Data communication apparatus having automatic data reception inf

Data communication apparatus having the function of automaticall

Data communication apparatus including volatile and non-volatile

Data communication apparatus which can selectively store data or

Data communication apparatus which can use either an analog or a

Data communication apparatus with an abbreviated dial key having

Data communication apparatus with interrupt completion detecting

Data communication apparatus with voice communication control

Data communication circuit and method using telephone system

Data communication device

Data communication device and data communication method

Data communication method and apparatus including volatile and n

Data communication over telephone voice channel using DTMF...

Data communication process suitable for use in a quiet environme

Data communication system and apparatus for transmitting data on

Data communication system between a personal computer and facsim

Data communication system for supplementing telephone calls

Data communications system for establishing links between subscr

Data correction system for communications network

Data correction system for communications network