System for providing pots splitters externally with respect...
System for providing universal cross-connect connectivity in...
System identification method and apparatus by adaptive filter
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 process and apparatus
Technique for reducing echoes in conference communications
Telecommunication line circuit
Telecommunications apparatus and plug-in unit for same
Telecommunications chassis and card
Telecommunications system, an automatic branch exchange, a line
Telephone battery feed circuit including noise reduction circuit
Telephone circuit using DC blocked transformer and negative impe
Telephone headset interface circuit
Telephone headset interface circuit
Telephone line interface circuit
Telephone line sourced power supply
Telephone network speech signal enhancement