СПИСОК патентов США - подгруппа МПК16 H04M3/30


Выделить слова в названиях патентов:


№ п/п Номер патента Название патента

2017

19584183Fault identification using line attenuations
29584182Vectored DSL crosstalk cancellation
39560181Communication apparatus and control method for the same
49548914Estimating line rate
59544423Channel ordering for multi-channel multi-carrier communication systems

2016

69526019Method and system for diagnostics and troubleshooting in home network deployments
79503568Detecting dial tone on a telephone line
89497316Data communication
99491283Apparatus, systems and methods of common mode based diagnostics
109490871Fault localisation
119479912Transportable telecommunication interconnection device
129479637Systems and methods for establishing a diagnostic transmission mode and communicating over the same
139479223Method and apparatus in a communications network
149462116Reducing the feedback overhead during crosstalk precoder initialization
159460244Modular unit for stimulating performance in multi-lines digital subscriber line (xDSL) system
169444921System to provide real loops for sidetone measurement with analog telephones
179426283Method and apparatus of optimizing an xDSL transceiver configuration using single ended line test (SELT) measurement
189426282Method and apparatus for transmission line testing
199426268Method and apparatus for gauge identification based on single ended line testing (SELT)
209420090Diagnostic methods for twisted pair telephone lines based on line data distribution analysis
219413902Method and device for supplying power to access device
229413539Analog front-end transmitter and a connection method of an X-digital subscriber line having a pre-distortion mechanism
239407760Performance monitoring for discontinuous operation modes
249401840Quality check identifying source of service issue
259397781Method and apparatus for improving performance of transmit controlled adaptive modulation in xDSL and G.fast systems
269391834Apparatus, systems and methods of common-mode rejection ratio based diagnostics
279391744Method and apparatus for analyzing and mitigating noise in a digital subscriber line
289374452Apparatus and method for detection of off-hook phone in reverse power feeding architecture
299374132Communication system capable of measuring crosstalk in legacy line
309356891Voice messaging interface
319338282Data processing in a digital subscriber line environment
329338281Method and apparatus for detecting and locating loop impairments
339325859Method for optimising electrical consumption of a residential gateway
349319512Systems and methods for establishing a diagnostic transmission mode and communicating over the same
359312916Method and device for testing subscriber premises equipment
369300525Method and system to identify a source of signal impairment
379270813Pre-installation frequency domain premises wiring tests
389270332Method for testing a component of a vectoring system and line termination equipment configured to carry out said method
399264533Systems and methods for establishing a diagnostic transmission mode and communicating over the same
409246614Methods and devices for transmission line analysis
419241077Method and apparatus for DSL performance enhancement in a DSL network
429239356Test board

2015

439225825Method and apparatus for line testing
449215312Telecommunication diagnostic information management
459210257Systems and methods employing time domain reflectometry
469191496Digital subscriber line fault locating systems and methods
479191495Systems and methods for communicating vectoring streams in multi-card vectoring groups
489191066Systems and methods for loop length and bridged tap length determination of a transmission line
499188621Impairments identification module and method
509185204Method and apparatus for designing an improved transmit signal for use in a single ended line test (SELT)
519178990Systems and methods for characterizing loops based on single-ended line testing (SELT)
529178986Method and device for identification of an impairment within a telecommunication line
539178777User-preference-based DSL system
549166871Data communication
559160841Device and method for detecting absence of a POTS splitter in a digital subscriber line
569154638Data communication
579154595Handheld subscriber line test equipment
589148505Digital subscriber line identification method
599148504Method and system for single-ended line testing
609130854Measurement method
619130655Methods and systems for detecting metallic faults affecting communications links
629124723Method and device for data processing in a digital subscriber line environment
639124683Diagnostic engine
649106735Detection of wiring defects
659088642Systems and methods for handling crosstalk vectoring failures in multi-card vectoring groups
669083785Systems and methods selectively excluding tones from vectoring
679071678Intelligent loop diagnostics for digital subscriber line services to support a service assurance system
689065887Method, apparatus, and system for reducing power consumption on xDSL subscriber board
699054794Detecting faults affecting communications links
709054783Methods, apparatus, and articles of manufacture to trigger preemptive maintenance in vectored digital subscriber line (DSL) systems

2013

718571184Device and associated method for measuring crosstalk
728515014Methods, apparatus and articles of manufacture to characterize customer-premises networks

