with voice-band signalling frequencies

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CPC
H04Q1/444

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HELECTRICITY H04Electric communication H04QSELECTING H04Q1/00Details of selecting apparatus or arrangements for establishing connections among stations for the purpose of transferring information via these connections

Current Industry

H04Q1/444with voice-band signalling frequencies

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Using RTCP statistics for media system control
- Patent number 8,018,853
- Issue date Sep 13, 2011
- Broadcom Corporation
- Wilfrid LeBlanc
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Using RTCP statistics for media system control
- Patent number 7,525,918
- Issue date Apr 28, 2009
- Broadcom Corporation
- Wilfrid LeBlanc
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for testing an asymmetric digital subscriber line
- Patent number 7,058,162
- Issue date Jun 6, 2006
- France Telecom
- Christian Gadin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polite call waiting notification
- Patent number 7,046,784
- Issue date May 16, 2006
- Avaya Technology Corp.
- Doree Duncan Seligmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal detector
- Patent number 6,931,076
- Issue date Aug 16, 2005
- Intel Corporation
- Sigang Qiu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for testing large-scale audio conference servers
- Patent number 6,888,925
- Issue date May 3, 2005
- Snowshore Networks, Inc.
- Andy Spitzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Tone detection in communication networks
- Patent number 6,650,627
- Issue date Nov 18, 2003
- Avaya Technology Corp.
- Peter David Goldman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for using a VM tone to prevent a voice announc...
- Patent number 6,366,652
- Issue date Apr 2, 2002
- Telefonaktiebolaget LM Ericsson (publ)
- Lars Gunnar Folke Ahlström
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic detection of pots line
- Patent number 6,172,985
- Issue date Jan 9, 2001
- Gateway 2000, Inc.
- Timothy G. Gilbert
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for using a MS tone to prevent a voice announc...
- Patent number 6,154,645
- Issue date Nov 28, 2000
- Telefonaktiebolaget L M Ericsson (publ)
- Lars Gunnar Folke Ahlstrom
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Tone and periodical signal detection
- Patent number 6,122,652
- Issue date Sep 19, 2000
- Mitel Corporation
- Gary Q. Jin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line-powered detection of call progress tones
- Patent number 5,790,653
- Issue date Aug 4, 1998
- VoiceWaves, Inc.
- John P. Fairbanks
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interrupted tone converter
- Patent number 5,764,758
- Issue date Jun 9, 1998
- Aastra Aerospace Inc.
- Anthony P. Shen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal-recognition arrangement using cadence tables
- Patent number 5,719,932
- Issue date Feb 17, 1998
- Lucent Technologies Inc.
- Larry John Roybal
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Differing frequency sine wave generation from a look-up table
- Patent number 5,363,443
- Issue date Nov 8, 1994
- AT&T Bell Laboratories
- Norman W. Petty
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method of determining levels at given frequencies of a VF signal
- Patent number 5,353,344
- Issue date Oct 4, 1994
- Alcatel STR AG
- Martin A. Knitsch
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive multitone signaling method
- Patent number 5,353,342
- Issue date Oct 4, 1994
- Bell Communications Research, Inc.
- Stanley Pietrowicz
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call progress detection circuit
- Patent number 5,349,254
- Issue date Sep 20, 1994
- Matsushita Electric Corporation of America
- Dursun Sakarya
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for audible signaling tone recognition
- Patent number 5,311,589
- Issue date May 10, 1994
- AT&T Bell Laboratories
- Raymond W. Bennett
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call progress detection circuitry and method
- Patent number 5,311,588
- Issue date May 10, 1994
- InterVoice, Inc.
- Michael J. Polcyn
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for providing on-hook transmission for digital...
- Patent number 5,263,081
- Issue date Nov 16, 1993
- Hubbell Incorporated
- Roger A. Nightingale
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Independent hysteresis apparatus for tone detection
- Patent number 5,251,256
- Issue date Oct 5, 1993
- ROLM Company
- Andrew S. Crowe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Status management method of a signalling service device in an elect...
- Patent number 5,241,579
- Issue date Aug 31, 1993
- Electronics and Telecommunications Research Institute; Korea Telecommunicatio...
- Dae S. Kim
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Tone and announcement message code generator for a telephonic switc...
- Patent number 5,127,004
- Issue date Jun 30, 1992
- Rockwell International Corporation
- John P. Lenihan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line current test device
- Patent number 4,912,755
- Issue date Mar 27, 1990
- Independent Technologies, Inc.
- Dennis C. Blood
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone tone detector
- Patent number 4,868,872
- Issue date Sep 19, 1989
- Mitel Corporation
- Melvin J. Roberts
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Called party response detecting apparatus
- Patent number 4,811,386
- Issue date Mar 7, 1989
- Tamura Electric Works, Ltd.
- Yoshiki Sano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call progress monitor for a computer telephone interface
- Patent number 4,686,699
- Issue date Aug 11, 1987
- International Business Machines Corporation
- Bruce J. Wilkie
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DTMF Signal receiver
- Patent number 4,313,038
- Issue date Jan 26, 1982
- Wescom, Inc.
- Albert G. Nilssen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone supervision system using DTMF signals
- Patent number 4,219,699
- Issue date Aug 26, 1980
- Wescom, Inc.
- Albert G. Nilssen
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Using RTCP Statistics For Media System Control
- Publication number 20090240826
- Publication date Sep 24, 2009
- Wilfrid LeBlanc
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Signal detector
- Publication number 20050180529
- Publication date Aug 18, 2005
- Sigang Qiu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Using RTCP statistics for media system control
- Publication number 20040141528
- Publication date Jul 22, 2004
- Wilfrid LeBlanc
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Signal detector
- Publication number 20040125881
- Publication date Jul 1, 2004
- Sigang Qiu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Apparatus for testing an asymmetric digital subscriber line
- Publication number 20040076267
- Publication date Apr 22, 2004
- Christian Gadin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Polite call waiting notification
- Publication number 20040001584
- Publication date Jan 1, 2004
- Doree Duncan Seligmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Unified call classifier for processing speech and tones as a single...
- Publication number 20030083875
- Publication date May 1, 2003
- Micheal Kenneth Brown
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method for testing large-scale audio conference servers
- Publication number 20030083059
- Publication date May 1, 2003
- SNOWSHORE NETWORKS, INC.
- Andy Spitzer
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

