[Home](./index.md) > [sip.js](./sip.js.md) > [IncomingInviteRequest](./sip.js.incominginviterequest.md) > [progress](./sip.js.incominginviterequest.progress.md) ## IncomingInviteRequest.progress() method Send a 1xx provisional response to this request. Defaults to 180. Excludes 100. Signature: ```typescript progress(options?: ResponseOptions): OutgoingResponseWithSession; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | ResponseOptions | Response options bucket. | Returns: `OutgoingResponseWithSession` Outgoing response and an early Session.