Outbound Calling Overview

Outbound calling is the flow where your code initiates a call to a phone number and SIPHON connects that call to your running agent worker.

The outbound flow

1. Run your agent worker (Agent(...).dev() / Agent(...).start()).
2. Place a call from code (Call(...).start()).
3. SIPHON forwards per-call configuration (LLM/STT/TTS + instructions) via metadata.

Learn the pieces

• Outbound Calls
• Outbound Testing
• Outbound Trunks

Provider-specific SIP examples (Twilio, Telnyx, Plivo, Wavix): Provider-specific quickstarts

Agent workers

Outbound calls target a worker by agent_name. Make sure your call uses the same agent_name as your running worker.

See: Agents Overview