Station to station message arrangement
Statistical analysis system for use with public communication fa
Storage-and-forward apparatus
Store and forward switching type communication control apparatus
Subscriber initiated non-intrusive network-based analysis of fac
Subscriber terminal for ISDN networks
Superposition of data over voice
Superposition of data over voice
Supervisory interface controller and method for remotely control
Switch device adapted to interface between an incoming telephone
Switch system for directing call from a calling to a receiving i
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