Okay, but it still seems that the visiting section at away games is much larger than the capacity needed to accommodate those on a player/coach pass list.
Take football for example. At Miami, the visiting section is one huge section that extends from the first row to the very top of Yager Stadium. How do I get a ticket that assigns my butt to that section? Those can't all be player/coach passes. The only times I ever see our ticket office selling away game tickets is when we are playing against BCS type programs (UK, Ohio State, Louisville, etc.).
For football - I think this varies on which person is running the ticket office, since it seems to turn over every year or so the past few years.
Anyway, typically all away FB games are available by calling the ticket office (well in advance). I think there's a date, typically 2/3 weeks where I think the unsold tickets are sent back to the away school. At least that's been my experience. They advertise the 'big' game, but most are available.
And I think in more recent seasons, you can buy them online, on the xosn.com site with your account/pw. I don't see any this year for away hoops games though. So I think it really depends on who's running the show.