What is a voice API?
A voice API is a tool that software developers use to make and receive phone calls using an Application Programming Interface (API). A voice API connects internet-based applications to the Public Switched Telephone Network (PSTN).
How do I build with the Telnyx voice API?
To get started, sign up for a Portal account, then follow the 4 remaining steps in our quickstart guide to create an application, buy a number, assign it to your app and create an outbound voice profile. Then, use our SDKs to start building.
Can I record calls with Call Control?
Yes, you can use the Telnyx voice API to record calls using the record_start command. You’ll find code snippets to help you do this quickly and easily in our developer center.
Does Telnyx offer text-to-speech capabilities?
Absolutely. Text-to-speech allows you to convert text to speech and play it back on the call. We leverage Amazon Polly to provide a conversational experience, available across 29 languages and accents. You can find out how to use the speak_text command in our developer center.
How much does Call Control cost?
You can find the latest pricing for Call Control here. Telnyx offers even greater discounts as you scale, or when you’re ready to commit to monthly usage—talk to our sales team about custom pricing.
Can I use XML code with the Telnyx voice API?
You can! We’ve developed a tool called TeXML Translator to make it easy for you to use your XML based applications with the Telnyx voice API. Follow the TeXML setup guide in our developer center to get started.
What use-cases does the Telnyx voice API support?
You can build a range of different applications using the Telnyx voice API—these include call tracking, cloud IVR, contact center and conference calling, to name a few.
What’s the difference between calls made via voice API and WebRTC?
While phone calls made using a voice API can be powered over the internet, they also rely on a VoIP network to be completed. WebRTC calls are solely focused on browser-based communication. Learn more about Telnyx’s WebRTC solution.