2007

737286646Subscriber line validation of a telephone network

2005

746950497Fault location in a telecommunications network
756947546Hook-flash simulation in parallel with off-hook devices
766940949Ring, tip, ground testing tool
776925173Optimization of a DSL-compatible POTS line card
786915250Customer premises simulation for a service provider
796914963Determining the composition of subscriber loops from frequency domain measurements
806912269Test unit for use at a network interface device
816904130Test unit for interface between telephone company demarcation point device and customer's telephone system
826901358Communication media simulation for a service provider
836901137Detecting faults in subscriber telephone lines
846895081Predicting performance of telephone lines for data services
856894504Technique for estimation of a subscriber line insertion loss
866876725Single ended line probing in DSL system
876873685Digital subscriber line access and network testing multiplexer
886873684System and method for estimating the capacity of a local loop to carry data
896870900Proactive maintenance application
906870899ADSL loop qualification systems and methods
916868060Circuit to provide backup telephone service for a multiple service access system using a twisted pair
926865257Method for resolving trouble in a connection having a plurality of components
936865221Systems and methods for loop length and bridged tap length determination of a transmission line
946856683Method for reducing noise from a non-linear device that shares a customer loop with an asymmetric digital subscriber line modem

2004

956829330Systems and methods for loop characterization from double-ended measurements
966829293Method and apparatus for line probe signal processing
976826261Subscriber testing system
986826258System and method for pre-qualification of telephone lines for DSL service using an average loop loss
996826155Apparatus and method for facilitating standardized testing of signal lines
1006819745Method and apparatus of testing a POTS circuit and DSL circuit through a splitter
1016812827System and method for testing and maintaining a predetermined physical bit rate on a line connection
1026804328Intelligent line testing
1036801601Single ended line probing in DSL system using transformerless hybrid
1046801307Modular measuring or testing device
1056798830Methods and apparatus for generating a test signal for xDSL devices
1066788784Circuit arrangement for signaling in telecommunications networks
1076778931Test and measurement instrument having multi-channel telecommunications mask testing capability
1086771739Pressure alarms and reports system module for proactive maintenance application
1096765988Automated dispatching from a telephone cable air pressure monitoring system
1106763108Apparatus and method for line pair testing and fault diagnostics
1116763087Mobile VDSL signal detector
1126754309Communication device and access network device
1136751253Communication port-powered digital communication interface for upgrading software-reconfigurable test set
1146748050Method and apparatus for performing either tone analysis on a local looped-back communications path or utilizing a hybrid reflection based looped-back test to test integrity
1156744813System and method for estimating noise characteristics in the presence of non-stationary noise
1166741676Determining the physical structure of subscriber lines
1176738455Apparatus and method for testing subscriber lines and equipment
1186728648Test and measurement instrument having telecommunications mask testing capability with an autofit to mask feature
1196721394Method for reducing noise from an asymmetric digital subscriber line modem
1206718019Method and apparatus for wireline characterization
1216707886Method and system for testing subscriber loops using touchtone telephone signals
1226694015Universal line interface in telecommunications system
1236693992Line probe signal and method of use
1246690769Hand-held telecommunication loop testing device
1256690720Automated testing of modem training
1266687336Line qualification with neural networks
1276687289Method for measuring the attenuation in digital transmission lines
1286674840Systems and methods for verifying the provisioning of advanced intelligent network services

2003

1296668059Telephone tuning and signaling system
1306668041Single ended line probing in DSL system
1316661850Testing system of voice-band data transmission interface on an exchange
1326658052Systems and methods for establishing a diagnostic transmission mode and communicating over the same
1336651189Communication network disturbance management method using top-down method
1346650732Telephony testing system
1356643266Method for qualifying a loop for DSL service
1366642926Test and measurement instrument having telecommunications mask testing capability with a mask zoom feature
1376639983Adaptable line driver interface for digital telephone systems
1386636841System and method for telecommunications system fault diagnostics
1396633642Balance network directional coupler system and method
1406633628Apparatus and method for selecting a supported signal path for a transceiver
1416631178System and method for transmitting data over loaded and unloaded twisted pairs
1426628754Method for rapid noise reduction from an asymmetric digital subscriber line modem
1436625255Apparatus and method for communications loop characterization
1446614881Remotely operable telecommunications conductor test circuit and method for using the same
1456614880Automated telephone line test apparatus with intelligent diagnostic function
1466611579Method for predicting and diagnosing trouble in a connection having a plurality of components
1476608885Method system and device for line monitoring
1486606719Method and arrangement to estimate transmission channel characteristics
1496606372System and method of testing an IDSL communications line
1506597782Method and apparatus for providing control and input sensing in a signal transfer point
1516594343Splitter bypass architecture for testing multiple ports
1526590962Method of performing non-interactive resistive fault location
1536584176Loop loss measurement and reporting mechanism for digital data services telephone channel equipment
1546584148System and method for testing digital subscriber lines
1556580782Interactive telephone response module
1566577711Methods for detecting defective communications lines
1576574310Apparatus and method for a wide band spectral balance measurement
1586574309Remotely actuated splittler bypass system and method
1596566889Line diagnostics for wireline modems
1606564227Customer support system
1616556661In-line telephony data protector with line condition announce
1626553105Enabling and powering of remotely actuated bypass splitters
1636549610Subscriber circuit having splitter disconnection function
1646538451Single ended measurement method and system for determining subscriber loop make up
1656535580Signature device for home phoneline network devices
1666535579Network interface device with disconnectable half-ringer
1676532216Central office based ADSL test platform
1686531879Method and apparatus for delay-line time-domain reflectometry
1696522731Data communication apparatus
1706519323Test unit for use at a network interface device
1716519322Apparatus and method for testing subscriber loop interface circuits
1726519320State monitoring method and apparatus in subscriber line test
1736516054Method for adjusting current levels, which have been falsified by offset-current levels, in a subscriber line circuit
1746516053System and method for testing telecommunication service installations
1756516049Method and apparatus for insertion loss estimation in wireline communications
1766507870xDSL web ordering tool
1776504906Telephone micro-tester and transport system

