VoIP Providers & Business Phone Companies in Montgomery, IL

ADC Technologies, the trade name of Accredited Data Centers, Inc., is an Illinois managed IT and technology consulting firm. Its main clients are small and mid-sized organizations. Business telephony is one of several services it offers, alongside IT support, security and physical infrastructure work. Buyers who want one outside partner for both their phones and their wider IT environment will likely find this broad scope the main reason to consider the company.

Phone Systems and VoIP

The firm's phone systems practice covers a wide range of setups. It handles conventional landline installations, Voice over Internet Protocol deployments and hosted cloud telephony, with an emphasis on systems that can scale as a business grows. ADC presents a new phone platform as part of a larger unified communications upgrade, not a stand-alone purchase.

Its regional service pages also list VoIP business telephones next to cloud services, Microsoft 365 and backup and disaster recovery. That suggests voice is usually bundled into a broader managed support arrangement.

Related Services

• IT consulting and managed services
• Business phone systems, including VoIP and cloud-hosted options
• Access control systems and security cameras
• Printing solutions
• Low-voltage cabling
• Cybersecurity
• Website design and search engine optimization

Low-voltage work is especially relevant for phone buyers because it covers the physical cabling that voice and network equipment depend on. That lets one vendor handle both the infrastructure and the system that runs on it. ADC has also installed conference room equipment: one client, a regional economic development group, used the firm to set up a space for professional virtual meetings, including option review, installation and staff training.

Working Style

The company calls itself a strategic adviser that helps clients plan technology around future growth, and it offers anything from a full outsourced IT department to targeted consulting. Client reviews describe a discovery phase in which the team learns how a business operates before recommending changes.

Reviewers also mention fast ticket handling, callbacks within about an hour and replacement plans built to fit the client's budget. Several say they moved to ADC after poor results with previous IT vendors, and some describe the approach as low-pressure rather than sales-driven.

Background

ADC says it has supported clients for more than fifteen years, and some of its pages put that figure closer to two decades. Owner Jeff Corirossi leads the business and is named in many client testimonials, as are other staff members who work directly with clients. The firm's current listed office is in Montgomery, Illinois.

Earlier listings placed it in nearby Sugar Grove, where the local chamber of commerce welcomed it with a ribbon cutting in 2022. It is also a member of the Oswego Area Chamber of Commerce. ADC has pages targeting several Illinois markets, including Evanston, St. Charles, DeKalb, Champaign and Normal.

At the time of review, its homepage showed a five-star Google average across nine reviews. Clients mentioned in those reviews include a plumbing contractor and a medical practice.