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2017

19596344System and method for encrypting and recording media for a contact center
29565296Call event tagging and call recording stitching for contact center call recordings

2016

39479637Systems and methods for establishing a diagnostic transmission mode and communicating over the same
49439082Mobile device audio indications
59392113System and method for automated chat testing
69384121Functional test automation for gesture-based mobile applications
79319512Systems and methods for establishing a diagnostic transmission mode and communicating over the same
89319511Management and diagnosis of telephonic devices
99294615System and method for handling call recording failures for a contact center
109264533Systems and methods for establishing a diagnostic transmission mode and communicating over the same

2015

119178989Call event tagging and call recording stitching for contact center call recordings
129154611Functional test automation for gesture-based mobile applications

2007

137286646Subscriber line validation of a telephone network

2005

146950497Fault location in a telecommunications network
156947546Hook-flash simulation in parallel with off-hook devices
166940949Ring, tip, ground testing tool
176925173Optimization of a DSL-compatible POTS line card
186915250Customer premises simulation for a service provider
196914963Determining the composition of subscriber loops from frequency domain measurements
206914962Call-flow verification method and apparatus
216912269Test unit for use at a network interface device
226904130Test unit for interface between telephone company demarcation point device and customer's telephone system
236901358Communication media simulation for a service provider
246901137Detecting faults in subscriber telephone lines
256898272System and method for testing telecommunication devices
266895081Predicting performance of telephone lines for data services
276894504Technique for estimation of a subscriber line insertion loss
286891929Automated and integrated call control server
296888925Method for testing large-scale audio conference servers
306876739Method and apparatus for demonstrating telecommunications products
316876725Single ended line probing in DSL system
326873685Digital subscriber line access and network testing multiplexer
336873684System and method for estimating the capacity of a local loop to carry data
346870900Proactive maintenance application
356870899ADSL loop qualification systems and methods
366868060Circuit to provide backup telephone service for a multiple service access system using a twisted pair
376865257Method for resolving trouble in a connection having a plurality of components
386865221Systems and methods for loop length and bridged tap length determination of a transmission line
396856683Method for reducing noise from a non-linear device that shares a customer loop with an asymmetric digital subscriber line modem
406853708End-to-end network testing

2004

416829330Systems and methods for loop characterization from double-ended measurements
426829293Method and apparatus for line probe signal processing
436826261Subscriber testing system
446826259Method for emulating a terminal and test apparatus for testing a telecommunication network
456826258System and method for pre-qualification of telephone lines for DSL service using an average loop loss
466826155Apparatus and method for facilitating standardized testing of signal lines
476819745Method and apparatus of testing a POTS circuit and DSL circuit through a splitter
486812827System and method for testing and maintaining a predetermined physical bit rate on a line connection
496804328Intelligent line testing
506801601Single ended line probing in DSL system using transformerless hybrid
516801307Modular measuring or testing device
526798830Methods and apparatus for generating a test signal for xDSL devices
536795703System and method for upgrading mobile handset
546788784Circuit arrangement for signaling in telecommunications networks
556785362Method and apparatus for checking the functionality of a switching center
566778931Test and measurement instrument having multi-channel telecommunications mask testing capability
576771739Pressure alarms and reports system module for proactive maintenance application
586765988Automated dispatching from a telephone cable air pressure monitoring system
596763108Apparatus and method for line pair testing and fault diagnostics
606763087Mobile VDSL signal detector
616754309Communication device and access network device
626751295Method and apparatus for measuring communication market statistics
636751253Communication port-powered digital communication interface for upgrading software-reconfigurable test set
646748050Method 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
656744853Testing of telephone lines
666744813System and method for estimating noise characteristics in the presence of non-stationary noise
676741676Determining the physical structure of subscriber lines
686738455Apparatus and method for testing subscriber lines and equipment
696731738Call tones in communication networks
706728648Test and measurement instrument having telecommunications mask testing capability with an autofit to mask feature
716728362Continuity testing with call tone messaging in communication networks
726721394Method for reducing noise from an asymmetric digital subscriber line modem
736718019Method and apparatus for wireline characterization
746707886Method and system for testing subscriber loops using touchtone telephone signals
756697421Operator independent, transparent wireless modem management
766694015Universal line interface in telecommunications system
776693992Line probe signal and method of use
786690769Hand-held telecommunication loop testing device
796690720Automated testing of modem training
806687336Line qualification with neural networks
816687289Method for measuring the attenuation in digital transmission lines
826674840Systems and methods for verifying the provisioning of advanced intelligent network services

