[Home](./index.md) > [sip.js](./sip.js.md) > [OutgoingRequestDelegate](./sip.js.outgoingrequestdelegate.md) > [onProgress](./sip.js.outgoingrequestdelegate.onprogress.md) ## OutgoingRequestDelegate.onProgress() method Received a 1xx provisional response to this request. Excluding 100 responses. Signature: ```typescript onProgress?(response: IncomingResponse): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | response | IncomingResponse | Incoming response. | Returns: `void`