COVID-19: As a designated essential telecom solutions provider, EXFO remains fully operational with our employees' health and safety as our top priority.
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La tecnología evoluciona a gran velocidad. Por eso, creamos un glosario fácil de usar que lo ayude a entender mejor los términos, las tecnologías y las tendencias que afectan su negocio.
Used for telecommunication signaling over analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center. The version of DTMF that is used in push-button telephones for tone dialing is known as Touch-Tone. DTMF is standardized by ITU-T Recommendation Q.23. Other multifrequency systems are used for internal signaling within the telephone network.