---
title: "E21084 — VoiceEmergencyCallbackRouteRequired"
description: "Emergency calling requires a browser ring group or an inbound-enabled SIP trunk for callbacks."
canonical: "https://bird.com/docs/api/errors/E21084"
---

# E21084 — VoiceEmergencyCallbackRouteRequired

Emergency calling requires a browser ring group or an inbound-enabled SIP trunk for callbacks.

- **HTTP status**: `412`
- **Type**: `precondition_error`
- **Name**: `VoiceEmergencyCallbackRouteRequired`

## What to do

Configure the number's inbound route to use a browser ring group or an inbound-enabled SIP trunk. If the number follows the workspace default, you can change that default instead. If inbound calling is unavailable for the number, contact support.

## Related

- [E21xxx — Voice & SIP trunking](/docs/api/errors/E21xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)