​

Voice

​

Make an Outbound Call

curl -X POST https://orbit-api.devotel.io/api/v1/voice/calls \
  -H "X-API-Key: dv_live_sk_..." \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+14155552671",
    "from": "+18005551234",
    "webhook_url": "https://yourapp.com/webhooks/voice",
    "tts": {
      "text": "Hello! This is a call from Orbit.",
      "voice": "alloy"
    }
  }'

​

Connect to an AI Voice Agent

curl -X POST https://orbit-api.devotel.io/api/v1/voice/calls \
  -H "X-API-Key: dv_live_sk_..." \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+14155552671",
    "from": "+18005551234",
    "agent_id": "agent_support_bot",
    "agent_config": {
      "greeting": "Hi, thanks for calling Acme support. How can I help?",
      "language": "en-US"
    }
  }'

​

Features

• Outbound calls — initiate calls programmatically to any phone number
• Inbound routing — route incoming calls to webhooks, agents, or SIP endpoints
• SIP trunking — connect your existing PBX infrastructure via SIP
• AI voice agents — deploy conversational AI agents powered by LangGraph
• Speech-to-text — real-time transcription via Deepgram Nova-3
• Text-to-speech — natural voice synthesis via Cartesia Sonic Turbo (40ms TTFA)
• Call recording — automatic or on-demand recording with secure storage
• DTMF input — collect keypad input for IVR menus
• Call transfer — warm and cold transfers to other numbers or agents
• Conferencing — multi-party calls with up to 50 participants

​

TTS Providers

​

Call Status Flow

​

Webhook Events