signalling
Related Words
communicationindicationcueingbeaconingsilenceconcealmentobscuritysemaphorebeaconflaggestureindicatortransmissioncodesymbolmessagerelayantennafrequencywavelengthradiotelecommunicationlightflashflarewhistlealarmwarningnotificationcuetokenmarkertraffic lightrailwayswitchinterlockingdispatchbroadcastmodulationamplitudephasepulsebinarydigitalanalogtransmitterreceiversensordetectorfeedbackinputoutputprotocolhandshakeencryptiondecryptionciphersign languagebody languagenonverbalmanifestationsymptomomenportentheraldsmoke signal