Digital screen phone terminal with graphical user interface
Digital subscriber line service over loaded loops
Digital telecommunications exchange system
Digital telephone data and control signal transmission system
Digital telephone set
Digital telephone switch
Digital telephonic system for stethoscope signal processing
Digital text messaging system and method
Direct access arrangement (DAA) circuit having automatic...
Direct connect modem deriving power from telephone line
Direct telephone dial ordering service
Direct telephone dial ordering service
Directionally-mapped, keyed alpha -numeric data input/output...
Directionally-mapped, keyed alpha-numeric data input/output...
Directionally-mapped, keyed alpha-numeric data input/output...
Directory delivery system and method for a digital...
Disclosing the receipt of new electronic message
Display for a telephone terminal
Display object selection system
Distant remote-control device of electric appliance