2002

1786490342Method for quickly testing the operability of a subscriber circuit
1796487276Detecting faults in subscriber telephone lines
1806480575Structure and circuit topology for a remotely actuated bypass splitter
1816477238Loop certification and measurement for ADSL
1826470074System and method for providing data and voice services on a shared line
1836466650Telecom service identification transponder apparatus and technique
1846466647System and method for estimating the capacity of a local loop to carry data
1856463126Method for qualifying a loop for DSL service
1866459773System to pre-qualify copper subscriber loops for high bandwidth access service using subscriber or network generated tones
1876456694Method for prequalifying subscriber lines for high speed data service
1886453016Method and apparatus for detecting and locating a fault in a telecommunications environment
1896453015Telephony testing system
1906453014Test access and performance monitoring system and method for cross-connect communication network
1916445773DMT test method for determining ADSL capability of cables
1926442239Telephone line longitudinal balance tester and method
1936438212Automated telephone line test apparatus with intelligent diagnostic function
1946434221Digital subscriber line access and network testing multiplexer
1956418195Apparatus for communicating a diagnostic device with a telecommunications system through a remote network unit
1966418160Method for testing a communication channel
1976416352Telecommunication apparatus test module with deflectable circuit switching contact
1986411680Telephonic apparatus and input device for telephonic apparatus
1996393102Computer-executable method for diagnosing trouble causes in telephone cable segments when trouble data are available only for entire cables
2006389110Telecom service identification resonator apparatus and technique
2016389109Fault conditions affecting high speed data services
2026385299Line testing in a telecommunications network
2036385297Method and apparatus for qualifying loops for data services
2046385296System to test a connection in a telephone network
2056373923Line testing method and apparatus therefor
2066373259Connector testing system having a test prong including a projection
2076366644Loop integrity test device and method for digital subscriber line (XDSL) communication
2086356624Method and apparatus for detecting and measuring foreign voltages
2096349130Method to pre-qualify copper loops for ADSL service
2106347075Circuit to provide backup telephone service for a multiple service access system using a twisted pair
2116343114Remotely addressable maintenance unit
2126341159Extrapolation of location and amplitude of noise sources on telecommunication wireline from ended access point

2001

2136330306Test device for telephone lines
2146320939Remote telephony testing device
2156301337Combined handset and POTS filter
2166301227Systems and methods for allowing transmission systems to effectively respond to automated test procedures
2176298118System and method for processing of communication line test signals, such as enhancement processing
2186295339Audio verification of digital subscriber line connection
2196292540Battery injection and loop supervision for DSL environment
2206292539Method and apparatus for digital subscriber loop qualification
2216285744Telephony test system with adjustable output impedance
2226285194Customer bridge with built-in test access
2236282277Unbundling device and method for connecting a competing local exchange carrier (CLEC) to the subscriber loop of a local exchange carrier (LEC)
2246278769Signaling method for invoking a test mode in a network interface unit
2256275571System for direct suppressed ringing access of subscriber lines
2266266395Single-ended subscriber loop qualification for xDSL service
2276266326Apparatus for loop testing in a communication system
2286263076Arrangement in a subscriber line interface circuit
2296263068Remote subscriber line unit provisioning system for use with voice communication facilities
2306259676Upgrading of subscriber connection
2316256377Loop loss measurement and reporting mechanism for digital data services telephone channel equipment
2326252942Wireless butt set
2336246748Power feeding system using two-wire subscriber lines
2346233312Inter-circuit line fault location in telecommunication networks
2356219406Back wiring board and aggregated device
2366215855Loop certification and measurement for ADSL
2376215854Digital signal processor-based telephone test set analyzing and displayed multiple signal parameter data for terminal mode and line monitor mode operation
2386212258Device for remotely testing a twisted pair transmission line
2396209108Method for testing VDSL loops
2406201853Telephone technician's remote assist apparatus and method
2416185280Line impedance matching using dynamically generated transfer functions
2426185191Testing of ISDN line via auxiliary channel signaling
2436185083Protected telecommunication test adapter module
2446181775Dual test mode network interface unit for remote testing of transmission line and customer equipment
2456173040Telephone line state detecting device
2466169785Apparatus and method for testing subscriber line
2476169784Telecommunication line termination test
2486169783Line testing in a telecommunications network

