inbound_voicemail_callbacks_unavailable
The number cannot be switched to inbound voicemail because this deployment lacks its signed callback/import plane: credential vault, stable public origin, private recording store, and enabled importer. It neither publishes a speculative recording route nor accepts its callbacks.
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_voicemail_callbacks_unavailable",
"title": "…",
"status": 503,
"detail": "…",
"instance": "/v1/…"
}