Overview | SignalWire

Introduction

A call flow consists of a series of nodes, which represent different actions that can be taken during a call. Each node has a specific purpose, and you can connect nodes together to create a complete calling application.

Starting node

Starting nodes are the first nodes in a call flow and are used to handle incoming calls.

Node	Description
Handle Call	Handles an incoming call. Starting point in the Call Flow

Action

Action nodes perform specific actions during a Call Flow, such as playing audio, answering/hanging up a call, or sending an SMS.

Node	Description
Answer Call	Answers an incoming call.
Hang Up Call	Hangs up the call.
Play Audio or TTS	Plays an audio file or text-to-speech message to the caller.
Send SMS	Sends an SMS message to the caller.

Forwarding

Forwarding nodes transfer the call to another number.

Node	Description
Forward to Phone	Forwards the call to a phone number.

Record

Record nodes record the caller’s/callee’s voice/voicemail.

Node	Description
Start Call Recording	Starts recording the call.
Stop Call Recording	Stops recording the call.
Voicemail Recording	Records a voicemail.

Input

Input nodes collect input or http requests from the caller.

Node	Description
AI Agent	Connects the call to an AI agent.
Gather Input	Collects input from the caller.
Request	Sends an HTTP request.

Decision

Decision nodes make decisions based on the conditions specified.

Node	Description
Conditions	Evaluates conditions and branches the call flow accordingly.
Execute SWML	Executes SWML code.
Set Variables	Switches variables based on conditions.
Unset Variables	Unsets a variable.