2000

2496144722System and method for programmable telephone subscriber line test in ring mode
2506144721Apparatus and method for line pair testing and fault diagnostics
2516129575Testing system for a connector with a self-sealing connector housing
2526128753Fault management system for a telecommunications network
2536125458Fault management system for a telecommunications network
2546115355Reprovisioning monitor
2556111936Method and apparatus for automatically detecting and measuring distortion in a DSL system
2566108404Method and system for testing a connection in a telephone network using interactive telephone response module
2576084945Perfected protection and cutting unit by rotational control device, for connection and testing modules of telephone lines
2586058161System and method for programmable telephone subscriber line test
2596055299Connector block with built-in array test feature
2606039578Network interface device for line testing
2616038303Method and apparatus for remotely activating services in a telecommunications network
2626026146Automated voice terminal protocol identification system
2636026145Method and apparatus for fault segmentation in a telephone network
2646014425Apparatus and method for qualifying telephones and other attached equipment for optimum DSL operation

1999

2656008654Method and apparatus for testing lines in a telecommunications network
2666002746Line testing in a telecommunications network
2676002671Test instrument for testing asymmetric digital subscriber lines
2685999593System and method for automatic PBX detection
2695995617Connector block mountable connector and telephone circuit
2705982815Circuit for setting a device into a test mode by changing a first port to a fixed clock and a second port to a non-fixed clock
2715978449Qualifying telephone line for digital transmission service
2725974363Self-testing of smart line cards
2735974115System and method for testing subscriber lines and terminating equipment from a service platform
2745966439Modular telephone line connecting disconnecting and testing block
2755956386Telephone subscriber line diagnostics system and method
2765956385Test set interface for automatically detecting line type
2775937034Method for testing call waiting, caller ID functionality of telephone line
2785937033Telephone system diagnostic measurement system including a distant terminal drop test measurement circuit
2795933479Remote service system
2805930334Method and apparatus for monitoring the operation of telecommunications equipment
2815917885Method and system for testing subscriber circuits and wiring in a cable communication system
2825912960Method and apparatus for remotely activating services in a telecommunications network
2835912629Subscriber interface control method
2845907614High density telephone network interface unit
2855903624Data terminal for telephone circuits
2865901201Switch-based line continuity verification method and system
2875901024Apparatus and method for circuit protection
2885898921Monitoring of the operation of a subscriber unit
2895896569Wireless access to telephone network dial tone
2905892756Portable telecommunication network testing device
2915889837Testing a subscriber terminal of a wireless telecommunications system
2925887051Listening device for tracing line continuity and detecting telephone dial tone
2935881130Fast and noise-insensitive load status detection
2945875245High voltage detection circuit, bell signal detection circuit and non-ringing reception detection circuit
2955875230Interactive measurement system and method for telecommunication networks
2965870451Method and apparatus for high impedance ringer detection
2975864602Qualifying telephone line for digital transmission service
2985862200Ground fault detector for T1 span equipment
2995857011Multi-port caller ID-based telephone ringback test device

1998

3005843028Multi-lumen endoscopic catheter
3015841836Network termination equipment
3025832071Electronic patching system for telecommunications devices
3035832058Test interface adapter emulating no test trunk interface for non-standard central office switch
3045828728Telecommunications network
3055825849Loop-back test system using a suppressed ringing connection
3065818926Switching device for telecommunications channel
3075818905Subscriber line impedance measurement method and measuring circuit
3085809109Integrated ring sensor with fault detection
3095802143Identification of damaged cable pairs in a telecommunications network and restoration of telephone service to subscribers
3105799060Multi-port caller ID-based telephone ringback test device
3115796718Method of and system for intelligent access line protect switching
3125788681Multi-lumen endoscopic catheter
3135778050Portable line test telephone
3145777558Method for detecting fraudulent use of a communication system
3155774524Telephone test device and method of the same for optical cable television system
3165774316Ground fault detector for line-powered telephone network
3175768341Communications channel testing arrangement
3185764726Telecommunications test system including a test and trouble shooting expert system
3195754624Telephone line test kit
3205737389Technique for determining a compression ratio for use in processing audio signals within a telecommunications system
3215726853High voltage protection circuit for telephone test set
3225724421Telephone network interface apparatus
3235722850Telecommunications connectors
3245721773Lightning protected maintenance termaination unit
3255719917Circuit for activating back-up lines
3265717736Testing circuit and method for a codec hybrid balance network
3275710808Telephone dialling code processor