with voice-band signalling frequencies

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Using RTCP statistics for media system control

Using RTCP statistics for media system control

Apparatus for testing an asymmetric digital subscriber line

Polite call waiting notification

Signal detector

Method for testing large-scale audio conference servers

Tone detection in communication networks

Method and apparatus for using a VM tone to prevent a voice announc...

Automatic detection of pots line

Method and apparatus for using a MS tone to prevent a voice announc...

Tone and periodical signal detection

Line-powered detection of call progress tones

Interrupted tone converter

Signal-recognition arrangement using cadence tables

Differing frequency sine wave generation from a look-up table

Method of determining levels at given frequencies of a VF signal

Adaptive multitone signaling method

Call progress detection circuit

Apparatus and method for audible signaling tone recognition

Call progress detection circuitry and method

Method and apparatus for providing on-hook transmission for digital...

Independent hysteresis apparatus for tone detection

Status management method of a signalling service device in an elect...

Tone and announcement message code generator for a telephonic switc...

Line current test device

Telephone tone detector

Called party response detecting apparatus

Call progress monitor for a computer telephone interface

DTMF Signal receiver

Telephone supervision system using DTMF signals

Patents Applicationslast 30 patents

Using RTCP Statistics For Media System Control

Signal detector

Using RTCP statistics for media system control

Signal detector

Apparatus for testing an asymmetric digital subscriber line

Polite call waiting notification

Unified call classifier for processing speech and tones as a single...

Method for testing large-scale audio conference servers