CDG is a leading telecommunications solutions source with over 30-years experience in consumer and carrier access billing, service provisioning, customer care and operational support systems.     <more about CDG>

CDG is a leading telecommunications solutions source with 30-years experience in consumer and carrier access billing, service provisioning, customer care, and operational support systems.Established in 1970 as a department within the Bank of Illinois, the organization initially devoted itself to two primary functions:...     <more about Communications Data Group, Inc.>