[Home](./index.md) > [sip.js](./sip.js.md) > [Inviter](./sip.js.inviter.md) > [cancel](./sip.js.inviter.cancel.md) ## Inviter.cancel() method Cancels the INVITE request. Signature: ```typescript cancel(options?: InviterCancelOptions): Promise; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | InviterCancelOptions | Options bucket. | Returns: `Promise` ## Remarks Sends a CANCEL request. Resolves once the response sent, otherwise rejects. After sending a CANCEL request the expectation is that a 487 final response will be received for the INVITE. However a 200 final response to the INVITE may nonetheless arrive (it's a race between the CANCEL reaching the UAS before the UAS sends a 200) in which case an ACK & BYE will be sent. The net effect is that this method will terminate the session regardless of the race.