[Home](./index.md) > [sip.js](./sip.js.md) > [OutgoingRequest](./sip.js.outgoingrequest.md) > [cancel](./sip.js.outgoingrequest.cancel.md) ## OutgoingRequest.cancel() method Sends a CANCEL message targeting this request to the UAS. Signature: ```typescript cancel(reason?: string, options?: RequestOptions): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | reason | string | Reason for canceling request. | | options | RequestOptions | Request options bucket. | Returns: `void`