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Class Information
Number: 379/350
Name: Telephonic communications > Supervisory or control line signaling
Description: Subject matter for transmitting either a selective control signal, or a status indicating signal, over a telephone line.

Sub-classes under this class:

Class Number Class Name Patents
379/386 Signal receiver (e.g., tone decoder) 380
379/372 Signal reception at substation 185
379/351 Signalling integrity protection (e.g., voice signal immunity) 112
379/352 Substation originated 87
379/377 Using line or loop condition detection (e.g., line circuit) 398

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8526598 Services and transactions in a telephony network Sep. 3, 2013
8488591 Method and system for video telephone communications set up, related equipment and computer program product Jul. 16, 2013
8472600 System and method for providing signaling in a network environment Jun. 25, 2013
8433055 Services and transactions in a telephony network Apr. 30, 2013
8416931 System and method for the management of credit-debit operations in accounts related to telecommunications services Apr. 9, 2013
8275119 Services and transactions in a telephony network Sep. 25, 2012
8135127 Method and apparatus for detecting and responding to events occurring on remote telephone Mar. 13, 2012
7974402 TDMA mobile ad-hoc network (MANET) with second order timing and tracking Jul. 5, 2011
7817993 System and method for copying ring back tone transfer sound Oct. 19, 2010
7783031 Method for translating a dialed string entered by a calling party Aug. 24, 2010
7680060 Transferring state information in a network Mar. 16, 2010
7516219 Consumer configurable mobile communication web filtering solution Apr. 7, 2009
7377952 System and method for removing contaminates from the air in a mail-sorting room May. 27, 2008
7200220 Portable telephone maintenance service system and maintenance service method Apr. 3, 2007
7142663 Global directory service with intelligent dialing Nov. 28, 2006
7106842 Method of detecting cut-off calls in a switching system Sep. 12, 2006
7046755 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable time constants May. 16, 2006
6975721 Global directory service with intelligent dialing Dec. 13, 2005
6968049 Transmission of charging signals on a data transmission path Nov. 22, 2005
6956942 Multi-modal address book Oct. 18, 2005
6813353 Redundant operation of ring voltage generators utilizing voltage bus segmentation for fault isolation Nov. 2, 2004
6810120 Method of determining answer supervision at a line appearance of a public switch telephone network Oct. 26, 2004
6766016 Supervisory control system Jul. 20, 2004
6549546 Call cut-off detection circuit for switch and method of the same Apr. 15, 2003
6498847 Dialer programming and device with integrated printing process Dec. 24, 2002
6411693 Long distance modem warning Jun. 25, 2002
6343300 File updating method capable of updating an operation file without interrupting online processing Jan. 29, 2002
6272212 Telephone intercept apparatus and method for intercepting an outgoing telephone number Aug. 7, 2001
6256379 Method and system for conveying supervision information Jul. 3, 2001
6192123 Method and apparatus for initiating telephone calls using a data network Feb. 20, 2001
6185294 Method and apparatus for installing telephone intercom-voice messaging apparatus at doorbell for dwelling Feb. 6, 2001
6154724 Energy based pulse position detector for telephone wire networks Nov. 28, 2000
6114970 Method of assigning a device identification Sep. 5, 2000
6088437 Call processing system, method and computer program product Jul. 11, 2000
6072869 Adaptive method and apparatus for detecting a stutter dial tone signal Jun. 6, 2000
6052459 Method and arrangement for signalling systems Apr. 18, 2000
6028927 Method and device for detecting the presence of a periodic signal of known period Feb. 22, 2000
5987121 Allowing stand-alone and local control of a single LED Nov. 16, 1999
5982875 Process and apparatus for interaction between a telephone and its user Nov. 9, 1999
5982874 Transmission system with improved tone detection Nov. 9, 1999
5970415 Method for handling collision of calls Oct. 19, 1999
5959372 Power management circuit Sep. 28, 1999
5943418 Ring-trip circuit Aug. 24, 1999
5937039 Method for sending out absent messages from ISDN exchange system Aug. 10, 1999
5933487 Method and apparatus for searching a plurality of destination numbers Aug. 3, 1999
5930349 Command signals generator circuit for telephonic fees indicators Jul. 27, 1999
5926523 Apparatus and method of recognizing establishment of speech channels in communication appliances connected in parallel to a common telephone line Jul. 20, 1999
5859896 Telephone line automatic prefix dialer Jan. 12, 1999
5859905 Cycle-modulating type of dual-tone multifrequency generator Jan. 12, 1999
5850436 Communication between a telephone and a computer system Dec. 15, 1998

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