Virtual Serial Ports Our Virtual Serial Port Drivers for Windows and Linux allow you to transparently access your device server's serial port as if it was a real COM port of your PC. Your "serial" PC software won't notice the cheat.     Direct TCP and UDP links All Atil serial-over-IP devices support standard TCP/IP and UDP/IP protocols. Open a socket and exchange data with the serial port of your device server directly. It's that simple.     Device-to-device links Atil device servers can talk to each other directly, using standard TCP/IP and UDP/IP protocols. No PC necessary.