Entuity Network Monitoring integration with TSIM can be achieved through the BMC Impact Integration Web Service (IIWS) component
The IIWS component is included in the TSIM Core components installation package available on the BMC EPD website.
e.g below screen shot shows directory structure of 11.3.01 core components installer

To install the IIWS, refer to the below mentioned documentation:
https://docs.bmc.com/docs/TSOperations/113/installing-bmc-impact-integration-web-services-server-843620913.html