Voice

Call Control

Build a custom calling experience with the global carrier thousands of developers rely on.

Already a Telnyx user? Sign In

Connect and control your calls globally with custom voice applications

Telnyx Call Control let's you make, manage and route calls globally to any device — phone, app or browser. Our Voice API gives you the flexibility to build calling experiences into your own applications that are as sophisticated and responsive as you need them to be.

Use Cases For Developers Features Why Telnyx?

Use Cases

Discover how businesses are using Telnyx

Call Tracking
Attribute calls to marketing channels to manage campaign ROI and drive conversion.
UCaaS
Make, receive, route, manage, record and conference calls, all in one place.
Cloud IVR
Build a scalable IVR to create a better customer experience and reduce your operational costs.
Contact Center
Make and receive calls within your CRM application, and keep all your customer conversations in one place.

For Developers

Putting developers in control

Integrate your voice applications with speed and flexibility using your preferred programming language.Our API gets you to market faster, with granular control over call flows.Currently using an XML-based voice API? Get in touch with our team of experts to migrate to a more flexible solution.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
// Gather DTMF (key presses)

curl -X POST \
  --header "Content-Type: application/json" \
  --header "Accept: application/json" \
  --user API_KEY:SECRET \
  --data '{
    "audio_url": "http://www.example.com/audio/greeting.mp3",
    "min": 1,
    "max": 8,
    "tries": 3,
    "timeout": 10,
    "terminating_digit": "#",
    "valid_digits": "12345",
    "inter_digit_timeout": 10,
    "invalid_audio_url": "http://www.example.com/audio/invalid.mp3"
  }' \
  "https://api.telnyx.com/calls/{call_control_id}/actions/gather"