NYSE: IDT
Products

Discover how our products can revolutionize the way you communicate and collaborate.

Voice

Explore our advanced voice solutions designed to optimize your communication workflows.

Diverse range of DID number solutions designed to enhance your communication capabilities.

Experience unparalleled communication efficiency with our advanced SIP Trunking Solutions.

Cutting-edge technology to proactively detect and neutralize spam flags on your DID Numbers.

Messaging

Wherever your audience is, our platform ensures seamless messaging across diverse channels.

Build customer journeys by fostering interactive conversations, all within the framework of your app. 

Connect with your audience in a simple and effective way through our cutting-edge SMS platform. 

BYOC

Harness the power of IDT as your chosen carrier while leveraging your platform’s advanced features and services.

Integrate Twilio with our robust carrier routing platform to achieve unparalleled Voice termination system.

Experience reliable and high-quality communication services while leveraging the advanced capabilities of Genesys. 

Integrate IDT with the collaborative strength of MS Teams, unlocking efficient and feature-rich communication. 

Experience the power of our carrier network seamlessly connected to Plivo through our cutting-edge BYOC solution. 

Tools

Experience the power of our online voice tools, designed to simplify communication management. 

Ensure the authenticity and integrity of outbound calls with our STIR/SHAKEN Verification Check tool. 

User-friendly tool to verify the reputation of your business number, ensuring that it remains trusted. 

Compare and gain insights into outbound call expenses, optimize budget, and make informed decisions. 

Easily estimate and compare the costs associated with different DID numbers providers. 

Compare inbound VoIP rates among top CPaaS providers and optimize your inbound call costs. 

Generate custom SMS templates. 

Learn

Empower yourself with the resources you need to thrive in the dynamic landscape of communication.

Articles covering a wide range of topics.

Get answers to common queries.

Find instructions to make the most of our products.

Discover telecom insights and trends.

Find definitions of popular telecom terms.

Explore how our solutions have helped businesses.

Latest telecom trends, innovations, and market insights.

Company

A global telecom partner built to meet your needs. 

Discover the story behind our commitment to delivering innovative solutions to connect people and businesses worldwide. 

Learn about our robust network infrastructure that spans across the globe, ensuring reliable and secure connectivity. 

Got a question, feedback, or need assistance? Our dedicated team is here to help!

Find partners or sign up for partnership programs.

NYSE: IDT
LEARN

DTMF Code

In this article

Short for Dual-tone Multi-frequency Code, it is a response code generated when an end-user presses the numbers on a mobile or landline phone’s keypad.

Each number from 0 to 9 is uniquely identified with a DTMF code that can be received and interpreted on the receiver side. DTMF code signaling enables reception of information from the end user e.g. PIN codes during a voice call.

How are DTMF codes used in the telecom industry? 

Today’s mobile telephones use a digital process for standard calling and messaging, so DTMF codes are not used when connecting to the mobile network base station. However, they do support DTMF codes for a number of important use cases:

  • Entering pin codes as part of 2FA or 3FA authentication solutions
  • Entering credit card details over the phone
  • Navigating automated telephone menu systems
  • Integrations with older telephone systems
Share this article

Meet our wholesale voice routing

Fulfill all your voice calling needs with our category leading wholesale A-Z Voice Termination.
Try IDT Express for a $25 Credit

Get $25 Free Trial Credit

You could be interested in

Learn

Binary SMS Messages

Binary SMS messages are used to send data, usually rich content or small files, in...
Learn

Access Token

An access token is a digital credential that is used to authorize access to a...
Learn

E.164

E.164 is an international standard public telecommunication numbering plan that defines the worldwide public switch...