[Home](./index.md) > [sip.js](./sip.js.md) > [OutgoingRequestDelegate](./sip.js.outgoingrequestdelegate.md) > [onReject](./sip.js.outgoingrequestdelegate.onreject.md) ## OutgoingRequestDelegate.onReject() method Received a 4xx, 5xx, or 6xx negative final response to this request. Signature: ```typescript onReject?(response: IncomingResponse): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | response | IncomingResponse | Incoming response. | Returns: `void`