JB, I'm happy for you that you were able to do this. I would strongly suggest that you stop taking his phone calls now. I think that would be better for you and your brother both. He needs to deal with his regrets for himself and you need to be out of reach for him.
I'm not saying you should be afraid, I just think that now that you have reclaimed your personal power you should do all you can to make sure it stays that way and that he doesn't have any more opportunity to make you feel victimized in any way.
That's just my feeling though; I don't know much at all about your brother or the situation, but, just generally speaking, it seems like it would be a better choice, even if he seems remorseful about his abuse to not even allow him to get his foot in the door so to speak and harass you again or try to pressure you to forgive him.