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Class Information
Number: 379/386
Name: Telephonic communications > Supervisory or control line signaling > Signal receiver (e.g., tone decoder)
Description: Subejct matter for receiving the supervisory or control line signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620160 |
Announcing presence information during telephone call ringback |
Nov. 17, 2009 |
| 7602902 |
Method and apparatus for decoding DTMF tones |
Oct. 13, 2009 |
| 7529363 |
Tone detector and method therefor |
May. 5, 2009 |
| 7388954 |
Method and apparatus for tone indication |
Jun. 17, 2008 |
| 7277537 |
Tone, modulated tone, and saturated tone detection in a voice activity detection device |
Oct. 2, 2007 |
| 7272136 |
Dual tone multi frequency signal detection |
Sep. 18, 2007 |
| 7272233 |
Acoustic shock prevention |
Sep. 18, 2007 |
| 7245637 |
Methods and apparatus for suppressing signaling tones in telephony signal |
Jul. 17, 2007 |
| 7236585 |
Apparatus and method for noise immunity during signal detection |
Jun. 26, 2007 |
| 7227943 |
Tone detector |
Jun. 5, 2007 |
| 7187656 |
Method and system for processing tones to reduce false detection of fax and modem communications |
Mar. 6, 2007 |
| 7184542 |
DTMF tone detection |
Feb. 27, 2007 |
| 7158543 |
V.8bis suppression method and apparatus for modem relay |
Jan. 2, 2007 |
| 7139380 |
System and method for performing signaling-plan-specific call progress analysis |
Nov. 21, 2006 |
| 7133521 |
Method and apparatus for DTMF detection and voice mixing in the CELP parameter domain |
Nov. 7, 2006 |
| 7095845 |
Dual hysteresis signal detection circuit |
Aug. 22, 2006 |
| 7088817 |
Method and apparatus for performing high-density DTMF, MF-R1, MF-R2 detection |
Aug. 8, 2006 |
| 7085370 |
Ringback detection circuit |
Aug. 1, 2006 |
| 7085371 |
Push-button signal receiving device and a gain control method |
Aug. 1, 2006 |
| 7068734 |
Passive redundant digital data receiver with schmitt-trigger |
Jun. 27, 2006 |
| 7068781 |
Alarm of a telecommunications terminal connected to a LAN |
Jun. 27, 2006 |
| 7054435 |
Apparatus and method for determining a minimal time bound for performing tone detection |
May. 30, 2006 |
| 7050570 |
DTMF signal transmission method and communication apparatus |
May. 23, 2006 |
| 7043012 |
Method and apparatus for ring again feature for a telephone system |
May. 9, 2006 |
| 7035394 |
Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals |
Apr. 25, 2006 |
| 7023981 |
Method and apparatus for signal detection |
Apr. 4, 2006 |
| 7020274 |
Universal apparatus and method for interfacing signals with telephony networks |
Mar. 28, 2006 |
| 7020272 |
High density signal classifier for media gateways |
Mar. 28, 2006 |
| 7010117 |
Multi-frequency tone detector |
Mar. 7, 2006 |
| 7003093 |
Tone detection for integrated telecommunications processing |
Feb. 21, 2006 |
| 6950511 |
Detection of both voice and tones using Goertzel filters |
Sep. 27, 2005 |
| 6940966 |
Method and apparatus for detection of a telephone CPE alerting signal |
Sep. 6, 2005 |
| 6937717 |
Low power signal detection |
Aug. 30, 2005 |
| 6925170 |
Wire-bound telecommunication device and a circuit for use in such a device |
Aug. 2, 2005 |
| 6914979 |
Tone detection |
Jul. 5, 2005 |
| 6873701 |
System and method for DTMF detection using likelihood ratios |
Mar. 29, 2005 |
| 6868156 |
Non-voice signal repeater for speech coders |
Mar. 15, 2005 |
| 6850616 |
Frequency error detection methods and systems using the same |
Feb. 1, 2005 |
| 6842517 |
Meter pulse filtering circuit for analog modems |
Jan. 11, 2005 |
| 6813529 |
Method and apparatus for signal frequency decoding without an analog bandpass filter |
Nov. 2, 2004 |
| 6813350 |
Method and apparatus for detecting dual tone alerting signal in telephone systems |
Nov. 2, 2004 |
| 6801622 |
Devices, software and methods for passing DTMF signals under voice compression |
Oct. 5, 2004 |
| 6798880 |
System and method for suppressing in-band stimuli and telecommunications infrastructure incorporating the same |
Sep. 28, 2004 |
| 6782095 |
Method and apparatus for performing spectral processing in tone detection |
Aug. 24, 2004 |
| 6771767 |
Signal detector with coefficient swapping transform unit |
Aug. 3, 2004 |
| 6763106 |
Signal detector with duration-based frame width |
Jul. 13, 2004 |
| 6754324 |
Systems and methods for no-answer redial and connect |
Jun. 22, 2004 |
| 6731747 |
Signal detector with echo cancellation |
May. 4, 2004 |
| 6728369 |
Method and device for distinguishing among a plurality of devices and data elements with a sequence of signals |
Apr. 27, 2004 |
| 6711205 |
Tone detector for use in a modem |
Mar. 23, 2004 |
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