1997

3285703929Wireless-wireline communication selection mechanism resident in craftsperson's portable test and communications device
3295699402Method and apparatus for fault segmentation in a telephone network
3305696809Advanced intelligent network based computer architecture for concurrent delivery of voice and text data using failure management system
3315692925Modular plug comprising circuit elements
3325687214Method and apparatus for remote maintenance procedures
3335685741On demand plug-in jack card and monitor frame
3345677941Channel test unit
3355673255Apparatus for providing service to telephone subscribers connected to a remote terminal from multiple telephone service providers
3365671273Network interface device having switch
3375661776Method and apparatus for performing impedance measurements on a communication line
3385659570Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit
3395652575Maintenance termination unit for telephone circuits
3405651048Communication channel switching arrangement
3415644617Method and apparatus for testing cables
3425638440Protection circuit for telephone systems
3435636262Interface scanning circuit
3445636260Telecommunication customer interface
3455625667Method of predicting voltages in telephone line measurement
3465621782Test interface adapter emulating on test trunk interface for non-standard central office switch
3475617466Mechanism for controllably enabling test set to assert off-hook condition on telephone line in dependence upon detection of prescribed voltage level and absence of data traffic
3485615225Remote measurement unit containing integrated line measurement and conditioning functionality for performing remotely commanded testing and conditioning of telephone line circuits
3495606592Method and apparatus for analyzing resistive faults on telephones cables
3505604785Remotely actuated switch and protection circuit
3515602750Administrative computer and testing apparatus
3525600716Customer-accessible test port for network interface device
3535596623Testing and complaint accepting communication unit
3545596568Apparatus for protecting a telecommunications network from false alarm conditions due to T1 line signal interruption
3555592528Battery charging and signalling interconnect arrangement for craftsperson's

1996

3565586111In-line test switch for communications network
3575583912Wireless - wireline communication selection mechanism resident in craftsperson's portable test and communications device
3585572397Combined overvoltage station protector apparatus having maintenance termination and half ringer circuitry
3595572348Universal demarcation point
3605568547Subscriber circuit provided with a circuit for monitoring a subscriber instrument
3615559854Subscriber's line testing apparatus
3625550894Device for sequentially altering a communication line for remote diagnostic checks
3635544235Identification of called directory number at multiple directory number per line premises prior to ringing signal reception
3645533093Automated trouble-shooting mechanism resident in craftsperson's portable test and communications device
3655528662Active strapping and switching device for telephone line testing
3665528661Diagnostic mechanism for monitoring operational status of remote monitoring and test unit which controllably test and conditions subscriber line circuits
3675528660Display-based control mechanism resident in portable test and communications device for facilitating craftsperson's remote testing of selected portion of telephone network
3685524043Remotely connectable maintenance termination unit
3695521959Programmable source for supplying controllably variable AC/DC voltage output for telephone line measurement apparatus
3705521958Telecommunications test system including a test and trouble shooting expert system
3715515398Modem line probing signal techniques
3725511108Apparatus and method for performing and controlling testing of electrical equipment
3735504801User-controlled electronic modification of operating system firmware resident in remote measurement unit for testing and conditioning of subscriber line circuits
3745504753Control method for a testing system
3755504736Non-invasive link monitor
3765483573Electric circuit connector with auto-termination

