Connecting Fona to Teensy++ 2.0

Hey there,
Long time user, first time poster! I have a question. I am using a Teensy++ 2.0 on my project and want to connect a Fona 3G/GSM+GPS to it. Normally, on a UNO, the order is as follows:

RX -> digital 2
TX -> digital 3
RST -> digital 4

For the Teensy, what would that translate to?

Thank you so much! I appreciate your help