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Bidirectional buffered interface for crosspoint switch |
— |
2009-02-17 |
| 7482853 |
Method and apparatus for switching audio and data signals through a single terminal |
Donald Giles Koch, Douglas Youngblood |
2009-01-27 |
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Digitally configurable multiplexer/de-multiplexer |
Douglas Youngblood |
2008-06-10 |
| 7020248 |
Apparatus and method for testing subscriber loop interface circuits |
— |
2006-03-28 |
| 6931108 |
Integrated POTS/DSL line driver with floating supply voltage |
— |
2005-08-16 |
| 6665398 |
Programmable subscriber loop interface circuit and method |
— |
2003-12-16 |
| 6519322 |
Apparatus and method for testing subscriber loop interface circuits |
— |
2003-02-11 |
| 6434232 |
Apparatus and method for measuring loop impedance |
— |
2002-08-13 |
| 6233335 |
Battery switching subscriber loop interface circuit |
— |
2001-05-15 |
| 5659570 |
Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit |
Gerald M. Cotreau, Donald K. Whitney |
1997-08-19 |
