Data transmission and storage
Data transmission over an in-use transmission medium
Data transmission processing machine
Data transmission system
Data transmitting/receiving apparatus and data communication sys
Data transmitting/receiving apparatus and data communication sys
Data/facsimile telephone subset apparatus incorporating electrop
Data/facsimile telephone subset apparatus incorporating electrop
Dedicated data modem system and method
Dedicated data modem system and method
Delivery of customer data base key using automatic number identi
Delivery-information management method and...
Detection and authentication of multiple integrated receiver...
Detection of a call-waiting tone by a modem
Detection of TDD signals in an automated telephone system
Determining and disclosing the indentity of telephone caller
Determining whether a telephony call is permitted based on...
Device and method for isolating voice and data signals on a comm
Device and method for telecommunication systems
Device and method to establish communication