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Class Information
Number: 379/27.03
Name: Telephonic communications > Diagnostic testing, malfunction indication, or electrical condition measurement > Testing of subscriber loop or terminal > By analysis of testing signal
Description: Subject matter which includes placing a signal into the system to be tested and comparing the parameters of the output signal from the system over a continuous range with the corresponding parameters of the signal input.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8712018 Testing apparatus and testing method for telephone apparatus Apr. 29, 2014
8687680 Systems and methods for loop length and bridged tap length determination of a transmission line Apr. 1, 2014
8687770 Systems and methods for performing line imbalance measurement and mitigation based on a common mode sensor Apr. 1, 2014
8675497 Communication quality evaluation system, device, method, and program thereof Mar. 18, 2014
8649285 Tracking packet sequence numbers Feb. 11, 2014
8644169 Methods and apparatus to perform line testing at customer premises Feb. 4, 2014
8553750 Systems and methods for loop length and bridged tap length determination of a transmission line Oct. 8, 2013
8515017 Systems and methods for loop termination detection based on per-port calibration Aug. 20, 2013
8515016 Systems and methods for bridge tap detection based on per-port calibration Aug. 20, 2013
8509389 Systems and methods for loop length estimation based on per-port calibration Aug. 13, 2013
8472615 Method, system, and device for power adjustment of vectored digital subscriber line (vectored-DSL) Jun. 25, 2013
8467523 Method and device for cancelling interference between a signal carried by a carrier power line and a signal carried by a telephone line Jun. 18, 2013
8457181 Rate agile rate-adaptive digital subscriber line Jun. 4, 2013
8385510 Method for transmission line analysis Feb. 26, 2013
8369513 Methods and systems for compensation for alien crosstalk between connectors Feb. 5, 2013
8369394 Systems and methods for loop length and bridged tap length determination of a transmission line Feb. 5, 2013
8300536 System and method for providing real time indicator of voice transmission quality Oct. 30, 2012
8300771 Systems and methods for characterizing loop termination via single-ended line testing Oct. 30, 2012
8295444 Systems and methods for performing loop analysis based on un-calibrated single-ended line testing Oct. 23, 2012
8259908 Method and apparatus for metallic line testing of a subscriber line Sep. 4, 2012
8238450 Dynamic transmitter noise level adjustment for digital subscriber line systems Aug. 7, 2012
8194565 Service level agreements based on objective voice quality testing for voice over IP (VOIP) networks Jun. 5, 2012
8112043 Radio frequency communication devices and methods Feb. 7, 2012
8094703 Systems and methods for loop length and bridged tap length determination of a transmission line Jan. 10, 2012
8005132 Non-intrusive modem performance analysis Aug. 23, 2011
7991122 DSL system training Aug. 2, 2011
7978613 Test signalling Jul. 12, 2011
7881189 Method for providing predictive maintenance using VoIP post dial delay information Feb. 1, 2011
7852910 Systems and methods for loop length and bridged tap length determination of a transmission line Dec. 14, 2010
7835431 Systems and methods for loop length and bridged tap length determination of a transmission line Nov. 16, 2010
7831025 Method and system for administering subjective listening test to remote users Nov. 9, 2010
7773587 Voice over internet protocol network test device and method Aug. 10, 2010
7742577 Tone around test adapter Jun. 22, 2010
7720202 Method and apparatus for testing telephone sound quality May. 18, 2010
7706287 Communication system multiplexer included in the system, line performance test method and recording medium having program recorded thereon Apr. 27, 2010
7693266 Method and system for measuring acoustic quality of wireless customer premises equipment Apr. 6, 2010
7664232 Method and system for distance measurements Feb. 16, 2010
7602732 End-to-end connection packet loss detection algorithm using power level deviation Oct. 13, 2009
7573825 Methods, apparatus and computer program products for testing a voice over Internet protocol communication system Aug. 11, 2009
7561670 End-to-end network testing Jul. 14, 2009
7555306 Method and system for mobile device performance monitoring Jun. 30, 2009
7554926 Remote test unit Jun. 30, 2009
7388946 System and method for evaluating the quality of service in an IP telephony network using call forwarding Jun. 17, 2008
7305067 Tone distribution apparatuses, systems, and methods Dec. 4, 2007
7302046 Method for the detection of impedances and for the qualification of the telephone lines Nov. 27, 2007
7236573 Method and apparatus for testing telephone sound quality Jun. 26, 2007
7151819 End-to-end network testing Dec. 19, 2006
7111049 System and method for providing internet based phone conferences using multiple codecs Sep. 19, 2006
7103147 Methods and apparatuses for determining loop characteristics using standard voice-band modem Sep. 5, 2006
7072449 System and method for establishing a power level for a communication signal transmitted in a conductor Jul. 4, 2006

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