telegraphy
Từ liên quan
telecommunicationtelegraphtelegramsignaltransmissionwirecableelectricitycommunicationoperatorkeycircuitrelaybatteryantennafrequencywavelengthmodulationpulsedotdashciphercodeencryptiondecryptionmessagedispatchwire servicepost officetelephonyradiowirelessbroadcastingelectronicsphysicselectromagnetismcurrentvoltageresistanceconductorinsulatorterminalswitchnetworkinfrastructurebandwidthlatencyprotocolsynchronizationanalogdigitalbinarybitbyteinformationdatatelecommunicationssemaphorefaxinternetsatellitemicrowavefiber optictransmission lineamplifieroscillatorcapacitorinductortransistorvacuum tubehubnodelinkspectrumcarrier waveinterferencenoiseattenuationpropagation