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Class Information
Number: 379/387.01
Name: Telephonic communications > Substation or terminal circuitry
Description: Subject matter comprising electrical relationships of circuit elements of a terminal set or a group of such sets connected to a single line circuit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7590385 |
System for sharing human perceptual signals between electronic devices |
Sep. 15, 2009 |
| 7536004 |
Signaling system |
May. 19, 2009 |
| 7496187 |
In-bound call directed telephone station and method of directing a telephone station based on an in-bound call |
Feb. 24, 2009 |
| 7412044 |
Instant messaging to and from PBX stations |
Aug. 12, 2008 |
| 7388955 |
Combine audio and ringing mode |
Jun. 17, 2008 |
| 7386118 |
Micro modem |
Jun. 10, 2008 |
| 7340070 |
Voice-data processing circuit and voice-data processing method |
Mar. 4, 2008 |
| 7327840 |
Loudspeaker telephone equalization method and equalizer for loudspeaker telephone |
Feb. 5, 2008 |
| 7302055 |
Discharging envelope detector |
Nov. 27, 2007 |
| 7302053 |
System and method for providing a communication session |
Nov. 27, 2007 |
| 7293103 |
Enhanced channel access mechanisms for a HPNA network |
Nov. 6, 2007 |
| 7272224 |
Echo cancellation |
Sep. 18, 2007 |
| 7245637 |
Methods and apparatus for suppressing signaling tones in telephony signal |
Jul. 17, 2007 |
| 7245710 |
Teleconferencing system |
Jul. 17, 2007 |
| 7239694 |
Integrated circuit configurations and methods for providing functions for public telephones |
Jul. 3, 2007 |
| 7227944 |
Echo reduction for a headset or handset |
Jun. 5, 2007 |
| 7218728 |
Telephone terminal device |
May. 15, 2007 |
| 7197124 |
In-bound call directed telephone station and method of directing a telephone station based on an in-bound call |
Mar. 27, 2007 |
| 7197136 |
Digital portable telephone set |
Mar. 27, 2007 |
| 7180997 |
Method and system for improving the intelligibility of a moderator during a multiparty communication session |
Feb. 20, 2007 |
| 7177416 |
Channel control and post filter for acoustic echo cancellation |
Feb. 13, 2007 |
| 7162016 |
Multimedia adapter for headset amplifier |
Jan. 9, 2007 |
| 7155005 |
Apparatus for ring-back constriction |
Dec. 26, 2006 |
| RE39406 |
Telephone line coupler |
Nov. 21, 2006 |
| 7136670 |
Mobile communication device with audio recorder |
Nov. 14, 2006 |
| 7130415 |
Line Driver apparatus |
Oct. 31, 2006 |
| 7130412 |
Telecommunication line driver having synthesized output impedance derived from output current sensing circuit |
Oct. 31, 2006 |
| 7106852 |
Telephone accessory for generating conversation utterances to a remote listener in response to a quiet selection |
Sep. 12, 2006 |
| 7099463 |
Method and apparatus for detecting a compatible phantom powered device using common mode signaling |
Aug. 29, 2006 |
| 7092512 |
Call control device and call control method |
Aug. 15, 2006 |
| 7085371 |
Push-button signal receiving device and a gain control method |
Aug. 1, 2006 |
| 7079645 |
Speaker volume control for voice communication device |
Jul. 18, 2006 |
| 7065205 |
Line sharing multipoint pots splitter amplifier-based coupler |
Jun. 20, 2006 |
| 7058172 |
Long distance bidirectional driver |
Jun. 6, 2006 |
| 7058171 |
IP telephone apparatus and IP telephone system |
Jun. 6, 2006 |
| 7039178 |
System and method for generating a simultaneous mixed audio output through a single output interface |
May. 2, 2006 |
| 7039179 |
Echo reduction for a headset or handset |
May. 2, 2006 |
| 7035395 |
Digital communication system |
Apr. 25, 2006 |
| 7031454 |
Method and apparatus for interfacing telephone apparatus to a digital, analog or hybrid telephone switching system |
Apr. 18, 2006 |
| 7023982 |
Telephone plug system |
Apr. 4, 2006 |
| 7020273 |
Communication terminal provided for a user selected distortion of an acoustic input |
Mar. 28, 2006 |
| 7003092 |
Automated microphone switch controlled by a CTI combo |
Feb. 21, 2006 |
| 6980641 |
Method and apparatus for controlling a computer to implement telephone functions with an enhanced minidialer function |
Dec. 27, 2005 |
| 6980837 |
Automatic mode changing method for car audio system with hands-free therein |
Dec. 27, 2005 |
| 6973179 |
Pocket speakerphone |
Dec. 6, 2005 |
| 6952672 |
Audio source position detection and audio adjustment |
Oct. 4, 2005 |
| 6944286 |
Ground key detection circuit and method for interference-resistant detection of the activation of a ground key for telephones |
Sep. 13, 2005 |
| 6940967 |
Multirate speech codecs |
Sep. 6, 2005 |
| 6917681 |
Peak power management and active decoupling arrangement for span-powered remote terminal access platforms |
Jul. 12, 2005 |
| 6895089 |
Pots splitter with line impedance matching |
May. 17, 2005 |
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