Founded in 1983 and privately held, ATI has been providing business phone communication solutions throughout the Chicago city metropolitan area, Northern Illinois and nationally.

Together with an associate office in Pittsburgh, PA and a trusted network of national recognized partners, we support more than 10,000 phone system customers nation-wide.

From 10 to 10,000 phones, our installed customer base includes private, not-for-profit, government, municipalities and Fortune 500 businesses.

Advanced Telecommunications of Illinois has partnered with the top system manufacturers to offer our customers the diversity of industry leading VOIP telephony based communication solutions and complimentary phone system products. ATI's suite of product offerings will always stay at the forefront of industry technology. We provide cradle to grave support for our clients through scalable platforms with streamlined migration paths thus providing total investment protection for the life of your IP communications solution.