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Class Information
Number: 379/322
Name: Telephonic communications > Centralized switching system > Power supply
Description: Subject matter which supplies electricity to a telephone system component.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620171 |
Method and apparatus for powering a DS3 device |
Nov. 17, 2009 |
| 7599485 |
Communications system employing single-pair identity circuit for remotely powered device |
Oct. 6, 2009 |
| 7564904 |
Apparatus for and method of detection of powered devices over a network |
Jul. 21, 2009 |
| 7552348 |
Method and apparatus for detecting and supplying power by a first network device to a second network device |
Jun. 23, 2009 |
| 7457647 |
Remote battery replacement notification system and method |
Nov. 25, 2008 |
| RE40492 |
Power line telephony exchange |
Sep. 9, 2008 |
| 7376229 |
System identification module for a communications system |
May. 20, 2008 |
| 7343156 |
Method for logging on a portable part at a base station and base station for carrying out the method |
Mar. 11, 2008 |
| 7239697 |
Supply power transition control |
Jul. 3, 2007 |
| 7209554 |
Ringing controller |
Apr. 24, 2007 |
| 7203851 |
Method and apparatus for detecting and supplying power by a first network device to a second network device |
Apr. 10, 2007 |
| 7130414 |
Active mode line voltage regulator for ringing subscriber line interface circuit |
Oct. 31, 2006 |
| 7123215 |
Glasses type display and controlling method thereof |
Oct. 17, 2006 |
| 7113591 |
Current sense circuit in a line powered network element |
Sep. 26, 2006 |
| 7095848 |
Power up reset circuit for line powered circuit |
Aug. 22, 2006 |
| 7058174 |
System and method for providing lifeline power service to digital subscriber line customers |
Jun. 6, 2006 |
| 7039062 |
System and method for pulsed cable telephony |
May. 2, 2006 |
| 6975209 |
In-line power tap device for Ethernet data signal |
Dec. 13, 2005 |
| 6922470 |
Hybrid DC-feed controller for a subscriber line interface circuit |
Jul. 26, 2005 |
| 6804347 |
Replacing telecommunications carrier equipment |
Oct. 12, 2004 |
| 6804351 |
Method and apparatus for detecting a compatible phantom powered device using common mode signaling |
Oct. 12, 2004 |
| 6760430 |
System and method for reducing power dissipation in line driver circuits |
Jul. 6, 2004 |
| 6751486 |
Hands free charger for a handset and handset |
Jun. 15, 2004 |
| 6735301 |
Method and device for distributing electric power in telecommunication central office equipment |
May. 11, 2004 |
| 6668058 |
Power line telephony exchange |
Dec. 23, 2003 |
| 6577882 |
Arrangement and a method relating to power supply in a communications network |
Jun. 10, 2003 |
| 6560244 |
Subscriber network terminal of an access line network and method for operating a network connecting unit |
May. 6, 2003 |
| 6381477 |
Method and apparatus for protecting a circuit module in a communication device |
Apr. 30, 2002 |
| 6144737 |
Trunk interface circuit having function of battery feed to central office |
Nov. 7, 2000 |
| 6144736 |
T1 channel bank control and apparatus |
Nov. 7, 2000 |
| 6005933 |
Method for communication with no power feed and exchange for realizing the method |
Dec. 21, 1999 |
| 5912957 |
Technique for reconnecting office line to key telephone system after power failure |
Jun. 15, 1999 |
| 5818125 |
Secondary source of energy system for powering communications hardware and services and associated method |
Oct. 6, 1998 |
| 5815569 |
Method for controlling power losses associated with line interface circuits in telecommunications networks |
Sep. 29, 1998 |
| 5694398 |
Network termination and network termination arrangement of a telecommunications network |
Dec. 2, 1997 |
| 5682423 |
Electrical power and telephone ringer signal distribution system |
Oct. 28, 1997 |
| 5661796 |
Telephone set |
Aug. 26, 1997 |
| 5608792 |
Apparatus for drawing and processing electrical power from a communications line |
Mar. 4, 1997 |
| 5581612 |
Private branch exchange system |
Dec. 3, 1996 |
| 5555301 |
Power supply apparatus and method for energizing telephone alerting mechanisms and circuitry |
Sep. 10, 1996 |
| 5504413 |
Battery charging system with power management of plural peripheral devices |
Apr. 2, 1996 |
| 5428674 |
Communication terminal device and dialing key |
Jun. 27, 1995 |
| 5381472 |
Power source control apparatus for telephone set |
Jan. 10, 1995 |
| 5323453 |
Power down feed |
Jun. 21, 1994 |
| 5323460 |
Enhanced subscriber line interface circuit |
Jun. 21, 1994 |
| 5175764 |
Enhanced high voltage line interface circuit |
Dec. 29, 1992 |
| 5172407 |
Circuit for generating metering pulses intended for presentation to a telecommunication subscriber |
Dec. 15, 1992 |
| 4964158 |
Power supply for telephone exchange |
Oct. 16, 1990 |
| 4706281 |
Dynamic impedance element for a battery feed circuit |
Nov. 10, 1987 |
| 4679232 |
Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed |
Jul. 7, 1987 |
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