[Guilherme]

I got it! It´s working know.

We have no AC adapter to our OI, so the used voltage was somehow making the communication between the Internal Radio and the RS-422 Data Modem fail.

I made an Y cable to turn on both EduRC at the same time.

I made some modifications to the code, just to test. But the code available to download works perfectly!

Thanks all for your help! You´re great!