New FCC rules capping the rates of phone calls for interstate calls to and from prisons went into effect recently. Before the rate caps, a 15-minute call could cost as much as $17. Advocates say the cost made it difficult for inmates to stay in touch with family members. The fees collected are typically split between the private telecom companies providing service and the states or municipalities operating the facility. Those companies are appealing, noting that security and other issues make providing service more expensive. We explore the issues in play.