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Class Information
Number: 379/93.28
Name: Telephonic communications > Telephone line or system combined with diverse electrical system or signalling (e.g., composite) > Having transmission of a digital message signal over a telephone line > By voice frequency signal (e.g., tone code) > Modulated audio tone
Description: Subject matter wherein a pulse or data signal causes a variation in the frequency, phase, or amplitude of an audible tone.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7519168 |
Host computer digital signal processing system for communicating over voice-grade telephone channels |
Apr. 14, 2009 |
| 7512220 |
DSL modem and a method of providing operating power for same |
Mar. 31, 2009 |
| 7471777 |
Indirect DSL over loaded and unloaded loops |
Dec. 30, 2008 |
| 7295663 |
Network communication system |
Nov. 13, 2007 |
| 7272215 |
Automatic rapid switching between DSL service and POTS over loaded loops |
Sep. 18, 2007 |
| 7227934 |
Method and apparatus for processing multiple signals transceived through a coupling |
Jun. 5, 2007 |
| 7227933 |
System and method for remote management of a DSL device |
Jun. 5, 2007 |
| 7177408 |
Devices, softwares and methods for selectively limiting the duration of an individual Modem-On-Hold session |
Feb. 13, 2007 |
| 7142649 |
Dedicated data modem system and method |
Nov. 28, 2006 |
| 7130395 |
Method and system for reducing cross-talk and avoiding bridged taps |
Oct. 31, 2006 |
| 7127049 |
System and method for enhancing the activation of DSL service |
Oct. 24, 2006 |
| 7106839 |
System for providing analog and digital telephone functions using a single telephone line |
Sep. 12, 2006 |
| 7103159 |
Off-hook notifier |
Sep. 5, 2006 |
| 7095831 |
Devices, softwares and methods for selectively limiting the total modem-on-hold timeout time of a single log-in session |
Aug. 22, 2006 |
| 7046773 |
System and method for preventing telephone line blocking by a modem |
May. 16, 2006 |
| 7020272 |
High density signal classifier for media gateways |
Mar. 28, 2006 |
| 6985565 |
Configurable DSL modem for high bit rates |
Jan. 10, 2006 |
| 6934368 |
Multi-band modem |
Aug. 23, 2005 |
| 6901138 |
Digital communication system using telephone line and initializing method thereof |
May. 31, 2005 |
| 6895042 |
Apparatus and method for pre-provisioning of broadband access to subscribers in a telecommunication system |
May. 17, 2005 |
| 6895085 |
System and method for preventing telephone line blocking by a modem |
May. 17, 2005 |
| 6868502 |
Combination analog and digital modem |
Mar. 15, 2005 |
| 6826225 |
Integrated modem and line-isolation circuitry with selective raw data or modem data communication and associated method |
Nov. 30, 2004 |
| 6801602 |
Method of initiating a call feature request |
Oct. 5, 2004 |
| 6781989 |
Method to support VLANs on a phoneline network |
Aug. 24, 2004 |
| 6782082 |
Method and system for reducing cross-talk and avoiding bridged taps |
Aug. 24, 2004 |
| 6775357 |
Method and system for providing enhanced call waiting with verification and name change service |
Aug. 10, 2004 |
| 6763097 |
Source adaptive digital subscriber line and method |
Jul. 13, 2004 |
| 6754318 |
Configurable multi-port modem to achieve a high bit rate in a DSL system |
Jun. 22, 2004 |
| 6711245 |
Method and apparatus for processing call progress of a serial communication device |
Mar. 23, 2004 |
| 6693997 |
Host computer digital signal processing system for communicating over voice-grade telephone channels |
Feb. 17, 2004 |
| 6690718 |
Asymmetric digital subscriber line transceiver unit-card and method of controlling the same |
Feb. 10, 2004 |
| 6687371 |
Maintaining an off-hook condition during a call bridge |
Feb. 3, 2004 |
| 6674846 |
Method and system for modem pulse dialing in a telecommunication system |
Jan. 6, 2004 |
| 6665350 |
Method and system for improved analog signal detection |
Dec. 16, 2003 |
| 6658097 |
Codec circuit and method for increasing the data transmission rate during a modem transmission |
Dec. 2, 2003 |
| 6650741 |
Devices, softwares and methods for selectively limiting the duration of an individual modem-on-hold session |
Nov. 18, 2003 |
| 6647100 |
Universal Serial Bus datapump command interpreter |
Nov. 11, 2003 |
| 6633582 |
Symmetrical codec selection in an asymmetrical codec environment |
Oct. 14, 2003 |
| 6625263 |
Method, device for detecting the calling of a telephone and modem including such a device |
Sep. 23, 2003 |
| 6594467 |
Unidirectional communication scheme for remote maintenance and control in a broadband wireless access system |
Jul. 15, 2003 |
| 6587560 |
Low voltage circuits powered by the phone line |
Jul. 1, 2003 |
| 6584122 |
Method and system for providing voice and data service |
Jun. 24, 2003 |
| 6577715 |
Modem apparatus, communication control apparatus, communication terminal apparatus, and communication control method |
Jun. 10, 2003 |
| 6574315 |
Method for controlling data transmission in a wireless V.24 data transmission system operating between a data terminal and a data transmission device for data telecommunication |
Jun. 3, 2003 |
| 6546091 |
Automatic detection of phone system settings for dial-up modem connections |
Apr. 8, 2003 |
| 6539081 |
Method of establishing signaling rate for single-line digital subscriber link providing extended range ADSL service with auxiliary pots channel |
Mar. 25, 2003 |
| 6532279 |
High-speed data communication over a residential telephone wiring network |
Mar. 11, 2003 |
| 6526046 |
System and method for communicating telecommunication information using asynchronous transfer mode |
Feb. 25, 2003 |
| 6522731 |
Data communication apparatus |
Feb. 18, 2003 |
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