🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийفارسی한국어中文日本語EntityQ941685· pop 28· linked from 283 articlesDual-tone multi-frequency signalingAlso known as Dual-tone multi-frequency, DTMF, Touch Tone, Tone dialing, Touch-tone dialingtelecommunication signaling systemAvailable in 27 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoBahasa IndonesiaBasqueBulgarianConnectionssignalingEntitycommunication protocolEntityCategoriesBroadcast engineeringTelephony signals