Devices, softwares and methods for selectively limiting the...

Dial on demand communication

Dial up telephone conferencing system controlled by an...

Dial-up line modem directly compatible with mainframe host havin

Digital communication system using telephone line and...

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 text messaging system and method

Direct access arrangement (DAA) circuit having automatic...

Direct connect modem deriving power from telephone line

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