About Us

Commercial Technology Solutions (aka Commercial Telephone Systems) is an Avaya Business Partner which means we are authorized to sell you quality phone equipment, provide phone system maintenance and warranties with your purchase. Our Avaya-certified technicians and highly supportive staff are here to support you with any technical difficulties you may encounter. At your convenience, we also maintain and install the following phone systems; Avaya, ESI, Partner, Merlin Legend, Nortel, Norstar, and more.

Cts Products

CTS has been delivering excellent networking and business phone system maintenance and installations in the St Louis area and Illinois since 1974. We have been effectively providing great customer satisfaction by either working remotely or on location. Whether your service needs wiring, installation relocation, programming, or training, CTS’s highly-qualified technicians will ensure that the job is completed to your satisfaction.


Services and Maintenance

Need expert support for your current business phone system or network? Looking to upgrade to a new one? Trust Commercial Technology Solutions (CTS) for all your phone system needs. Our team of highly trained professionals are available to assist with any questions or concerns you may have, whether it's a simple inquiry or maintenance for your existing phone system. Don't hesitate to reach out to us, we're here to help!


Since 1974, Commercial Technology Solutions (CTS) has been delivering superior communication solutions and networking services to businesses across St. Louis Metro area and Illinois. Our relentless focus on customer satisfaction has earned us a reputation for excellence, as we’ve met the unique needs of each and every one of our thousands of satisfied customers. At CTS, service is always our top priority, which is why we promptly respond to both major and minor issues, with most being resolved on the same day. Our highly qualified and friendly technicians are dedicated to providing you with the prompt, reliable service you deserve. Choose CTS as your trusted communications source.


At Commercial Technology Solutions (CTS), we’re committed to delivering customized communication solutions that meet the unique needs of your business. As an independent dealer of data and telecom equipment, we have the flexibility to offer the best options for your specific requirements. Our sales team will take the time to listen to your needs and recommend a tailored solution that keeps your business on the cutting edge of technology. With the ability to implement smaller solutions within days and larger projects within several weeks, you can count on CTS to keep your business connected and ahead of the competition.


We have been a reliable provider of phone system maintenance and networking services in the St Louis area and Illinois. Our unwavering focus on customer satisfaction has made us a trusted name in the communications industry. By establishing a relationship with CTS, you can enjoy peace of mind knowing that our exceptional services and technical support will be available and accommodating every time you need them. Don’t settle for less, choose CTS for unparalleled phone system maintenance and support.

Business Partners and Sponsors