The executable runs silently in the background. It uses Windows API calls to monitor serial ports (COM1, COM2, etc.). When a legacy application (like a fax software or dial-up networking) attempts to access the modem, commwatch.exe mediates the handshake. It ensures the modem is powered on, sets the correct baud rate, and passes the data stream.

: It is typically a standalone executable that does not require a complex installation process. AI responses may include mistakes. Learn more VLHDMIEXT416 User Manual - AV-Connection