2003

836668059Telephone tuning and signaling system
846668041Single ended line probing in DSL system
856661850Testing system of voice-band data transmission interface on an exchange
866658052Systems and methods for establishing a diagnostic transmission mode and communicating over the same
876651189Communication network disturbance management method using top-down method
886650732Telephony testing system
896643266Method for qualifying a loop for DSL service
906642926Test and measurement instrument having telecommunications mask testing capability with a mask zoom feature
916640318Continuity testing in communication networks
926639983Adaptable line driver interface for digital telephone systems
936636841System and method for telecommunications system fault diagnostics
946633642Balance network directional coupler system and method
956633628Apparatus and method for selecting a supported signal path for a transceiver
966631178System and method for transmitting data over loaded and unloaded twisted pairs
976628756System and method for telephone number verification and identification
986628754Method for rapid noise reduction from an asymmetric digital subscriber line modem
996625269Method of monitoring digital line signal in private exchange system
1006625255Apparatus and method for communications loop characterization
1016614881Remotely operable telecommunications conductor test circuit and method for using the same
1026614880Automated telephone line test apparatus with intelligent diagnostic function
1036611579Method for predicting and diagnosing trouble in a connection having a plurality of components
1046608885Method system and device for line monitoring
1056606719Method and arrangement to estimate transmission channel characteristics
1066606372System and method of testing an IDSL communications line
1076603853Method and apparatus for demonstrating telecommunications products
1086597782Method and apparatus for providing control and input sensing in a signal transfer point
1096594343Splitter bypass architecture for testing multiple ports
1106590962Method of performing non-interactive resistive fault location
1116587543System and method for the automated testing of a telecommunications system
1126584176Loop loss measurement and reporting mechanism for digital data services telephone channel equipment
1136584148System and method for testing digital subscriber lines
1146580782Interactive telephone response module
1156577711Methods for detecting defective communications lines
1166574310Apparatus and method for a wide band spectral balance measurement
1176574309Remotely actuated splittler bypass system and method
1186566889Line diagnostics for wireline modems
1196564227Customer support system
1206556661In-line telephony data protector with line condition announce
1216553105Enabling and powering of remotely actuated bypass splitters
1226549610Subscriber circuit having splitter disconnection function
1236538451Single ended measurement method and system for determining subscriber loop make up
1246535581Bypass for telephone system splitter
1256535580Signature device for home phoneline network devices
1266535579Network interface device with disconnectable half-ringer
1276532216Central office based ADSL test platform
1286531879Method and apparatus for delay-line time-domain reflectometry
1296529583PSTN call simulator and method of operation for testing PSTN-To-IP network telephone services for individual and group internet clients prior to availability of the services
1306522731Data communication apparatus
1316519323Test unit for use at a network interface device
1326519322Apparatus and method for testing subscriber loop interface circuits
1336519320State monitoring method and apparatus in subscriber line test
1346519228System and method of operation for verifying and validating public switch telephone networks (PSTN) to (IP) network services
1356516054Method for adjusting current levels, which have been falsified by offset-current levels, in a subscriber line circuit
1366516053System and method for testing telecommunication service installations
1376516052Method of scheduling connections
1386516049Method and apparatus for insertion loss estimation in wireline communications
1396507870xDSL web ordering tool
1406507737Method for automatically monitoring continuity and integrity of communication trunks
1416504906Telephone micro-tester and transport system

2002

1426490342Method for quickly testing the operability of a subscriber circuit
1436487276Detecting faults in subscriber telephone lines
1446487196System and method for simulating telephone use in a network telephone system
1456483909System and method for providing service assurance for prepaid telecommunication services
1466480576Method and device for detecting path faults in a network
1476480575Structure and circuit topology for a remotely actuated bypass splitter
1486477238Loop certification and measurement for ADSL
1496470074System and method for providing data and voice services on a shared line
1506466650Telecom service identification transponder apparatus and technique
1516466647System and method for estimating the capacity of a local loop to carry data
1526463126Method for qualifying a loop for DSL service
1536459773System to pre-qualify copper subscriber loops for high bandwidth access service using subscriber or network generated tones
1546456694Method for prequalifying subscriber lines for high speed data service
1556453016Method and apparatus for detecting and locating a fault in a telecommunications environment
1566453015Telephony testing system
1576453014Test access and performance monitoring system and method for cross-connect communication network
1586445773DMT test method for determining ADSL capability of cables
1596442239Telephone line longitudinal balance tester and method
1606438212Automated telephone line test apparatus with intelligent diagnostic function
1616434221Digital subscriber line access and network testing multiplexer
1626421424Client simulator and method of operation for testing PSTN-to-IP network telephone services for individual & group internet clients prior to availability of the services
1636418195Apparatus for communicating a diagnostic device with a telecommunications system through a remote network unit
1646418160Method for testing a communication channel
1656416352Telecommunication apparatus test module with deflectable circuit switching contact
1666411680Telephonic apparatus and input device for telephonic apparatus
1676411679Apparatus and method for call progress timing measurement in IP telephony
1686393102Computer-executable method for diagnosing trouble causes in telephone cable segments when trouble data are available only for entire cables
1696389111Measurement of signal quality
1706389110Telecom service identification resonator apparatus and technique
1716389109Fault conditions affecting high speed data services
1726385299Line testing in a telecommunications network
1736385297Method and apparatus for qualifying loops for data services
1746385296System to test a connection in a telephone network
1756373923Line testing method and apparatus therefor
1766373259Connector testing system having a test prong including a projection
1776370230Method and system for diagnosing and testing modems and intermachine trunks
1786366645System and method for providing service assurance for prepaid telecommunication services
1796366644Loop integrity test device and method for digital subscriber line (XDSL) communication
1806363335Communications bridge for circuit switched data transfer simulation
1816356624Method and apparatus for detecting and measuring foreign voltages
1826351521Communications test system
1836349130Method to pre-qualify copper loops for ADSL service
1846347075Circuit to provide backup telephone service for a multiple service access system using a twisted pair
1856343114Remotely addressable maintenance unit
1866341159Extrapolation of location and amplitude of noise sources on telecommunication wireline from ended access point
1876341158Telephony Test Technique
1886337846Quantification of the quality of spare links in a telecommunications network

