Missouri 314 421 3550 Illinois 618 452 3550

CTS Products

CTS Products 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 is here to support you for any technical difficulties you may encounter. At your convenience, we also maintain and install the following phone systems ESI, Partner, Merlin Legend, Nortel, Norstar and more.

Read more

Services and Maintenance

Services and Maintenance CTS has been delivering excellent business phone system maintenance and installations in St Louis area and Illinois since 1974. We have been effectively providing onsite and remote work, adds and changes from administration. 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.

Read more

Contact Us

Contact Us Have a question about your current system or interested in a new business phone system? Have a phone system already and need phone system maintenance? Please don't hesitate to contact us. Even if you have a simple question, Commercial Telephone System's highly trained staff is here to answer any questions you may have.

Click Here