Switchable POTS splitter

Switched line modem interface system

Switching control apparatus for a communication terminal having

Switching controller with supervisory mode for communication ter

Switching device for connecting a data transmission system to th

Switching device for controlling power to appliances and muting

Switching system for application services

Synchronous voice/data message system

System allowing selective connection of various types of externa

System and device for communications

System and method for active filtering in a...

System and method for adding multiple line capabilities to...

System and method for automatically selecting the mode of commun

System and method for capturing accounting data for a...

System and method for collecting, disseminating and managing...

System and method for communicating audio data signals via...

System and method for communicating audio information...

System and method for communicating electronic messages over a t

System and method for communicating with an out of service...

System and method for communicating with an out of service...