VSPE can be started as a service using one of App-to-service like programs. NSSM Service Manager tool can be used. You can download it from https://www.nssm.cc/ or from Fax Voip T.38 Modem website.
1. Download and install NSSM tool.
2. Create VSPE configuration and save it by clicking Save as... command on the File menu. Remember config file location (for example it can be c:\config.vspe).
3. Start cmd.exe with Run as Administrator option. Go to NSSM folder and run nssm install VSPE_Service.
4. Specify path to VSPEmulator.exe and configuration file and click <Install service> button.
5. If successful, you will see the Service successfully installed! message.
6. Run service using net start VSPE_Service command (use Run as Administrator option) or reboot your computer.