Doing telemetry with the pixhawk without the 3DR radios

As far I understand you can use Copter (, it is possible to connect my computer directly by a serial port to the Pixhawk telemetry ports to do the same?

I know this sounds weird, what I want to do is use a serial data link such as this ( to do telemetry.

Where I can find more information about the way Copter communicates with the Pixhawk via the telemetry ports?

I am a PIXHAWK beginner and learning about it .

This URL talking how to connect computer serial port to the PIXHAWK telemetry port / serial port.

I think it is similar to connect two computers by RS232 serial interface.