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Class Information
Number: 370/525
Name: Multiplex communications > Communication techniques for information carried in plural channels > Combining or distributing information via time channels > Signaling (ancillary to main information) > Digital tone signal generation
Description: Subject matter including a generator which creates an encoded binary signal representation of a tone or a wave signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7539182 |
Signalling in a telecommunications network |
May. 26, 2009 |
| 7536194 |
Method and system for providing an energy efficient exchange of information in wireless networks |
May. 19, 2009 |
| 7522515 |
Method and system for providing window shaping for multiline transmission in a communications system |
Apr. 21, 2009 |
| 7515640 |
Systems and methods for communicating in a discrete multitone system |
Apr. 7, 2009 |
| 7480751 |
Serial data interface system and method using a selectively accessed tone pattern generator |
Jan. 20, 2009 |
| 7411984 |
Method of providing tone information to nodes in a packet network |
Aug. 12, 2008 |
| 7400676 |
Tone quality adjustment device designing method and designing device, tone quality adjustment device designing program, and tone quality adjustment device |
Jul. 15, 2008 |
| 7149253 |
Wireless communication |
Dec. 12, 2006 |
| 7092383 |
Method for switching on a subscriber signal, associated switching office and associated program |
Aug. 15, 2006 |
| 7092440 |
Hybrid spread-spectrum technique for expanding channel capacity |
Aug. 15, 2006 |
| 6957018 |
Optical packet exchange system and optical switch |
Oct. 18, 2005 |
| 6937673 |
Method of compensating frequency error in communication system and apparatus for the same |
Aug. 30, 2005 |
| 6907027 |
Radio communication system |
Jun. 14, 2005 |
| 6895011 |
Method and apparatus for re-sequencing data packets |
May. 17, 2005 |
| 6807234 |
Method and apparatus for constellation mapping and bitloading in multi-carrier transceivers, such as DMT-based DSL transceivers |
Oct. 19, 2004 |
| 6771641 |
DTMF digit collection and transportation for a packet network |
Aug. 3, 2004 |
| 6763003 |
Optimized tone sending in an ATM satellite network |
Jul. 13, 2004 |
| 6449286 |
R2 multi-frequency compelled signalling using a DSP on a network termination card |
Sep. 10, 2002 |
| 6442218 |
Demodulator |
Aug. 27, 2002 |
| 6404783 |
Method and apparatus for mobile data communication |
Jun. 11, 2002 |
| 6385202 |
Method and system for allowing access to traditional voice mail and interactive voice response systems over internet-like networks |
May. 7, 2002 |
| 6243399 |
Ring signal generator |
Jun. 5, 2001 |
| 6219350 |
ATM cell converting apparatus which includes tone and DTMF generating function and method using the same |
Apr. 17, 2001 |
| 6208669 |
Method and apparatus for mobile data communication |
Mar. 27, 2001 |
| 6160792 |
Pulse amplitude modulated tone generator |
Dec. 12, 2000 |
| 6072769 |
Method for multitone division multiple access communications |
Jun. 6, 2000 |
| 6055245 |
Apparatus and method for digitally conveying alert tones between an analog modem and an ISDN terminal adapter |
Apr. 25, 2000 |
| 6035000 |
Mitigating radio frequency interference in multi-carrier transmission systems |
Mar. 7, 2000 |
| 6009084 |
Concentrating transmultiplexer for cable telephony |
Dec. 28, 1999 |
| 6005876 |
Method and apparatus for mobile data communication |
Dec. 21, 1999 |
| 5978388 |
Tone generator |
Nov. 2, 1999 |
| 5968148 |
High quality audio generation by storing wave tables in system memory and having a DMA controller on the sound board for transferring the wave tables |
Oct. 19, 1999 |
| 5943319 |
Packet format interface for telecommunication instruments |
Aug. 24, 1999 |
| 5838799 |
Digital sound broadcasting using a dedicated control channel |
Nov. 17, 1998 |
| 5835574 |
Dual-tone multi-frequency signal transfer protocol |
Nov. 10, 1998 |
| 5825781 |
Pulse amplitude modulated tone generator |
Oct. 20, 1998 |
| 5687177 |
Tone blocking using variable delay buffer |
Nov. 11, 1997 |
| 5675634 |
Announcement apparatus for switching system |
Oct. 7, 1997 |
| 5668802 |
High-speed digital subscriber lines |
Sep. 16, 1997 |
| 5666357 |
DTMF tone passer in a voice communication system |
Sep. 9, 1997 |
| 5436964 |
Programmable call progress tones for a switching system |
Jul. 25, 1995 |
| 5408466 |
Duplex interconnect dispatch trunked radio |
Apr. 18, 1995 |
| 5384807 |
ADPCM transcoder with integral tone generation and method therefor |
Jan. 24, 1995 |
| 5359598 |
Voice server for digital communication network |
Oct. 25, 1994 |
| RE34676 |
Fiber optic digital data transmitting system |
Jul. 26, 1994 |
| 5295178 |
Digital signal processor for radio base station |
Mar. 15, 1994 |
| 5291479 |
Modular user programmable telecommunications system with distributed processing |
Mar. 1, 1994 |
| 5253270 |
Apparatus useful in radio communication of digital data using minimal bandwidth |
Oct. 12, 1993 |
| 5204862 |
TDM slot muting method and apparatus |
Apr. 20, 1993 |
| 5138609 |
Automatic channel switching from fallback channels to regular channels |
Aug. 11, 1992 |
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