Method and apparatus for enabling multiple protocol...

Method and apparatus for feeding power to a telephone line such

Method and apparatus for improved control and time sharing of an

Method and apparatus for interfacing analog telephone...

Method and apparatus for isolation in a data access...

Method and apparatus for maintaining audio sample correlation

Method and apparatus for minimizing the telephony ring...

Method and apparatus for monitoring subscriber loop...

Method and apparatus for phantom battery feed

Method and apparatus for providing a ground reference for teleph

Method and apparatus for providing service to VODSL derived...

Method and apparatus for reducing distortion in a line...

Method and apparatus for removing FSK in-band signaling

Method and apparatus for ringing

Method and apparatus for spectral containment over telephone...

Method and apparatus for spectral containment over telephone...

Method and apparatus for stabilization of a line powered...

Method and apparatus for subscriber line control circuit

Method and apparatus for supplying power to a twisted pair...

Method and apparatus for transmitting white noise for echo cance