2001

1896330306Test device for telephone lines
1906320939Remote telephony testing device
1916304655Signal capture for telecommunications switch
1926304634Testing telecommunications equipment
1936304633Testing system for voice system equipment in switchboard
1946301337Combined handset and POTS filter
1956301227Systems and methods for allowing transmission systems to effectively respond to automated test procedures
1966298118System and method for processing of communication line test signals, such as enhancement processing
1976295351System and method for invocation of a check of a telecommunications application through use of a call probe
1986295339Audio verification of digital subscriber line connection
1996292909Apparatus for testing communication equipment
2006292540Battery injection and loop supervision for DSL environment
2016292539Method and apparatus for digital subscriber loop qualification
2026285744Telephony test system with adjustable output impedance
2036285194Customer bridge with built-in test access
2046282277Unbundling device and method for connecting a competing local exchange carrier (CLEC) to the subscriber loop of a local exchange carrier (LEC)
2056279124Method and system for testing hardware and/or software applications
2066278769Signaling method for invoking a test mode in a network interface unit
2076275571System for direct suppressed ringing access of subscriber lines
2086269150Reliable, unattended, automated testing system and method for complex telecommunication systems
2096266395Single-ended subscriber loop qualification for xDSL service
2106266326Apparatus for loop testing in a communication system
2116265842Cross-connect method and apparatus
2126263076Arrangement in a subscriber line interface circuit
2136263068Remote subscriber line unit provisioning system for use with voice communication facilities
2146263065Method and apparatus for simulating central queue for distributing call in distributed arrangement of automatic call distributors
2156259768Method of, and apparatus for, carrying out loopback test in exchange
2166259676Upgrading of subscriber connection
2176256377Loop loss measurement and reporting mechanism for digital data services telephone channel equipment
2186252942Wireless butt set
2196246748Power feeding system using two-wire subscriber lines
2206233312Inter-circuit line fault location in telecommunication networks
2216219406Back wiring board and aggregated device
2226215855Loop certification and measurement for ADSL
2236215854Digital signal processor-based telephone test set analyzing and displayed multiple signal parameter data for terminal mode and line monitor mode operation
2246212258Device for remotely testing a twisted pair transmission line
2256209108Method for testing VDSL loops
2266201854System and method for telephone number verification and identification
2276201853Telephone technician's remote assist apparatus and method
2286195415Communication line test apparatus for a mobile radio system
2296195414Digital facility simulator with CODEC emulation
2306185280Line impedance matching using dynamically generated transfer functions
2316185191Testing of ISDN line via auxiliary channel signaling
2326185083Protected telecommunication test adapter module
2336181775Dual test mode network interface unit for remote testing of transmission line and customer equipment
2346173244System and method for testing a switching system in a telecommunication network
2356173040Telephone line state detecting device
2366169785Apparatus and method for testing subscriber line
2376169784Telecommunication line termination test
2386169783Line testing in a telecommunications network
2396169724Egress network service monitor

2000

2406163595Way finding with an interactive faceplate
2416160871Communications test system
2426160794Method and system to obtain test information regarding an advanced service in a telecommunications system
2436157704Subscriber line test system for access network
2446154523Method and system for linking a toll switch
2456154447Methods and apparatus for detecting and locating cable failure in communication systems
2466144722System and method for programmable telephone subscriber line test in ring mode
2476144721Apparatus and method for line pair testing and fault diagnostics
2486142682Simulation of computer processor
2496134515Controlling a first type telecommunications switch upon translating instructions for a second type telecommunications switch
2506134302Voice path testing in telecommunications system
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
2576104782Method for measuring quality determining parameters of a firmly connected communications transmission link
2586091802Telecommunication system tester with integrated voice and data
2596084945Perfected protection and cutting unit by rotational control device, for connection and testing modules of telephone lines
2606079036Call message with traveling log for testing intelligent telecommunications network
2616058161System and method for programmable telephone subscriber line test
2626055299Connector block with built-in array test feature
2636044355Skills-based scheduling for telephone call centers
2646039578Network interface device for line testing
2656038544System and method for determining the performance of a user responding to a call
2666038303Method and apparatus for remotely activating services in a telecommunications network
2676026146Automated voice terminal protocol identification system
2686026145Method and apparatus for fault segmentation in a telephone network
2696014425Apparatus and method for qualifying telephones and other attached equipment for optimum DSL operation
2706011830Operational test device and method of performing an operational test for a system under test