1995

3775471517Subscriber system testing method
3785465287Subscriber line impedance measurement device and method
3795452339Local/remote modification of electronically alterable operating system firmware resident in redundant flash memory of remote unit for testing/conditioning subscriber line circuits
3805450469Subscriber interface box
3815450468Method of rapidly assessing damage to outside loop plant
3825444759Method of predicting voltages in telephone line measurement
3835442679Apparatus for use in isolating the cause of a dropped telecommunication call
3845442519Device including a maintenance termination unit and protector
3855440612Method and device for measuring operation parameters of telephone subscriber lines and associated interface circuits
3865440610Mechanism for controlling operation of telephone metallic loop measurement device in dependence upon rate of settling of telephone line voltage
3875440609Telephone tester junction box
3885438606Open power loop detector for transmission line elements
3895436968Digital data-dependent ac impedance termination of telephone line
3905436953Digital longitudinal balance measurement
3915432705Administrative computer and testing apparatus
3925425075Multipurpose analog telephony channel test facility method and apparatus
3935420920Network interface device module providing sealed customer-accessible test port
3945418834Maintenance termination units
3955416825Testing method for subscriber line testing
3965414765Network interface device having switch
3975404388Digital measurement of amplitude and phase of a sinusoidal signal and detection of load coil based on said measurement
3985402465Telephone trouble isolator
3995402073Near-end communications line characteristic measuring system with a voltage sensitive non-linear device disposed at the far end
4005400321Central monitoring system of a multiplex subscriber loop carrier
4015393235Telecommunications test adapter
4025392327Termination unit with maintenance facility

1994

4035377259Data terminal having program language support library, and related method
4045369690Telephone call detecting circuit and a method of remotely accessing and testing a telephone
4055363442Retrofit interface apparatus and method for remote isolation devices
4065361293Line/drop testing from a craft terminal using test unit
4075357556System and method for telephone network testing
4085353327Maintenance termination unit
4095345496Remote line test facility
4105332397Test cord apparatus
4115309499Communications line testing
4125307398Remote controlled tone generator system
4135301050Subscriber loop testing in a fiber-to-the-curb communications network
4145297975Terminal bank for the telecommunication and data technology
4155296850Apparatus and proceses for mapping the connectivity of communications systems with multiple communications paths
4165285100Semiconductor switching device

1993

4175274692Method for testing the line connection before switching from a telephone switching center to be placed out of service to a new digital telephone switching center to be placed into service
4185265156Digital signal cross-connect panel
4195260994Maintenance termination unit module
4205235629Apparatus for telephone line checking
4215222119Communication system and a method, to detect a power exposure of a communication line
4225218616Telephone line tester
4235216702Nonintrusive speech level and dynamic noise measurements
4245195124Testing system for local subscribers
4255193107Speakerphone test set
4265187733Verification of subscriber lines prior to cutover to a new switching system

1992

4275175662Device including an MTU and protector
4285170429Portable telecommunications test instrument with a talk battery circuit
4295163079Analog/digital telephone test set
4305157708Portable telecommunications test instrument with line condition monitoring
4315150402ISDN terminal having diagnostic function
4325128619System and method of determining cable characteristics
4335123041Apparatus for testing telephone cables
4345121420Automatic line defect detector
4355115462Remotely controlled apparatus for conditioning telephone line exclusive of metallic DC bypass pair
4365113426Ground fault detector
4375105438Remotely accessing intelligent network channel terminating equipment device
4385103473Telephone system communication mechanism employing central office sleeve lead

1991

4395073920Method and apparatus of measuring a subscriber line
4405073919Automatically testing telephone lines
4415063585Telephone subscriber line fault detector
4425063584Method for testing subscriber's equipment
4435062131Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative
4445056131Telephone line monitoring circuitry and apparatus
4455054050Drop testing in fiber to the home systems
4465025466Telephone test instrument
4475005197Method and apparatus as for testing a telephone line interface card
4485001741Apparatus for testing and sparing linecard equipment in a telecommunications exchange
4494996702Apparatus for testing spare line circuits in a communication system
4504991196Testing communications systems
4514991195Apparatus and method for testing a telephone circuit protector
4524985917Personal artificial loop (p.a.l.)
4534982325Applications processor module for interfacing to a database system

1990

4544969179Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative
4554962520Composite ringing and coin control voltage detector and method
4564945555Method and means for remote testing of unused telephone lines
4574943993Cable pair tester
4584939765Interlock circuit for preventing corruption of telephone line signals
4594937851Loop status verification system
4604937464Modular jack with loop testing switch
4614924489Customer line tester
4624922516Telephone technician's terminals with auto-selection of dial pulse on DTMF signalling
4634912755Line current test device
4644901004Apparatus and method for mapping the connectivity of communications systems with multiple communications paths

1989

4654879739Wiring test device and method
4664870675Remote testing of metallic loops with a trans hybrid signal
4674864597Cable pair tester
4684862491Remote disconnection and short-circuiting apparatus and method
4694860332Apparatus for the automatic in-circuit testing of subscriber line interface circuits and method therefor
4704852145Telephone subscriber loop test system
4714847885System for measuring and automatically compensating for the distorsions of a connection between a telephone apparatus and a central voice processing unit
4724845737Method for measuring line parameters of subscriber lines of a telecommunication system
4734841560Direct access test unit for central office
4744841559Telephone network interface tester
4754837811Telephone technician's terminals
4764827497Electronic trigger switch for maintenance termination unit
4774825466Telephone interface security device
4784825458Subscriber telephone equipment test apparatus
4794815119Testing transmission links
4804807277Remotely activated switching apparatus
4814799251ESS equipment testing device
4824797622Technique for determining the values of circuit elements in a three terminal equivalent circuit
4834796289Multi-line network interface

