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Class Information
Number: 370/495
Name: Multiplex communications > Communication techniques for information carried in plural channels > Combining or distributing information via frequency channels > Combined voice and data transmission > Data under voice
Description: Subject matter wherein data are transmitted on a carrier frequency lower than the voice frequency range.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602769 |
Audio packet switching system |
Oct. 13, 2009 |
| 7558193 |
Redundancy in voice and data communications systems |
Jul. 7, 2009 |
| 7529270 |
Communication information bandwidth control apparatus and method |
May. 5, 2009 |
| 7492873 |
Voice/data session switching in a converged application delivery environment |
Feb. 17, 2009 |
| 7489674 |
Method for wireless local area network communication using multiple channels |
Feb. 10, 2009 |
| 7400617 |
Integrated voice-over-internet protocol processor |
Jul. 15, 2008 |
| 7231271 |
Steganographic method for covert audio communications |
Jun. 12, 2007 |
| 7136395 |
Method and system for transmission of headerless data packets over a wireless link |
Nov. 14, 2006 |
| 7133899 |
Method and apparatus for providing interactive text messages during a voice call |
Nov. 7, 2006 |
| 7039399 |
Distribution of wireless telephony and data signals in a substantially closed environment |
May. 2, 2006 |
| 7016475 |
Extendable call agents simulator |
Mar. 21, 2006 |
| 6975718 |
Automated route plan generation |
Dec. 13, 2005 |
| 6937616 |
Method and apparatus for providing packet based and distributed xDSL communications |
Aug. 30, 2005 |
| 6928150 |
Call charging notification |
Aug. 9, 2005 |
| 6925093 |
Communication apparatus, communication system and method for integrating speech and data |
Aug. 2, 2005 |
| 6782005 |
Communication system and communication method |
Aug. 24, 2004 |
| 6747992 |
Communication system and communication method |
Jun. 8, 2004 |
| 6707827 |
Method and apparatus for optimizing audio response in telephony-over-LAN systems |
Mar. 16, 2004 |
| 6704406 |
Automated route plan generation |
Mar. 9, 2004 |
| 6526058 |
VODSL service provision |
Feb. 25, 2003 |
| 6424661 |
ADSL with RF POTS overlay |
Jul. 23, 2002 |
| 6324212 |
Apparatus using low spectrum selectively for providing both ADSL and POTS service |
Nov. 27, 2001 |
| 6320879 |
Communication system and method for interleaving or transmission of telephone rings and data |
Nov. 20, 2001 |
| 6285754 |
Odd-order low-pass pots device microfilter |
Sep. 4, 2001 |
| 6256302 |
Method for the common transmission of digital and analogue modulated radio broadcasting and/or television broadcasting signals |
Jul. 3, 2001 |
| 6226529 |
System for providing a simultaneous data and voice channel within a single channel of a portable cellular telephone to provide position-enhanced cellular services (PECS) |
May. 1, 2001 |
| 6154484 |
Method and apparatus for embedding auxiliary data in a primary data signal using frequency and time domain processing |
Nov. 28, 2000 |
| 6061392 |
Apparatus and method for communicating voice and data between a customer premises and a central office |
May. 9, 2000 |
| 6055435 |
Wireless telephone connection surge suppressor |
Apr. 25, 2000 |
| 5995568 |
Method and apparatus for performing frame synchronization in an asymmetrical digital subscriber line (ADSL) system |
Nov. 30, 1999 |
| 5991309 |
Bandwidth management system for a remote repeater network |
Nov. 23, 1999 |
| 5937000 |
Method and apparatus for embedding auxiliary data in a primary data signal |
Aug. 10, 1999 |
| 5822360 |
Method and apparatus for transporting auxiliary data in audio signals |
Oct. 13, 1998 |
| 5764628 |
Dual port interface for communication between a voice-over-data system and a conventional voice system |
Jun. 9, 1998 |
| 5619508 |
Dual port interface for a computer-based multifunction personal communication system |
Apr. 8, 1997 |
| 5617423 |
Voice over data modem with selectable voice compression |
Apr. 1, 1997 |
| 5559793 |
Echo cancellation system and method |
Sep. 24, 1996 |
| 5535204 |
Ringdown and ringback signalling for a computer-based multifunction personal communications system |
Jul. 9, 1996 |
| 5453986 |
Dual port interface for a computer-based multifunction personal communication system |
Sep. 26, 1995 |
| 5136586 |
Method and apparatus for telephone line multiplex channeling of toll-quality voice and digital information |
Aug. 4, 1992 |
| 5036513 |
Method of and apparatus for integrated voice (audio) communication simultaneously with "under voice" user-transparent digital data between telephone instruments |
Jul. 30, 1991 |
| 4425661 |
Data under voice communications system |
Jan. 10, 1984 |
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