Facetime I can contact him but he can't contact me
I have facetime 3.0 (1638) and my brother has 3.0 (2600). I can call him up and it works fine. But he can't call me. The two builds seem different so I can't talk hime through troubleshooting. I have a contacts section but apparently it's accessed differently on his build so I could not figure out how he would access it. I'm in California and he's in Oregon so I can't just walk over there. He has both my email and phone number inputed and when he calls me he says it rings, and it eventually says I'm not answering. I hear or see no indication that he is calling, and my facetime is definitely up and running.
iMac, OS X Mavericks (10.9.3)