It was the cable's problem - it needed to be a 25-pin to 9-pin serial modem cable. Once changed that, every thing just went through.

Using TelCo connection, didn't need the viking unit, and used the cable with RJ11 on one end and other end with four clips connected to Aux power and phone tip and ring in the panel.

It needed the installer code once I initialized the connection. Pressed XXXX#1 to the keypad then it was connected, where XXXX is the installer code.

I was able to upload info from the panel, haven't downloaded back to the panel yet.

Thanks all your supports!