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Class Information
Number: 379/413.01
Name: Telephonic communications > Subscriber line or transmission line interface > Power supply (e.g., battery feed) > Circuitry to provide ringing current supply
Description: Subject matter including an electronic circuit component which provides the ringing current supply function of the BORSCHT functions to a subscriber line.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7555117 |
Path change detector for echo cancellation |
Jun. 30, 2009 |
| 7480378 |
Method and system for increasing subscriber line interface circuit voltage during ringing |
Jan. 20, 2009 |
| 7454013 |
Multiuse telecommunications power system |
Nov. 18, 2008 |
| 7450712 |
Low voltage sensing and control of battery referenced transistors in subscriber loop applications |
Nov. 11, 2008 |
| 7260103 |
Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit |
Aug. 21, 2007 |
| 7260210 |
Unbalanced slic with a built-in ring circuit |
Aug. 21, 2007 |
| 7257223 |
Splitter assembly for a telecommunications system |
Aug. 14, 2007 |
| 7257222 |
Ring voltage generation circuit and method for generating a ring voltage |
Aug. 14, 2007 |
| 7251321 |
Crescendo telephone ringer |
Jul. 31, 2007 |
| 7242764 |
Power feeding system for telephone terminal in LAN |
Jul. 10, 2007 |
| 7239695 |
Method and apparatus for detecting line card threshold |
Jul. 3, 2007 |
| 7218713 |
Telephone line interface for DAA circuitry |
May. 15, 2007 |
| 7209554 |
Ringing controller |
Apr. 24, 2007 |
| RE39406 |
Telephone line coupler |
Nov. 21, 2006 |
| 7099462 |
Silent ringing with reduced device sizes |
Aug. 29, 2006 |
| 7088819 |
Localization of an IP telecommunications terminal over a LAN |
Aug. 8, 2006 |
| 7085372 |
Method and device for transmitting a transmission signal via a two-core line |
Aug. 1, 2006 |
| 7072463 |
Apparatus and method for programmable line interface impedance matching |
Jul. 4, 2006 |
| 7046797 |
Telephone system with controllable ringing voltage |
May. 16, 2006 |
| 7046793 |
Digital access arrangement circuitry and method having current ramping control of the hookswitch |
May. 16, 2006 |
| 7031464 |
Ring relay control unit for foreign exchange station |
Apr. 18, 2006 |
| 7010120 |
Method for adjusting a ringing signal current in a subscriber line and circuit arrangement |
Mar. 7, 2006 |
| 7003103 |
Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit |
Feb. 21, 2006 |
| 6975723 |
Architecture for minimum loop current during ringing and caller ID |
Dec. 13, 2005 |
| 6973178 |
Method and apparatus for implementing a bandlimited ringing signal for telephone networks |
Dec. 6, 2005 |
| 6973181 |
Method of generating a ring signal in a subscriber line interface circuit technical field |
Dec. 6, 2005 |
| 6970557 |
Cordless telephone-to-sound card interface adapter having a hybrid transformer circuit |
Nov. 29, 2005 |
| 6930751 |
Method and apparatus for reducing false hook detection |
Aug. 16, 2005 |
| 6925178 |
Returning ringing signals through the tip amplifier of subscriber-line interface circuitry |
Aug. 2, 2005 |
| 6922469 |
Separation of ring detection functions across isolation barrier for minimum power |
Jul. 26, 2005 |
| 6917681 |
Peak power management and active decoupling arrangement for span-powered remote terminal access platforms |
Jul. 12, 2005 |
| 6914980 |
Power switch device utilizing phone loop signals to control supply of electrical power to a telephony instrument |
Jul. 5, 2005 |
| 6912282 |
Enabling Cisco legacy power to support IEEE 802.3 AF standard power |
Jun. 28, 2005 |
| 6888939 |
Circuit for joint transmitting voice and data over a telephone line |
May. 3, 2005 |
| 6873702 |
Telephone subscriber system |
Mar. 29, 2005 |
| 6842520 |
Telephone |
Jan. 11, 2005 |
| 6839428 |
Sealed terminating device |
Jan. 4, 2005 |
| 6826278 |
Central office interface techniques for digital subscriber lines |
Nov. 30, 2004 |
| 6823066 |
Digital access arrangement circuitry and method having current ramping control of the hookswitch |
Nov. 23, 2004 |
| 6813353 |
Redundant operation of ring voltage generators utilizing voltage bus segmentation for fault isolation |
Nov. 2, 2004 |
| 6813340 |
Ringing SLIC fault handling |
Nov. 2, 2004 |
| 6804353 |
Splitter assembly with high density backplane board |
Oct. 12, 2004 |
| 6804352 |
High circuit density pots splitter assembly |
Oct. 12, 2004 |
| 6795552 |
Enhanced services network interface device |
Sep. 21, 2004 |
| 6782098 |
Protection circuit/method for subscriber telephone interface circuit |
Aug. 24, 2004 |
| 6757382 |
Quasi ground fault interruption signal-based activation of emergency pots by-pass paths for line-powered digital subscriber loop |
Jun. 29, 2004 |
| 6748078 |
System and method for allocating overhead voltage in the transmission of pots and XDSL signals |
Jun. 8, 2004 |
| 6741702 |
Device for connecting a subscriber line to a high frequency link and to a low frequency link |
May. 25, 2004 |
| 6700974 |
Switching power supply for generating a ringing voltage |
Mar. 2, 2004 |
| 6690792 |
Active decoupling and power management circuit for line-powered ringing generator |
Feb. 10, 2004 |
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