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Class Information
Number: 379/372
Name: Telephonic communications > Supervisory or control line signaling > Signal reception at substation
Description: subject matter wherein a control or line signal is received at a subscriber terminal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7398084 |
Method and system of correlating dissimilar call records to a high level aggregated view |
Jul. 8, 2008 |
| 7389104 |
Methods, systems and apparatus for providing urgent public information |
Jun. 17, 2008 |
| 7266187 |
Caller ID system with retransmitted caller ID information |
Sep. 4, 2007 |
| 7236585 |
Apparatus and method for noise immunity during signal detection |
Jun. 26, 2007 |
| 7197134 |
DTMF generating assistant |
Mar. 27, 2007 |
| 7194249 |
Methods, systems and apparatus for providing urgent public information |
Mar. 20, 2007 |
| 7190771 |
Internet telephony devices with circuity to announce incoming calls |
Mar. 13, 2007 |
| 7184542 |
DTMF tone detection |
Feb. 27, 2007 |
| 7142664 |
Intelligent multimode message alerts |
Nov. 28, 2006 |
| RE39406 |
Telephone line coupler |
Nov. 21, 2006 |
| 7124313 |
Data processing device and method of controlling power consumption in back-light in data processing device |
Oct. 17, 2006 |
| 7116769 |
Telephone having phone number registration function, phone number registration method, and call register display method |
Oct. 3, 2006 |
| 7110529 |
Bookmarking method and apparatus for an electronic phone book |
Sep. 19, 2006 |
| 7106846 |
System and method for caller control of a distinctive ring |
Sep. 12, 2006 |
| 7088817 |
Method and apparatus for performing high-density DTMF, MF-R1, MF-R2 detection |
Aug. 8, 2006 |
| 7043012 |
Method and apparatus for ring again feature for a telephone system |
May. 9, 2006 |
| 7020628 |
Method and system for tracking computer system usage through a remote access security device |
Mar. 28, 2006 |
| 6999581 |
Event detection circuit |
Feb. 14, 2006 |
| 6996228 |
Motor for generating vibrational signal |
Feb. 7, 2006 |
| 6954531 |
Software controlled ring voltage generator |
Oct. 11, 2005 |
| 6937880 |
Telecommunication device with improved call-priority notification function and method of notification of call-priority |
Aug. 30, 2005 |
| 6937716 |
Method of automatically changing a calling mode of telephone as timer setting changes |
Aug. 30, 2005 |
| 6914979 |
Tone detection |
Jul. 5, 2005 |
| 6856682 |
System and method for processing an input signal communicated on a telephone line |
Feb. 15, 2005 |
| 6850608 |
Process for assigning a called number to customer premises equipment |
Feb. 1, 2005 |
| 6801602 |
Method of initiating a call feature request |
Oct. 5, 2004 |
| 6763105 |
Telephone with call-incoming-operation limiting function and method of limiting call-incoming operation of telephone |
Jul. 13, 2004 |
| 6728367 |
Apparatus and method for filtering voiceband and metering tone frequencies of a mixed voice/data signal |
Apr. 27, 2004 |
| 6714644 |
Ringing scheduling for FXS ports on platforms with limited power supply |
Mar. 30, 2004 |
| 6711245 |
Method and apparatus for processing call progress of a serial communication device |
Mar. 23, 2004 |
| 6693993 |
Emergency notification and rescue request system |
Feb. 17, 2004 |
| 6683948 |
Device for automatically identifying DTMF and FSK for caller ID |
Jan. 27, 2004 |
| 6668059 |
Telephone tuning and signaling system |
Dec. 23, 2003 |
| 6650751 |
Answer detection for IP based telephones using passive detection |
Nov. 18, 2003 |
| 6628779 |
Method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors |
Sep. 30, 2003 |
| 6625276 |
Method and circuit for detecting ring and caller-ID signals |
Sep. 23, 2003 |
| 6618473 |
Telephone caller screening device |
Sep. 9, 2003 |
| 6587559 |
Cross-frame dual tone multifrequency detector |
Jul. 1, 2003 |
| 6574335 |
Method for simulating a ring back for a call between parties in different communication networks |
Jun. 3, 2003 |
| 6567519 |
System and method for processing an input signal communicated on a telephone line |
May. 20, 2003 |
| 6542599 |
Subscriber system transmission apparatus with line concentrating capability |
Apr. 1, 2003 |
| 6504912 |
Method of initiating a call feature request |
Jan. 7, 2003 |
| 6393124 |
CPE alert signal tone detector |
May. 21, 2002 |
| 6320923 |
BWR jet pump wedge keeper |
Nov. 20, 2001 |
| 6263073 |
Method of improving the CAS tone signal detection of a telephone and the apparatus therefor |
Jul. 17, 2001 |
| 6263071 |
Telecommunications functions management system providing distinctive alerting based on caller selected option |
Jul. 17, 2001 |
| 6246761 |
Automatic volume control for a telephone ringer |
Jun. 12, 2001 |
| 6243461 |
Caller-identification receiving apparatus |
Jun. 5, 2001 |
| 6173054 |
Adaptive call progress tone detection system |
Jan. 9, 2001 |
| 6169792 |
Method and apparatus for implementing automatic number identification system for DAA |
Jan. 2, 2001 |
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