Voice AI agents are transforming customer service, sales, and support. But before an AI can talk to a caller, you need the voice infrastructure layer — a way to receive inbound phone calls, control the call flow, and respond programmatically. Without this foundation, your AI model has no way to pick up the phone.
Telnyx Call Control gives you this through webhooks. When someone calls your Telnyx number, your application receives events in real time and issues commands back — answer, speak, gather input, transfer, or hang up. This is the foundation every voice AI agent runs on.
What Is Call Control?
Telnyx Call Control is a webhook-driven API for programmable voice. Instead of static IVR menus, your application receives HTTP events for every call state change and responds with commands.
The event loop works like this: Telnyx sends a webhook to your application, your app processes the event, your app issues a Call Control command, and Telnyx sends the next event when that command completes. This cycle repeats for the life of the call.
