Data communication device and data communication method

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 dial system and method

Data interface apparatus and method

Data interface circuit for portable terminal equipment

Data interface for telephone system

Data link for multi-player game system using telephone lines

Data message storage and pick up service

Data processing system having a programmable modem and method th

Data processing system having a programmable modem and...

Data processing system, method and program for constructing host

Data radio communication apparatus and system

Data station termination circuit

Data terminal having program language support library, and relat

Data transfer device