ENGLEWOOD, Colo.--(BUSINESS WIRE)--CSG Systems International, Inc. (NASDAQ: CSGS), a global provider of interactive transaction-driven solutions and services, invites you to participate in a conference call on Wednesday, August 5, 2015, at 5:00 p.m. Eastern Time to discuss the company's second quarter 2015 earnings results. The one-hour conference call will feature Peter Kalan, CSG Chief Executive Officer, and Randy Wiese, CSG Chief Financial Officer. To reach the conference, dial 1-800-723-675