ACC Business was founded on a simple idea: provide small to mid-sized businesses first-rate telecom services with dedicated customer service, all at a competitive price. ACC Business provides all of its customers’ access to the AT&T Network, the largest, most advanced and reliable telecommunications network in the world. The AT&T Global Network is constantly enhanced, upgraded and monitored for excellence, so you’ll have peace of mind knowing that all of your important calls and data will get through.