inbound_voice_number_not_eligible
A non-null inbound route requires an active, assigned, carrier-confirmed voice number on this tenant's verified BYO Twilio account. Clear the route with inbound_agent_id: null to remove stale configuration after release or verification loss.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/inbound_voice_number_not_eligible",
"title": "…",
"status": 409,
"detail": "…",
"instance": "/v1/…"
}