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Class Information
Number: 379/399.01
Name: Telephonic communications > Subscriber line or transmission line interface
Description: Subject matter including a link for connecting at least one telephone communications line to a central switching office or subscriber station.










Sub-classes under this class:

Class Number Class Name Patents
379/399.02 Circuitry to provide a coder and decoder function 180
379/400 For line length compensation 126
379/402 Hybrid circuit 242
379/413.02 Network interface device (nld) 207
379/413 Power supply (e.g., battery feed) 661
379/412 Protective circuit 414


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13

Patent Number Title Of Patent Date Issued
8693676 Power efficiency of a line driver Apr. 8, 2014
8644493 Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same Feb. 4, 2014
8634498 Systems and methods for probing wired communication channels Jan. 21, 2014
8553848 Preserving voltage on telephone line over hard reset during planned outage Oct. 8, 2013
8543406 Method and system for communicating with an interactive voice response (IVR) system Sep. 24, 2013
8537814 Configurable network interface device and systems and methods for its use Sep. 17, 2013
8526453 Linecard and method for telecommunication Sep. 3, 2013
8514951 Method and system for interference cancellation Aug. 20, 2013
8509421 Method and device for checking a subscriber line Aug. 13, 2013
8494120 Detecting foreign voltage faults in telephone customer premise equipment Jul. 23, 2013
8472615 Method, system, and device for power adjustment of vectored digital subscriber line (vectored-DSL) Jun. 25, 2013
8472618 Network switching device Jun. 25, 2013
8457181 Rate agile rate-adaptive digital subscriber line Jun. 4, 2013
8457182 Multiple data rate communication system Jun. 4, 2013
8452001 Class A-B line driver for gigabit Ethernet May. 28, 2013
8422662 Splitter wall plates for digital subscriber line (DSL) communication systems and methods to use the same Apr. 16, 2013
8406413 Method and apparatus for universal xDSL demarcation interface with multi-functional capability and signal performance enhancement Mar. 26, 2013
8406414 Method and apparatus for dynamically scheduling ringing signals Mar. 26, 2013
RE44094 Impedance blocking filter circuit Mar. 19, 2013
8369492 Directory dialer name recognition Feb. 5, 2013
8351583 Telecommunication system and method of synchronization Jan. 8, 2013
8325908 Method and apparatus for detecting ring trip precursors Dec. 4, 2012
RE43706 Fallback function telecommunications device Oct. 2, 2012
8249134 High impedance state for digital subscriber line transceivers on copper pairs Aug. 21, 2012
8238545 Method and arrangement for power minimization in a multi-tone transmission-based communication system Aug. 7, 2012
8223958 Determining an active line Jul. 17, 2012
8213590 Call prioritization in a communication network Jul. 3, 2012
8204212 Phone and method for reducing noise in a subscriber line interface circuit thereof Jun. 19, 2012
8165283 Advanced ADSL splitter Apr. 24, 2012
8155285 Switchboard for dual-rate single-band communication system Apr. 10, 2012
8144852 Method and apparatus for spectral containment over telephone service lines Mar. 27, 2012
8107618 Method and system for providing DC power on local telephone lines Jan. 31, 2012
8094807 Information processing system, information processing apparatus, methods, program and recording medium Jan. 10, 2012
8027279 Echo cancellation Sep. 27, 2011
8027461 Systems and methods for splitting telecommunication signals with reduced noise Sep. 27, 2011
RE42714 Apparatus for voice communications over wired and wireless networks Sep. 20, 2011
8014518 Patch panel apparatus and system including patch cord path tracing Sep. 6, 2011
8009824 Line driver with active termination Aug. 30, 2011
8005069 Methods and apparatus to self-configure a flexible residential gateway Aug. 23, 2011
RE42590 Telephone line coupler Aug. 2, 2011
7964993 Network devices with solid state transformer and class AB output stage for active EMI suppression and termination of open-drain transmit drivers of a physical device Jun. 21, 2011
7961846 Interface device for testing a telecommunication circuit Jun. 14, 2011
7953220 Network switching device May. 31, 2011
7949125 Method and apparatus for transmitting signaling tones over a packet switched network May. 24, 2011
7925005 Longitudinal balance calibration for a subscriber line interface circuit Apr. 12, 2011
7920696 Method and device for changing to a speakerphone mode Apr. 5, 2011
RE42237 Active mode line voltage regulator for ringing subscriber line interface circuit Mar. 22, 2011
7912210 Inductive coupling for communications equipment interface circuitry Mar. 22, 2011
7904578 Bandwidth and topology management device for home networks Mar. 8, 2011
7892046 Telecommunications module, combination of a telecommunications module and at least one splitter circuit, and assembly of at least two telecommunications modules Feb. 22, 2011

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