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 maintenance? Please don’t hesitate to contact us. Even if you have a simple question, Commercial Telephone Systems is here for your needs!
Or if you are looking for a Quick Quote from CTS click here instead.
Toll Free throughout the United States (888) 452 – 3550

St. Louis Metro area including Southern Illinois
Commercial Technology Solutions
LLC dba Commercial Telephone Systems.
2133 Johnson Rd. Ste. 105
Granite City, IL 62040

Illinois: (618) 452-3550
Missouri: (314) 421-3550
Fax #: (618) 452-3551

Springfield, Decatur and Northern Illinois
Commercial Technology Solutions
LLC dba Commercial Telephone Systems.
2305 E Grand View
Springfield, IL 62702
(217) 717-9738

Chicago, IL: (773) 644-5764

Email

Sales Contact: sales@ctsphone.com
Service Contact: service@ctsphone.com
Technical Support contact: techsupport@ctsphone.com

Contact Information