1999

2716008654Method and apparatus for testing lines in a telecommunications network
2726002746Line testing in a telecommunications network
2736002671Test instrument for testing asymmetric digital subscriber lines
2745999593System and method for automatic PBX detection
2755995617Connector block mountable connector and telephone circuit
2765995587Method of controlling time switch for diagnosing failure on call path
2775982852Line performance test system
2785982815Circuit 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
2795978449Qualifying telephone line for digital transmission service
2805974363Self-testing of smart line cards
2815974115System and method for testing subscriber lines and terminating equipment from a service platform
2825966439Modular telephone line connecting disconnecting and testing block
2835966427Apparatus and method for troubleshooting internet protocol telephony networks
2845960062Method of recording the communication between a CPE and a SPCS/server
2855956386Telephone subscriber line diagnostics system and method
2865956385Test set interface for automatically detecting line type
2875956384Apparatus and method for automatically detecting defective lines in a cable and for automatically switching from the defective line to an extra line
2885953390Device for inducing a wink in a telephone system
2895946474Simulation of computer-based telecommunications system
2905937034Method for testing call waiting, caller ID functionality of telephone line
2915937033Telephone system diagnostic measurement system including a distant terminal drop test measurement circuit
2925933479Remote service system
2935933475System and method for testing a telecommunications apparatus
2945930334Method and apparatus for monitoring the operation of telecommunications equipment
2955917885Method and system for testing subscriber circuits and wiring in a cable communication system
2965912960Method and apparatus for remotely activating services in a telecommunications network
2975912629Subscriber interface control method
2985907614High density telephone network interface unit
2995903624Data terminal for telephone circuits
3005901201Switch-based line continuity verification method and system
3015901024Apparatus and method for circuit protection
3025898921Monitoring of the operation of a subscriber unit
3035896569Wireless access to telephone network dial tone
3045892756Portable telecommunication network testing device
3055889837Testing a subscriber terminal of a wireless telecommunications system
3065887051Listening device for tracing line continuity and detecting telephone dial tone
3075881130Fast and noise-insensitive load status detection
3085875245High voltage detection circuit, bell signal detection circuit and non-ringing reception detection circuit
3095875230Interactive measurement system and method for telecommunication networks
3105870451Method and apparatus for high impedance ringer detection
3115867689Method and apparatus for emulating a digital cross-connect switch network using a flexible topology to test MCS network management
3125864602Qualifying telephone line for digital transmission service
3135862319Dynamic data tool for testing record processing systems
3145862200Ground fault detector for T1 span equipment
3155857011Multi-port caller ID-based telephone ringback test device

1998

3165850536Method and system for simulated multi-tasking
3175843028Multi-lumen endoscopic catheter
3185841836Network termination equipment
3195832071Electronic patching system for telecommunications devices
3205832058Test interface adapter emulating no test trunk interface for non-standard central office switch
3215828728Telecommunications network
3225825850Automatic bypass switch for signal conductor
3235825849Loop-back test system using a suppressed ringing connection
3245822397Audio interface for telecommunications test system
3255818926Switching device for telecommunications channel
3265818905Subscriber line impedance measurement method and measuring circuit
3275818904Collaborative trunk testing method and system
3285818903CDMA mobile automatic call simulating method and simulator therefor
3295812934Method and apparatus for a cross-connect system with automatic facility information transference to a remote location
3305809286Method and apparatus for emulating a dynamically configured digital cross-connect switch network
3315809109Integrated ring sensor with fault detection
3325809108Automated test call generation and execution system
3335802143Identification of damaged cable pairs in a telecommunications network and restoration of telephone service to subscribers
3345802141Electronic private branch exchange
3355799060Multi-port caller ID-based telephone ringback test device
3365796718Method of and system for intelligent access line protect switching
3375793864Nonintrusive measurement of echo power and echo path delay present on a transmission path
3385788681Multi-lumen endoscopic catheter
3395784558Method and apparatus for testing of extended ISDN BRI service
3405778050Portable line test telephone
3415777558Method for detecting fraudulent use of a communication system
3425774524Telephone test device and method of the same for optical cable television system
3435774316Ground fault detector for line-powered telephone network
3445768341Communications channel testing arrangement
3455764726Telecommunications test system including a test and trouble shooting expert system
3465764725Apparatus for testing the line continuity of telephone switch equipment
3475761273Analog self-test circuitry for a trunk interface
3485761272Method of and system for performing telecommunications stress testing
3495754624Telephone line test kit
3505748617Method and apparatus for emulating a digital cross-connect switch network
3515737389Technique for determining a compression ratio for use in processing audio signals within a telecommunications system
3525734696Testing telecommunications equipment
3535729588Enhanced recording verification system
3545726853High voltage protection circuit for telephone test set
3555724421Telephone network interface apparatus
3565722850Telecommunications connectors
3575721773Lightning protected maintenance termaination unit
3585719917Circuit for activating back-up lines
3595717736Testing circuit and method for a codec hybrid balance network
3605710808Telephone dialling code processor
3615708364Cable monitoring system with multiple branch terminations
3625706328Automated inbound test facility and method

1997

3635703929Wireless-wireline communication selection mechanism resident in craftsperson's portable test and communications device
3645699402Method and apparatus for fault segmentation in a telephone network
3655696809Advanced intelligent network based computer architecture for concurrent delivery of voice and text data using failure management system
3665692925Modular plug comprising circuit elements
3675687214Method and apparatus for remote maintenance procedures
3685685741On demand plug-in jack card and monitor frame
3695677941Channel test unit
3705673255Apparatus for providing service to telephone subscribers connected to a remote terminal from multiple telephone service providers
3715671273Network interface device having switch
3725661776Method and apparatus for performing impedance measurements on a communication line
3735659570Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit
3745652791System and method for simulating operation of an automatic call distributor
3755652712Method and apparatus for calibration of digital test equipment
3765652575Maintenance termination unit for telephone circuits
3775651048Communication channel switching arrangement
3785644617Method and apparatus for testing cables
3795640433Conversion of synchronous/asynchronous signals
3805638440Protection circuit for telephone systems
3815636262Interface scanning circuit
3825636260Telecommunication customer interface
3835633909Apparatus and method for generating calls and testing telephone equipment
3845627834Code division multiple access (CDMA) automatic call simulator
3855625667Method of predicting voltages in telephone line measurement
3865621782Test interface adapter emulating on test trunk interface for non-standard central office switch
3875621670Communication service simulator and a communication service specification verifying method
3885617466Mechanism 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
3895615225Remote measurement unit containing integrated line measurement and conditioning functionality for performing remotely commanded testing and conditioning of telephone line circuits
3905606592Method and apparatus for analyzing resistive faults on telephones cables
3915604785Remotely actuated switch and protection circuit
3925602750Administrative computer and testing apparatus
3935600716Customer-accessible test port for network interface device
3945596623Testing and complaint accepting communication unit
3955596568Apparatus for protecting a telecommunications network from false alarm conditions due to T1 line signal interruption
3965592528Battery charging and signalling interconnect arrangement for craftsperson's

