System and method for distributing power over a premises...

System and method for echo cancelling and mobile communications

System and method for interfacing plain old telephone system...

System and method for optimizing digital subscriber line...

System and method for optimizing digital subscriber line...

System and method for performing echo cancellation in a communic

System and method for protecting devices connected to a...

System and method for protecting devices connected to a...

System and method for providing lifeline power service to...

System and method for providing power over a home phone line...

System and method for providing power over a home phone line...

System and method for the powering and fault protection of...

System and method for transferring echo cancellation data

System and methods for modem interface

System for bidirectional digital transmission with echo cancella

System for powering a switch over data communication cabling...

System for protecting telecommunications equipment from...

System for providing pots splitters externally with respect...

System for providing universal cross-connect connectivity in...

System for reducing distortion in a line powered modulator