System identification method and apparatus by adaptive filter
System including an alternate power source for a...
Systems and methods for interfacing telephony devices with...
Systems and methods for managing digital subscriber line...
Systems and methods for passing through alternative network...
Systems and methods for providing application services
T1 channel bank control and apparatus
T1 channel bank control process and apparatus
T1 channel bank control process and apparatus
T1 channel bank control process and apparatus
T1 channel bank control process and apparatus
Technique for reducing echoes in conference communications
Techniques for providing uninterrupted digital...
Techniques for providing uninterrupted digital...
Telecommunicaations equipment terminal
Telecommunication line circuit
Telecommunication system and a linecard
Telecommunications apparatus and plug-in unit for same
Telecommunications chassis and card
Telecommunications gateway and method