1996

3975588047Interface for simulating a telephone line connection between two devices for establishing a communication path between the devices
3985586111In-line test switch for communications network
3995583912Wireless - wireline communication selection mechanism resident in craftsperson's portable test and communications device
4005579368Device for monitoring a switch
4015577197Test system for testing electronic transaction processing services at a common carrier network switch
4025577099Inductive amplifier having comb filter
4035574769Inductive amplifier having automatic gain control for butt set
4045572570Telecommunication system tester with voice recognition capability
4055572397Combined overvoltage station protector apparatus having maintenance termination and half ringer circuitry
4065572348Universal demarcation point
4075568547Subscriber circuit provided with a circuit for monitoring a subscriber instrument
4085559854Subscriber's line testing apparatus
4095557651Signal generator for tracing multiple transmission lines
4105550894Device for sequentially altering a communication line for remote diagnostic checks
4115544235Identification of called directory number at multiple directory number per line premises prior to ringing signal reception
4125539802System for testing the billing function in a telecommunication system
4135533093Automated trouble-shooting mechanism resident in craftsperson's portable test and communications device
4145533092Order wire in telephone communication system
4155528662Active strapping and switching device for telephone line testing
4165528661Diagnostic mechanism for monitoring operational status of remote monitoring and test unit which controllably test and conditions subscriber line circuits
4175528660Display-based control mechanism resident in portable test and communications device for facilitating craftsperson's remote testing of selected portion of telephone network
4185524043Remotely connectable maintenance termination unit
4195521959Programmable source for supplying controllably variable AC/DC voltage output for telephone line measurement apparatus
4205521958Telecommunications test system including a test and trouble shooting expert system
4215515398Modem line probing signal techniques
4225511108Apparatus and method for performing and controlling testing of electrical equipment
4235504801User-controlled electronic modification of operating system firmware resident in remote measurement unit for testing and conditioning of subscriber line circuits
4245504753Control method for a testing system
4255504736Non-invasive link monitor
4265502756Remote test call unit and service
4275483573Electric circuit connector with auto-termination

1995

4285479608Group facility protection in a digital telecommunications system
4295479473Method and apparatus for testing call paths over long distance carrier networks
4305473666Method and apparatus for digitally controlling gain in a talking path
4315471517Subscriber system testing method
4325465287Subscriber line impedance measurement device and method
4335463670Testing of communication services and circuits
4345463632Testing unit by which communication links can be selected and tested, and method thereof
4355457729Communication network signalling system link monitor and test unit
4365452339Local/remote modification of electronically alterable operating system firmware resident in redundant flash memory of remote unit for testing/conditioning subscriber line circuits
4375450469Subscriber interface box
4385450468Method of rapidly assessing damage to outside loop plant
4395448624Telephone network performance monitoring method and system
4405444759Method of predicting voltages in telephone line measurement
4415442679Apparatus for use in isolating the cause of a dropped telecommunication call
4425442519Device including a maintenance termination unit and protector
4435440612Method and device for measuring operation parameters of telephone subscriber lines and associated interface circuits
4445440610Mechanism for controlling operation of telephone metallic loop measurement device in dependence upon rate of settling of telephone line voltage
4455440609Telephone tester junction box
4465438606Open power loop detector for transmission line elements
4475436968Digital data-dependent ac impedance termination of telephone line
4485436953Digital longitudinal balance measurement
4495432705Administrative computer and testing apparatus
4505425075Multipurpose analog telephony channel test facility method and apparatus
4515420920Network interface device module providing sealed customer-accessible test port
4525420915Apparatus for instruction in use of telephone
4535418834Maintenance termination units
4545416825Testing method for subscriber line testing
4555414765Network interface device having switch
4565410586Method for analyzing an IDNX network
4575404388Digital measurement of amplitude and phase of a sinusoidal signal and detection of load coil based on said measurement
4585402465Telephone trouble isolator
4595402073Near-end communications line characteristic measuring system with a voltage sensitive non-linear device disposed at the far end
4605400321Central monitoring system of a multiplex subscriber loop carrier
4615393235Telecommunications test adapter
4625392327Termination unit with maintenance facility
4635384822Computer controlled test facility for a telecommunication switch

1994

4645377259Data terminal having program language support library, and related method
4655369690Telephone call detecting circuit and a method of remotely accessing and testing a telephone
4665365578Method and system for transferring special circuit telephone pairs
4675363442Retrofit interface apparatus and method for remote isolation devices
4685361293Line/drop testing from a craft terminal using test unit
4695359646Testing of distributed communications networks
4705357556System and method for telephone network testing
4715353327Maintenance termination unit
4725353326Method for performing continuity check in an electronic exchange system
4735345496Remote line test facility
4745335339Equipment and method for interactive testing and simulating of a specification of a network system
4755332397Test cord apparatus
4765329520High-speed facility protection in a digital telecommunications system
4775309499Communications line testing
4785307398Remote controlled tone generator system
4795301050Subscriber loop testing in a fiber-to-the-curb communications network
4805299257Subscriber initiated non-intrusive network-based analysis of facsimile transmissions
4815297975Terminal bank for the telecommunication and data technology
4825296850Apparatus and proceses for mapping the connectivity of communications systems with multiple communications paths
4835285100Semiconductor switching device

