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Create an outbound call with POST /v1/calls/. For an explicit BYOC route, provide a trunk_id:
The request can also include call variables, privacy, DTMF mode, codec ordering, and media-encryption policy. Leamout resolves the public request to a concrete carrier connection, trunk, and trunk endpoint. The returned call records those route IDs so the selected path remains auditable. A successful create returns HTTP 201. The call response includes fields such as id, direction, state, media_state, from, to, sip_call_id, route attribution, and timestamps. The call state returned by the create operation reflects the state reached by the communications runtime before the API response is produced.