1988

4844791659Remote test telephone line access system
4854788710Telephone line selection and isolation method and apparatus
4864777645Telephone line test and display circuit
4874774722Telephone line activity monitoring method and device
4884774721Cable pair to telephone number verification system
4894771451Polarity ring director
4904766594Digital network system having arrangement for testing digital subscriber line
4914764950Snap-on network interface unit
4924764949Subscriber/craftsperson ringback apparatus
4934756017Telephone test device
4944754472Telecommunication systems
4954748652Circuit for detecting abnormality in feeder
4964748651Multiline transmission line test receptacle with provision for testing each line
4974741016Special service signal tester
4984729126Method and apparatus for supervising the accessing and testing of communication systems

1987

4994710949Telephone line fault locating device
5004709386Subscriber line monitoring circuit
5014707851Remote isolation test apparatus
5024707848Test set communication/interface system
5034701699Telephone station testing apparatus
5044700380Solid state remote actuable switch
5054691337Method and apparatus for determining the value of analog voltages occurring on telephone subscriber lines of a digital telephone exchange
5064691336Telephone test set having an auxiliary amplifier and speaker for permitting listening to line signals
5074686696Transmission line signal sensing circuit employing means for conserving power, especially for use with a telephone disconnect circuit, and associated method
5084685120Electronic trigger switch for maintenance termination unit
5094682347Telephone line selection and isolation method and apparatus
5104682346Telephone test set
5114682345Adapter for coupling together two subscribers' lines to a telephone test set
5124679224Telephone line testing circuit
5134675899Frequency ring director
5144670898Direct access test unit for central office
5154669112Automatic telephone number indicating device
5164669111Polarity ring director
5174663775Method and apparatus for testing remote communication systems
5184661969Communication lines with terminate and leave capability-VF data bridge
5194653084Remote actuated switch
5204647724Ringing interface card for telephone test equipment
5214645874Message routing through data communication networks
5224641299Mechanized loop testing using a local metallic access port
5234639557Remote testing system for electrical circuits
5244639555Pair cut apparatus and method of use
5254636939Parallel bus protocol

1986

5264631368Switching system for readily accessing the service line for test basic unit and the switching system for readily accessing the service line for test expansion unit
5274629836Method and apparatus for accessing communication systems
5284629835Fault isolating apparatus system and method
5294628158Stored program controller
5304626633In-line switched telephone line tester
5314626632Maintenance termination unit
5324622438Subscriber line radio concentration system with automatic response for a loop back test
5334620070Telephone line tester
5344620069Method and apparatus to determine whether a subscriber line is loaded or non-loaded
5354614844Telephone service checking terminal
5364611101Method and apparatus for testing communication systems
5374605827Line fault discriminator
5384602338Impedance measurement in 4-wire to 2-wire converters
5394600810Telephone line tester
5404594704Spare subscriber terminal device in a digital concentrator
5414590583Coin telephone measurement circuitry
5424582960Subscriber network interface device
5434581494Telephone interface-test device
5444581493Line condition reporting system
5454578761Separating an equivalent circuit into components to detect terminating networks
5464575588Universal telephone test apparatus
5474570037Fault detection in a telephone cable pressure monitoring system
5484564728Apparatus for testing a telephone line

1985

5494562436Data communication network
5504562313Electrical systems comprising temperature-sensitive devices
5514560842Telecommunication system loop-back unit
5524558188Arrangement for line jumper testing
5534558182Remotely-activated switching apparatus
5544554642Digital filtering with monitored settling time
5554550225AC Signal-activated switching apparatus
5564550223Test device, and method for locating faults in a two-lead line
5574544809Arrangement for subscriber line ring testing
5584544807Fault detector test instrument
5594543524Biased reactor maintenance termination unit
5604539652Networks for data communication
5614538033Data bridge with gating and/or testing
5624536706Magnetic current sensor
5634536617Remotely-activated switching apparatus
5644533864Test instrument with flexibly connected head
5654529847Maintenance termination unit
5664528427Test system and device for locating short circuits and open circuits in a two-lead line
5674525795Digital signal generator
5684525789Programmable network tester with data formatter
5694517513Magnetic differential current sensor
5704516070Magnetic current sensor with offset and load correction
5714513179Loop test circuit
5724496801Splicing module test set

