668Integrated circuit demodulator component
5935271035Repeater supervision
5945260819Digital telemetry system and method for fault detection in optical transmission system
5955249186Apparatus for detecting the start of frame in bipolar transmission systems
5965228042Method and circuit for testing transmission paths
5975224128Method and circuit arrangement for monitoring the operating condition of an electro-optical transmission system
5985220581Digital data link performance monitor
5995218601Method for searching for alternate path in communication network
6005187811Error detection
6015179444System for echo cancellation comprising an improved ghost cancellation reference signal

1992

6025172232Method and apparatus for communication channel identification and signal restoration
6035166890Performance monitoring system
6045163051Paired bit error rate tester
6055161151System and method for controlling multiplex communications between master station and slave stations
6065157665Integrated services digital network (ISDN) test device
6075152008Signal control apparatus capable of readily changing an apparatus output signal
6085148434Digital data generator
6095138616Continuous on-line link error rate detector utilizing the frame bit error rate
6105136591Measuring method and device for fault analysis of digital transmission paths
6115134612Digital communication terminal equipment
6125131010Voice guard digital voter for multiple site PST RF trunking system
6135128962Line interface circuit and a method of testing such a circuit
6145123020Phase synchronization pull-in system in bit error detecting apparatus
6155121211System for echo cancellation comprising an improved ghost cancellation reference signal
6165111298Method and apparatus for communication channel identification and signal restoration
6175099500Symbol detection and error correction coding in a local area network
6185093842Mechanism for estimating Es/No from pseudo error measurements
6195081666Method for measuring the bit error rate in the transmission of digital information

1991

6205060226Telecommunications network test system
6215058143Digital communications systems
6225056090Data transmission apparatus to be connected to multiplexed transmission line
6235047859Method and apparatus for communication channel identification and signal restoration
6245027343Remote test access system for ISDN testing
6255023612Illegal sequence detection and protection circuit
6264993045Modem diagnostic loop
6274992973Data transmission apparatus with loopback topology
6284989949Arrangement for discriminating whether or not semiconductor laser is functional
6294989202ISDN testing device and method
6304985901Method and device for evaluating the safety margin of a digital video signal

1990

6314972511Receiver test apparatus with test message injector
6324967412Serial data frame generator for testing telecommunications circuits
6334962509Code violation detection circuit for use in AMI signal transmission
6344956852Method for remote configuration of a modem
6354920537Method and apparatus for non-intrusive bit error rate testing
6364918685Transceiver arrangement for full-duplex data transmission comprising an echo canceller and provisions for testing the arrangement
6374918623Testing the performance of a communication line between two modems using modem processor
6384905172Method of generating and transmitting digitally distorted test signals
6394897831Data transmission/reception apparatus

1989

6404876701Synchronization failure detection
6414868824Measurement of missed start-up rate and missed message rate
6424860308Modem communication system having main and secondary channels
6434852082Circuit arrangement for testing the operability of the data transmission facility
6444837779Communicator and communication method and system
6454825459Local loop test arrangement in an echo canceller based full duplex modem
6464825113Single transmission line bidirectional optical communication system
6474800562Circuit and method for monitoring the quality of data in a data stream
6484796278Repeater for digital communication system
6494796257Bipolar violation rate calculation method

1988

6504791653Pseudorandom word sequence synchronizer
6514789948Method and apparatus for determining communications link quality and receiver tracking performance
6524783786CMI signal transmission system
6534771232Non-interruptive spectrum analyzer for digital modems
6544769807Loop back control system
6554756005Digital signal regenerator arranged for fault location
6564752926Orderwire detector for communication systems
6574751510Method and system for controlling a network of modems
6584748637Digital subscriber loop termination device
6594745603Code sequence generator for a digital transmission line fault location system
6604745601Digital service unit with secondary channel diagnostics
6614742518Fault location system for a digital transmission line
6624736377Method for determining reliability of high speed digital transmission by use of a synchronized low speed side channel
6634734676Method and device for detecting a particular bit pattern in a serial train of bits
6644733395Digital word generator

1987

6654710924Local and remote bit error rate monitoring for early warning of fault location of digital transmission system
6664697265Error monitor circuit
6674688226Code error overlaying in digital transmission signals
6684688207Channel quality monitoring apparatus
6694677627Error correction scheme
6704677619Method and apparatus for supervising digital radio transmission line
6714675862Loop around data channel unit
6724658399Circuit arrangement designed to pick up the error rate in numerical transmission systems
6734656643Line interface circuit
6744654807Method of measuring communication channel impairement in polling applications
6754653070Channel monitoring circuit for use in a repeater station over radio digital transmission
6764651328Arrangement for supervising a CMI-code converter
6774646320Automatic digital strapping apparatus for data modems
6784642807Fault tolerant receiver

1986

6794628507Bit error detection circuit for PSK-modulated carrier wave
6804626716Digital signal delay circuit
6814616362Logic for calculating bit error rate in a data communication system
6824604745Method of searching fault locations in digital transmission line
6834592044Apparatus and method for checking time slot integrity of a switching system
6844587653Circuit for controllable generation of pseudoerrors in bit processing
6854580263Signal quality monitoring device
6864578537Telecommunication apparatus serving as an interface between a digital computer and an analog communication medium
6874564933Supervision of digital transmission systems

