Stay up to date with the latest changes to Synthflow.
Use SIP X-Headers in prompts, actions, and transfers
Synthflow now accepts arbitrary X-* SIP headers on inbound calls. Any custom header your SBC, PBX, or carrier attaches to the SIP INVITE is automatically extracted and made available as a variable throughout the call lifecycle — in prompts, custom actions, and outbound transfer headers.
See the full guide: Use SIP X-Headers in Prompts, Actions & Transfers.