Building AWS Lambda functions for the PSTN Audio service

The topics in this section explain how to build the AWS Lambda functions used by your PSTN Audio service.

Contents

• Understanding telephony events
• Understanding actions
• Telephony events that invoke AWS Lambda functions
• Responding to invocations with action lists
• Supported actions for the PSTN Audio service
• Using SIP headers
• Using call detail records
• Timeouts and retries
• Debugging and troubleshooting
• VoiceFocus
• PSTN audio service glossary