1993

4845274692Method 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
4855265156Digital signal cross-connect panel
4865260994Maintenance termination unit module
4875241584Response time evaluation unit
4885235629Apparatus for telephone line checking
4895222119Communication system and a method, to detect a power exposure of a communication line
4905218616Telephone line tester
4915216702Nonintrusive speech level and dynamic noise measurements
4925195124Testing system for local subscribers
4935193107Speakerphone test set
4945187733Verification of subscriber lines prior to cutover to a new switching system
4955185570Telecommunications signal detector

1992

4965175662Device including an MTU and protector
4975170429Portable telecommunications test instrument with a talk battery circuit
4985163079Analog/digital telephone test set
4995157708Portable telecommunications test instrument with line condition monitoring
5005150402ISDN terminal having diagnostic function
5015128619System and method of determining cable characteristics
5025123041Apparatus for testing telephone cables
5035121420Automatic line defect detector
5045115462Remotely controlled apparatus for conditioning telephone line exclusive of metallic DC bypass pair
5055113426Ground fault detector
5065105438Remotely accessing intelligent network channel terminating equipment device
5075103473Telephone system communication mechanism employing central office sleeve lead

1991

5085073920Method and apparatus of measuring a subscriber line
5095073919Automatically testing telephone lines
5105065422Subscriber call simulator capable of testing new services of a telephone switching system
5115063585Telephone subscriber line fault detector
5125063584Method for testing subscriber's equipment
5135062131Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative
5145056131Telephone line monitoring circuitry and apparatus
5155054050Drop testing in fiber to the home systems
5165049873Communications network state and topology monitor
5175025466Telephone test instrument
5185005197Method and apparatus as for testing a telephone line interface card
5195003573Self-diagnosis of loop start and ground start trunk interfaces
5205001741Apparatus for testing and sparing linecard equipment in a telecommunications exchange
5214996702Apparatus for testing spare line circuits in a communication system
5224991196Testing communications systems
5234991195Apparatus and method for testing a telephone circuit protector
5244985917Personal artificial loop (p.a.l.)
5254982325Applications processor module for interfacing to a database system

1990

5264969179Telephone line monitoring circuit for providing a visual and auditory signal if the telephone line becomes inoperative
5274962520Composite ringing and coin control voltage detector and method
5284945555Method and means for remote testing of unused telephone lines
5294945554Test circuit arrangement for computer-controlled communications switching systems
5304943993Cable pair tester
5314939765Interlock circuit for preventing corruption of telephone line signals
5324937851Loop status verification system
5334937850Programmable automatic call-thru set
5344937464Modular jack with loop testing switch
5354933962Continuity test set with voice communication
5364924489Customer line tester
5374922516Telephone technician's terminals with auto-selection of dial pulse on DTMF signalling
5384922515Communication network cut-off detection arrangement
5394912755Line current test device
5404910760Network verification evaluation testing system
5414901004Apparatus and method for mapping the connectivity of communications systems with multiple communications paths
5424901003Telecommunications wiring test apparatus and method including two color display indicating correct wiring

1989

5434887289Remote testing of a trunk leading to an automatic call distributor
5444879739Wiring test device and method
5454870675Remote testing of metallic loops with a trans hybrid signal
5464864597Cable pair tester
5474862491Remote disconnection and short-circuiting apparatus and method
5484860332Apparatus for the automatic in-circuit testing of subscriber line interface circuits and method therefor
5494852145Telephone subscriber loop test system
5504852144Traffic generator analog
5514847885System for measuring and automatically compensating for the distorsions of a connection between a telephone apparatus and a central voice processing unit
5524845737Method for measuring line parameters of subscriber lines of a telecommunication system
5534843620Hand-held telephone line signaling test instrument
5544841560Direct access test unit for central office
5554841559Telephone network interface tester
5564839916Telephone toll integrity checking system
5574837811Telephone technician's terminals
5584827497Electronic trigger switch for maintenance termination unit
5594825466Telephone interface security device
5604825458Subscriber telephone equipment test apparatus
5614815119Testing transmission links
5624807277Remotely activated switching apparatus
5634799251ESS equipment testing device
5644797622Technique for determining the values of circuit elements in a three terminal equivalent circuit
5654796289Multi-line network interface

1988

5664794632Telephone trunk line testing circuitry
5674791659Remote test telephone line access system
5684788710Telephone line selection and isolation method and apparatus
5694777645Telephone line test and display circuit
5704774722Telephone line activity monitoring method and device
5714774721Cable pair to telephone number verification system
5724771451Polarity ring director
5734766594Digital network system having arrangement for testing digital subscriber line
5744764950Snap-on network interface unit
5754764949Subscriber/craftsperson ringback apparatus
5764759049Trunk identification system
5774756017Telephone test device
5784754472Telecommunication systems
5794748652Circuit for detecting abnormality in feeder
5804748651Multiline transmission line test receptacle with provision for testing each line
5814741028Method of randomizing telephone numbers
5824741017Apparatus and method for identifying and analyzing telephone channel units, commands and responses
5834741016Special service signal tester
5844729126Method and apparatus for supervising the accessing and testing of communication systems