1985

6884558317Digital communication link monitoring device
6894551830Apparatus for providing loopback of signals where the signals being looped back have an overhead data format which is incompatible with a high speed intermediate carrier overhead format
6904549049Arrangement for testing a device provided with an echo canceller
6914542496Loop transmission system and method of controlling the loop-back condition thereof
6924534043Test tone detector apparatus and method modem using same
6934529979Remote return loop control in a data transmission system
6944524244Digital and voice telecommunication apparatus
6954507621Generating quasi-random sequences in AMI code
6964502142Apparatus for detecting errors in a digital data stream encoded in a double density code
6974498186Data set diagnostic system

1984

6984490817Packet error rate measurements by distributed controllers
6994479217Message identification and data entry apparatus
7004468787Ternary data transmission system
7014449247Local orderwire facility for fiber optic communication system
7024445221Method and apparatus for measuring the frequency response of an element or elements in a digital transmission path
7034441185Monitoring method and device for a PCM regenerator having a code rule violation checking device
7044428076Method of and system for evaluating bit errors in testing a signal path

1983

7054410986Error and status detection circuit for a digital regenerator using quantized feedback
7064410983Distributed industrial control system with remote stations taking turns supervising communications link between the remote stations
7074408226Test apparatus for monitoring digital transmissions
7084402084Regenerator having a code rule violation checking device
7094402082Automatic line termination in distributed industrial process control system
7104398299Data set network diagnostic system
7114398297Data set diagnostic system
7124394695Method and apparatus for evaluating recording systems
7134393508System for locally testing a modem employing frequency shift keying
7144390984Status check method for a data transmission system
7154387461Experientially determined signal quality measurement device for antipodal data
7164385384Modem diagnostic and control system
7174385383Error rate detector
7184385230Digital temperature effect generator
7194384354Noise margin measurement and error probability prediction
7204369523Remote control system of an optical repeater
7214367550Method for monitoring the bit error rate of a digital transmission system

1982

7224363123Method of and apparatus for monitoring digital transmission systems in which line transmission errors are detected
7234351059Method for testing a digital data transmission line between two modems and a device for the application of said method
7244337457Method for the serial transmission of binary data and devices for its implementation
7254327356Arrangement for monitoring the performance of a digital transmission system
7264327258Method and apparatus for rapid evaluation of parameters affecting voiceband data transmission

1981

7274296495Device for measuring the quality of a digital radio link
7284291403Digital implementation of parity monitor and alarm
7294276649Receiver for digital signals in line code
7304273970Intermodulation distortion test
7314273955System for in-service quantitative performance analysis of data communications system
7324271514Loopback test for data transmission paths
7334271513Method and apparatus for carrying out loopback test
7344264972Method and circuit for detecting errors in digital signals
7354247938Method for generating a pseudo-signal in an error rate supervisory unit and circuit for carrying out the same
7364247934Testing system for data transmission paths

1980

7374242750Process for testing a data transmission system employing a test loop
7384238779Data transmission and reception system
7394234954On-line bit error rate estimator
7404232387Data-transmission system using binary split-phase code
7414221939Method and apparatus for determining the tuned frequency of a digital repeater
7424218771Automatic clock positioning circuit for a digital data transmission system
7434204228Digital testing apparatus
7444200838Apparatus for evaluating the error rate of binary digital signals
7454188615Bit error detecting circuit for use in a digital signal transmission line

1979

7464178582Digital signal transmitter/receiver system including programmable self-test capability
7474177447Device for detecting errors in a digital transmission system
7484158193Data transmission test set with synchronization detector
7494143354Detection of errors in digital signals

1978

7504127816Carrier detect and automatic loopback circuit
7514125764Transversal correlator error detector
7524100531Bit error rate measurement above and below bit rate tracking threshold
7534097697Digital signal performance monitor
7544093940System and equipment for quality checking of a digital connection circuit
7554091240Bit error rate performance monitor units in digital transmission links
7564091239Bit error rate performance monitor units in digital transmission links
7574086566Error detector for modified duobinary signals
7584070647Error measurement for digital systems
7594070646Pulse error detector
7604070554Digital testing and power control in a digital communication system
7614068172Method of and means for measuring distortion of binary and ternary signals

1977

7624064459Method of automatically testing the serviceability of a data transmission system
7634059729Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network
7644055808Data communications network testing system
7654053723Method and apparatus for measuring the bit error frequency in a cable caused by crosstalk between line pairs during transmission of a 3-level coded PCM signal
7664039751Method and apparatus for closed loop testing of first and second modulators and demodulators
7674034340System for determining the quality of transmission of incoming digital message signals
7684034195Test apparatus and method
7694028536SNAIAS digital data test set
7704022988Fault locating apparatus for digital transmission system
7714006304Apparatus for word synchronization in an optical communication system
7724001525Arrangement for testing telecommunication repeaters

1976

7733987395Arrangement of high frequency pulse regenerative repeaters
7743986168Multichannel error signal generator
7753976835Supervisory systems for telecommunication line transmission system
7763969582System for automatic synchronization of blocks transmitting a series of bits
7773965309Test system for a T carrier type telephone PCM communications system
7783965294Method of and apparatus for testing transmission line carrying bipolar PCM signals
7793952163Method and apparatus for testing in FDM system
7803943348Apparatus for monitoring the operation of a data processing communication system
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017