Techniques for a mixed audio conference are described. Specifically, the protrusion is formed so as to extend toward the center of a virtual circle formed by approximating the shape of a cross section of the open pore to a circular shape. In another embodiment, the reliability of a C4 ball is enhanced by employing a metal pad structure having a set of integrated metal vias that are segmented and distributed to facilitate uniform current density distribution within the C4 ball. Further, companies can receive consumer information in a format that is easily accessible by any portion, affiliate, subsidiary, or related entity of the company, no matter what software system is running.