---
title: Dual-Tone Multifrequency (DTMF)
description: The Dual-Tone Multifrequency (DTMF) is a telephone signaling system used to route telephone calls to appropriate operators that is supported by the ITSP. DTMF uses two frequency tones placed into the audible speech band of a telephone channel to transmit signaling information in analog lines.
---

[Top Contact Center Terminology And Metrics List](https://blog.revation.com/top-contact-center-terminology-and-metrics-list)

# [Dual-Tone Multifrequency (DTMF)](https://blog.revation.com/top-contact-center-terminology-and-metrics-list/dual-tone-multifrequency-dtmf)

 Written by [Revation Systems](https://blog.revation.com/top-contact-center-terminology-and-metrics-list/author/revation-systems) | Nov 8, 2020 12:49:32 AM

<https://cta-redirect.hubspot.com/cta/redirect/7904435/d92d08e3-41a3-4810-b5a4-557c7e4a6226>

The Dual-Tone Multifrequency (DTMF) is a telephone signaling system used to route telephone calls to appropriate operators that is supported by the ITSP. DTMF uses two frequency tones placed into the audible speech band of a telephone channel to transmit signaling information in analog lines.

<https://cta-redirect.hubspot.com/cta/redirect/7904435/96a66d6d-976c-4b14-b62c-7bf304355ecd>

[View full post](https://blog.revation.com/top-contact-center-terminology-and-metrics-list/dual-tone-multifrequency-dtmf)

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