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Class Information
Number: 379/27.02
Name: Telephonic communications > Diagnostic testing, malfunction indication, or electrical condition measurement > Testing of subscriber loop or terminal > By generating call signal
Description: Subject matter which includes placing an actual telephone call into the system to be tested.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8693639 Internet phone trainer Apr. 8, 2014
8644169 Methods and apparatus to perform line testing at customer premises Feb. 4, 2014
8369486 Systems and methods for testing telephony equipment Feb. 5, 2013
8320527 Crossover faults detection in two-wires network Nov. 27, 2012
8300536 System and method for providing real time indicator of voice transmission quality Oct. 30, 2012
8275095 System and method for providing telephone assignment information to telephone service technicians Sep. 25, 2012
8265231 Method for identifying a device transmitting an echo signal, echo source identifying method for identifying echo source, measuring apparatus for identifying a source of an echo, and echo sourc Sep. 11, 2012
8265259 Functionalities for local number portability in a telecommunications network Sep. 11, 2012
8199905 Systems and methods for identifying subscriber lines Jun. 12, 2012
7940684 Voice over internet protocol (VoIP) testing May. 10, 2011
7881452 Method for testing a local number portability (LNP) ported telephone number Feb. 1, 2011
7573825 Methods, apparatus and computer program products for testing a voice over Internet protocol communication system Aug. 11, 2009
7483369 Method and apparatus for migrating to an alternate call controller Jan. 27, 2009
7471772 Arrangement for line-testing Dec. 30, 2008
7412035 External detection of optional telephone services on a telephone line Aug. 12, 2008
7227928 Arrangement for line-testing Jun. 5, 2007
7209553 Cutover method and device for telephone lines Apr. 24, 2007
7158615 External detection of optional telephone services on an unknown telephone line Jan. 2, 2007
7151819 End-to-end network testing Dec. 19, 2006
7016475 Extendable call agents simulator Mar. 21, 2006
7010096 Remote testing of a communications line Mar. 7, 2006
6950498 External detection of optional telephone services Sep. 27, 2005
6914962 Call-flow verification method and apparatus Jul. 5, 2005
6876726 Determining the composition of physical structures from boundary measurements, including the composition of subscriber loops Apr. 5, 2005
6853708 End-to-end network testing Feb. 8, 2005
6826259 Method for emulating a terminal and test apparatus for testing a telecommunication network Nov. 30, 2004
6819744 System and circuitry for measuring echoes on subscriber loops Nov. 16, 2004
6751295 Method and apparatus for measuring communication market statistics Jun. 15, 2004
6741676 Determining the physical structure of subscriber lines May. 25, 2004
6738455 Apparatus and method for testing subscriber lines and equipment May. 18, 2004
6707886 Method and system for testing subscriber loops using touchtone telephone signals Mar. 16, 2004
6693992 Line probe signal and method of use Feb. 17, 2004
6614879 Method and apparatus for intra-bundle signaling Sep. 2, 2003
6594344 Auto latency test tool Jul. 15, 2003
6574335 Method for simulating a ring back for a call between parties in different communication networks Jun. 3, 2003
6516054 Method for adjusting current levels, which have been falsified by offset-current levels, in a subscriber line circuit Feb. 4, 2003
6298118 System and method for processing of communication line test signals, such as enhancement processing Oct. 2, 2001
6292540 Battery injection and loop supervision for DSL environment Sep. 18, 2001
6263047 Apparatus and method for characterizing the loading pattern of a telecommunications transmission line Jul. 17, 2001
6205202 Subscriber line tester Mar. 20, 2001
6157704 Subscriber line test system for access network Dec. 5, 2000
6049592 System for and method of mutually monitoring information guidance units interconnected to telephone lines Apr. 11, 2000
6014425 Apparatus and method for qualifying telephones and other attached equipment for optimum DSL operation Jan. 11, 2000
5982851 Call yourself BERT testing of ISDN line Nov. 9, 1999
5966428 Self diagnostic system for cellular-transceiver systems with remote-reporting capabilities Oct. 12, 1999
5956386 Telephone subscriber line diagnostics system and method Sep. 21, 1999
5910976 Method and apparatus for testing customer premises equipment alert signal detectors to determine talkoff and talkdown error rates Jun. 8, 1999
5901202 Method for initiating a telephone call on a remote line May. 4, 1999
5889836 Apparatus to prevent unauthorized use of telephone lines Mar. 30, 1999
5862200 Ground fault detector for T1 span equipment Jan. 19, 1999

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