PROGRAMMABLE VOICE
Voice API
Build the next generation of applications on the next-gen cloud platform
Crystal clear calls
With Tier-1 interconnects at major global internet hubs, your calls get through the first time, every time. High-speed connections mean reduced latency and jitter as calls avoid the public internet.
Goodbye long awkward pauses
Using an edge-stack approach, we leverage multiple global points of presence to process data in the location nearest your application—for consistently low latency levels.
Calling without limits
Embed PSTN, SIP, or VoIP calling into any phone, browser, SIP domain or mobile application. Get instant local, national and toll-free numbers, and scale on demand with unlimited capacity.
FEATURES
Powerful features out of the box.
Conference Calls
Connect people and teams across the globe with feature-rich audio conferencing.
Media Streaming
Access the raw audio stream of calls to integrate advanced AI/ML capabilities.
Text-to-Speech
Speak dynamic text in 29 languages and accents, powered by Amazon Polly.
Answering Detection
Premium AMD uses advanced speech recognition technology for exceptional accuracy.
Agent Coaching
Speak privately on a call to provide feedback and guidance to an agent.
Speech to Text
Real-time transcription on a live call, activated via one API command.
Call Recording
Integrate dual-channel recordings to capture all or part of calls.
Smart IVR
Build a multi-level IVR to intelligently route your call flows.
FEB 03, 2021
“I have used other VoIP providers in the past, but have migrated all primary lines to NEL Telecom due to their outstanding reliability.”
Build exactly what you need for your use-case.
Embed feature-rich call conferencing into your application to connect global teams and enable work from home at scale.
Build an advanced tracking and analytics platform to accurately attribute calls to marketing channels, measure ROI and increase conversion.
Build Interactive Voice Response (IVR) systems that capture both touch-tone (DTMF) and voice inputs from customers interacting with your application.
Automate, optimize and scale your contact center call flows for faster resolutions and a better customer experience (CX).
Connect sales reps with leads instantly using automated SMS and voice alerts to increase productivity and conversion.
Switch on advanced AI features with simple API commands, or fork media in real-time to feed advanced AI models.
All your business needs, in one API
| NEL Telecom | Competitors |
|---|---|
| Private network | Public internet |
| Our private global IP network was purpose-built for real-time communications, so your calls are crystal clear and secure, with low latency. | The internet wasn’t built for real-time communications, and it shows—with high latency, packet loss, and poor security. |
| Fully owned | Resellers |
| We control our infrastructure, so we control routing, quality and traffic for high-quality calls and low post-dial delay. | Using other providers’ servers and middlemen for routing and telephony leads to persistent routing and quality issues. |
| Sub-second response time | 3+ second response times |
| We use an edge-stack approach to route your data via the closest server to your application to deliver market-leading latency. | Greater reliance on the public internet and less control over core communications functionality significantly increases latency. |
Frequently Asked Questions
Most frequent questions and answers
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).
To get started, contact us to 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.
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.
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.
You can find pricing for Call Control on our pricing page. NEL Telecom 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.
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.
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.
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 NEL Telecom’s WebRTC solution.