1984

5734489221Telephone line/subscriber equipment disconnect apparatus
5744489220Test set
5754488008Telephone network interface device
5764486627Cable load status detector
5774485271Remotely actuable line disconnect device
5784467149Compensation method and apparatus for use with nonideal test access lines
5794467147Switching network for interactive access and testing of subscriber loops
5804464621Test device for and method of locating faults in a two-wire line or for switching two-wire lines
5814459437Test system for locating breaks and short circuits in a two-lead line
5824459436Programmable tester for measuring network characteristics
5834454388Arrangement for subscriber line verification and ring testing
5844453049Arrangement for single line testing
5854453048Arrangement for subscriber line ring testing
5864451708Spare subscriber terminal apparatus
5874447679Subscriber line testing system
5884446341Mechanized testing of subscriber facilities
5894446340Customer premises loop test unit powered from the normal central office power source
5904445007Remote testing of subscriber line interface circuits
5914440985Apparatus for determining the location of faults in a transmission line
5924440984Method of testing telephone cable pairs
5934438299On-line telephone troubleshooting apparatus
5944438298System for accessing and testing subscriber loops
5954434328Remotely actuated telephone instrument connection block having instrument lockout feature
5964424421Apparatus for testing subscriber carrier systems

1983

5974415779Methods of and apparatus for testing telephone subscriber loop to locate a fault relative to a reference point
5984415778Subscriber telephone test set
5994413163Portable line tester for telecommunication system
6004404636Phasor impedance measuring test set
6014401861Semiconductor crosspoint linearizing arrangement
6024399333Telephone fault detection system
6034396809Maintenance termination unit
6044395651Low energy relay using piezoelectric bender elements
6054394543Telephone line holding circuit
6064392026Subscriber line testing system
6074388501Audio-visual line test termination device
6084386243Telephone test shoe having resilient latching means
6094385336Current supplying circuit with shorted-to-ground fault detecting function
6104373121Maintenance termination device
6114373120Line test termination device
6124369341Customer line test termination device
6134368363Audible line test termination device

1982

6144355209Programmable line circuit
6154350849Varying impedance line test termination device
6164334129Telephone digital office cutover system
6174331913Precision negative impedance circuit with calibration
6184320338Methods of and apparatus for determining the capacitance of a transmission line by integrating line currents

1981

6194301334Telecommunication subscriber line access circuit with ground key and insulation fault indication
6204292480Method and apparatus for locating telephones
6214270030Testing of subscriber loop pair gain systems
6224258236Remote telephone line switching and testing

1980

6234218592Telephone analyzer for detection of clandestine devices
6244213013Telephone network/subscriber interface device
6254209671Method and apparatus for testing the tip-ring polarity of telephone receptacles connected in parallel to a non-working pair
6264197435Telephone line monitoring circuit and method
6274186282Method and apparatus for measuring telephone line characteristics
6284185174Method and apparatus for checking connection paths in a telephone exchange

1979

6294173736Capacitance detecting system and method for testing wire connections
6304169220Telephone instrument connection block with remotely actuated line test
6314164632Signalling system for overvoltage protectors
6324143250Telephone isolation system
6334139745Telephone line test system

1978

6344126771Telephone line lifting apparatus
6354117264Diode package for use with a central office connector module
6364113998Testing electrically conductive lines to determine electrical characteristics thereof
6374085298Measurement of current through a line subject to spurious high potentials
6384079210Ringing and testing control circuitry for communication systems
6394076971Subscriber line testing system

1977

6404056687Decoupling control arrangement for auxiliary circuits coupled to telephone lines
6414054760Remote testing of telephone loops
6424054759Subscriber loop verification device and method
6434051333Tip and ring conductor voltage tester
6444045624Continuous monitoring in carrier telephone systems
6454041255Switching circuit for telecommunications lines
6464034162Telephone receiver-off-hook detector
6474034161Telephone receiver-off-hook detector
6484028507Apparatus for applying particular voltages to three-terminal circuits and measuring resulting current flows for the purpose of determining circuit characteristics
6494022989Telephone receiver-off-hook-and-in-use detector

1976

6503983338Apparatus and method to test the condition of an electrical service line and to determine the presence and/or removal of electrical equipment connected to the line
6513976849Telephone wiring tester
6523973090Telephone number assignment record verification apparatus and method
6533969594Automated telephony testing and polling apparatus and system
6543959605Circuit for detecting loss of telephone line voltage
6553943305Telephone line control system
6563941950Telephone line testing instrument having a supervising capability
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017