1987

5854710949Telephone line fault locating device
5864709386Subscriber line monitoring circuit
5874707851Remote isolation test apparatus
5884707848Test set communication/interface system
5894703497Four pair cable test set
5904701699Telephone station testing apparatus
5914700380Solid state remote actuable switch
5924691337Method and apparatus for determining the value of analog voltages occurring on telephone subscriber lines of a digital telephone exchange
5934691336Telephone test set having an auxiliary amplifier and speaker for permitting listening to line signals
5944686696Transmission line signal sensing circuit employing means for conserving power, especially for use with a telephone disconnect circuit, and associated method
5954685122Interface circuit for remote control of a PABX
5964685120Electronic trigger switch for maintenance termination unit
5974685102Switching system loopback test circuit
5984682347Telephone line selection and isolation method and apparatus
5994682346Telephone test set
6004682345Adapter for coupling together two subscribers' lines to a telephone test set
6014680784Traffic simulator for testing exchanges taking the subscriber-system interaction into account
6024679224Telephone line testing circuit
6034675899Frequency ring director
6044670898Direct access test unit for central office
6054669112Automatic telephone number indicating device
6064669111Polarity ring director
6074663775Method and apparatus for testing remote communication systems
6084661969Communication lines with terminate and leave capability-VF data bridge
6094653084Remote actuated switch
6104647724Ringing interface card for telephone test equipment
6114646342Test trunk access controller
6124645874Message routing through data communication networks
6134641299Mechanized loop testing using a local metallic access port
6144639557Remote testing system for electrical circuits
6154639555Pair cut apparatus and method of use
6164636939Parallel bus protocol

1986

6174631368Switching 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
6184629836Method and apparatus for accessing communication systems
6194629835Fault isolating apparatus system and method
6204628315Addressable transducer with improved address signal processing
6214628158Stored program controller
6224626633In-line switched telephone line tester
6234626632Maintenance termination unit
6244622438Subscriber line radio concentration system with automatic response for a loop back test
6254621354DTMF receiver sense and control maintenance arrangement
6264620070Telephone line tester
6274620069Method and apparatus to determine whether a subscriber line is loaded or non-loaded
6284614844Telephone service checking terminal
6294611101Method and apparatus for testing communication systems
6304609789Verification via cable analyzer
6314605827Line fault discriminator
6324602338Impedance measurement in 4-wire to 2-wire converters
6334600810Telephone line tester
6344596904Test apparatus for telephone lines
6354594704Spare subscriber terminal device in a digital concentrator
6364590583Coin telephone measurement circuitry
6374590336Special circuit transfer via cable analyzer
6384582964Remote loop-around carrier test system
6394582960Subscriber network interface device
6404581494Telephone interface-test device
6414581493Line condition reporting system
6424580016Method and apparatus for checking the integrity of a communications channel in a voice store and forward system
6434578761Separating an equivalent circuit into components to detect terminating networks
6444575588Universal telephone test apparatus
6454570037Fault detection in a telephone cable pressure monitoring system
6464568802VF Line fault isolation and diagnostic apparatus and method
6474564728Apparatus for testing a telephone line

1985

6484562436Data communication network
6494562313Electrical systems comprising temperature-sensitive devices
6504560842Telecommunication system loop-back unit
6514558188Arrangement for line jumper testing
6524558182Remotely-activated switching apparatus
6534554642Digital filtering with monitored settling time
6544552997Arrangement for loop analysis testing for a digital switching system
6554551585Arrangement for facilitating external loop analysis testing for a digital switching system
6564550225AC Signal-activated switching apparatus
6574550223Test device, and method for locating faults in a two-lead line
6584544809Arrangement for subscriber line ring testing
6594544807Fault detector test instrument
6604543524Biased reactor maintenance termination unit
6614539652Networks for data communication
6624538033Data bridge with gating and/or testing
6634536706Magnetic current sensor
6644536617Remotely-activated switching apparatus
6654533864Test instrument with flexibly connected head
6664529847Maintenance termination unit
6674528427Test system and device for locating short circuits and open circuits in a two-lead line
6684525795Digital signal generator
6694525789Programmable network tester with data formatter
6704517513Magnetic differential current sensor
6714516070Magnetic current sensor with offset and load correction
6724513179Loop test circuit
6734496801Splicing module test set

1984

6744489221Telephone line/subscriber equipment disconnect apparatus
6754489220Test set
6764488008Telephone network interface device
6774486627Cable load status detector
6784485271Remotely actuable line disconnect device
6794480251Apparatus to monitor electrical cables, including splice joints and the like, for the ingress of moisture
6804467149Compensation method and apparatus for use with nonideal test access lines
6814467147Switching network for interactive access and testing of subscriber loops
6824464621Test device for and method of locating faults in a two-wire line or for switching two-wire lines
6834459437Test system for locating breaks and short circuits in a two-lead line
6844459436Programmable tester for measuring network characteristics
6854454388Arrangement for subscriber line verification and ring testing
6864453049Arrangement for single line testing
6874453048Arrangement for subscriber line ring testing
6884451708Spare subscriber terminal apparatus
6894447679Subscriber line testing system
6904446341Mechanized testing of subscriber facilities
6914446340Customer premises loop test unit powered from the normal central office power source
6924445007Remote testing of subscriber line interface circuits
6934440985Apparatus for determining the location of faults in a transmission line
6944440984Method of testing telephone cable pairs
6954438299On-line telephone troubleshooting apparatus
6964438298System for accessing and testing subscriber loops
6974434328Remotely actuated telephone instrument connection block having instrument lockout feature
6984430530Telephony system with automatic test call generator for remote port groups
6994424421Apparatus for testing subscriber carrier systems

