Data transmission system
Data transmission system
Data transmission system for a multiple branch network
Data transmission system with multiple access for the...
Data transmission systems
Data transmission systems
Data transmitting terminal
Data under voice communications system
Data/facsimile telephone subset apparatus incorporating...
Dc control circuit
Dc power source for an accessory of a portable communication...
Dc suppression for pcm modems
Dc termination circuit for 2b1q isdn basic rate physical...
Dc/ac discriminating and dc detection arrangement
Dealer-locator service and apparatus for a mobile...
Decision network based event pricing system in a component...
Dedicated speed-dial pre-paid telephone calling card
Deformable base member for a telephone set
Delay estimator
Delayed cancel call waiting