[Home](./index.md) > [sip.js](./sip.js.md) > [IncomingRequest](./sip.js.incomingrequest.md) > [progress](./sip.js.incomingrequest.progress.md) ## IncomingRequest.progress() method Send a 1xx provisional response to this request. Defaults to 180. Excludes 100. Note that per RFC 4320, this method may only be used to respond to INVITE requests. Signature: ```typescript progress(options?: ResponseOptions): OutgoingResponse; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | ResponseOptions | Response options bucket. | Returns: `OutgoingResponse`