1983

7004418250Telephone cable splicers test set and method of testing
7014415779Methods of and apparatus for testing telephone subscriber loop to locate a fault relative to a reference point
7024415778Subscriber telephone test set
7034413163Portable line tester for telecommunication system
7044404636Phasor impedance measuring test set
7054401861Semiconductor crosspoint linearizing arrangement
7064399440Addressable transducer with a variable frequency oscillation for monitoring a physical quantity
7074399333Telephone fault detection system
7084396809Maintenance termination unit
7094395651Low energy relay using piezoelectric bender elements
7104394543Telephone line holding circuit
7114392026Subscriber line testing system
7124388501Audio-visual line test termination device
7134386243Telephone test shoe having resilient latching means
7144385336Current supplying circuit with shorted-to-ground fault detecting function
7154385230Digital temperature effect generator
7164373121Maintenance termination device
7174373120Line test termination device
7184369341Customer line test termination device
7194368363Audible line test termination device

1982

7204366350Control system for telephone switching system
7214356356Headset/groundcord tester apparatus
7224356348Techniques for detecting a condition of response on a telephone line
7234355209Programmable line circuit
7244350849Varying impedance line test termination device
7254334129Telephone digital office cutover system
7264331913Precision negative impedance circuit with calibration
7274323738Portable telephone line test set
7284320338Methods of and apparatus for determining the capacitance of a transmission line by integrating line currents
7294317967Fault isolation device
7304314110System for the testing of telephone switching systems
7314311882Method of and arrangement for testing traffic routes in telecommunication networks
7324309578Telephone ringer load simulator

1981

7334301334Telecommunication subscriber line access circuit with ground key and insulation fault indication
7344292480Method and apparatus for locating telephones
7354291299Analog to digital converter using timed level changes
7364278931Location of contact faults on electrically conductive cables
7374276451Control system for telephone switching system
7384270030Testing of subscriber loop pair gain systems
7394267646Telephone question and answer training device
7404260859Method and apparatus for detecting transmission system failures in a communications network
7414258236Remote telephone line switching and testing
7424255625Call processing monitor system
7434255624Call processing monitor system
7444247742Trunk test circuit

1980

7454238649Call simulator
7464229691Electrical testing of cords terminated with modular plugs
7474218592Telephone analyzer for detection of clandestine devices
7484213013Telephone network/subscriber interface device
7494209671Method and apparatus for testing the tip-ring polarity of telephone receptacles connected in parallel to a non-working pair
7504197435Telephone line monitoring circuit and method
7514194098Lineman's hand test set
7524186282Method and apparatus for measuring telephone line characteristics
7534185174Method and apparatus for checking connection paths in a telephone exchange

1979

7544173736Capacitance detecting system and method for testing wire connections
7554169220Telephone instrument connection block with remotely actuated line test
7564167656Junctor checking system
7574164632Signalling system for overvoltage protectors
7584147902Method of automatic trunk testing
7594147901Relay margin test set
7604143250Telephone isolation system
7614139745Telephone line test system
7624138599Modular communication system having self-identifying modules

1978

7634126771Telephone line lifting apparatus
7644117264Diode package for use with a central office connector module
7654113998Testing electrically conductive lines to determine electrical characteristics thereof
7664105995Digitally controlled transmission impairment measuring apparatus
7674103225System and method for determining capacitance and cable length in the presence of other circuit elements
7684095058Telephone switching system test set
7694086448Loop-around test circuit for telecommunications lines
7704085298Measurement of current through a line subject to spurious high potentials
7714079210Ringing and testing control circuitry for communication systems
7724076971Subscriber line testing system
7734066843Telephone circuit monitoring system

1977

7744056698Special automatic trunk testing arrangement
7754056687Decoupling control arrangement for auxiliary circuits coupled to telephone lines
7764054760Remote testing of telephone loops
7774054759Subscriber loop verification device and method
7784051333Tip and ring conductor voltage tester
7794045624Continuous monitoring in carrier telephone systems
7804045623Short circuit indicator for a terminator matrix
7814041255Switching circuit for telecommunications lines
7824034162Telephone receiver-off-hook detector
7834034161Telephone receiver-off-hook detector
7844029913Remote accessing system for telephone lines
7854028507Apparatus for applying particular voltages to three-terminal circuits and measuring resulting current flows for the purpose of determining circuit characteristics
7864022989Telephone receiver-off-hook-and-in-use detector
7874021624Automatic call generator
7884001559Programmable measuring

1976

7893983338Apparatus 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
7903976849Telephone wiring tester
7913973090Telephone number assignment record verification apparatus and method
7923969594Automated telephony testing and polling apparatus and system
7933965418Telephone system testing apparatus and techniques utilizing central measuring equipment with a plurality of remote test stations
7943959605Circuit for detecting loss of telephone line voltage
7953952172Telephone call simulator
7963943305Telephone line control system
7973941950Telephone line testing instrument having a supervising capability
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017