As to the Pac-12 Network, only some of the games owned by the Pac-12 go on the Pac-12 networks. The Pac-12 has a contract with ESPN and Fox where most or many of the games controlled by the Pac-12 (in other words, games played in Pac-12 stadiums) are owned by and will be broadcast on an ESPN or Fox channel. The remaining games will be on the Pac-12 networks.
Here's an article reporting the ESPN/Fox deal:
http://www.sfgate.com/sports/article/Pac-12-gets-richest-TV-deal-2373197.php