Could you please clarify if there is an active use case of telephony input using Direct SIP Trunk? I couldn't find detailed documentation on this topic, only a reference in the vapi graph.
Vapi helps developers build, test, and deploy voice agents at scale. We enable everything in between the raw models and production, including telephony, test suites, and real-time analytics.
Vapi does support telephony inputs using Direct SIP Trunk as part of its broader functionalities to handle various types of phone call transports, including SIP and PSTN. However, the detailed documentation specific to using Direct SIP Trunk is not explicitly covered in the resources available to me. For more specific usage and implementation details, you might need to refer directly to additional Vapi documentation or support (1).
For general information on how phone call transports are handled, you can refer to the available documentation on creating and managing phone calls where telephony inputs like SIP are mentioned (2).