CSI Voice & Data Communication Solutions"Your Complete One Stop Telecom Partner" The Intelligent, Versatile, & Affordable Communication Solution for Small/Medium Businesses
Learn More
Business Telephone & Voice Processing Systems"Authorized Distibutor of ESI eSIP Evolution Series Communication Servers & CSI VOIP CLOUD" Flexible Communication System Designed to Offer Anytime, Anywhere Communication
Learn More
Phone Line & Internet Service Consulting"Independent & Unbiased Representative of Most Major Business Telephone & Internet Service Providers" No Cost Analysis & Audit of Current Voice & Data Network Services
Learn More
VOIP Equipment & Service Solutions"When Business is on the Line, We Understand the Importance of Your Communications" Proven & Reliable Business Solutions Utilizing the Flexibility of VOIP Technology. Questions About VOIP?
Learn More

Who is CSI?

CSI of St. Louis, Inc. has been serving the St. Louis Area for over 45 years. We are determined to be the leader in the business communication solutions market place, and to show our customers just how important they are to us.

The owner Rick Beck and the team at CSI have a commitment to service and quality which has allowed for them to have experienced tremendous growth in the St. Louis region, which today exceeds over 4,000 customers.

CSI Telecommunications, Inc. provides telephone systems, voice processing systems, surveillance systems, voice and data networks, consultative services for business telephone/internet service with the expertise to allow these technologies to improve your company’s working environment.  The entire CSI team is critically aware of the importance that communications play in your business and your ability to produce a high level of service to your own customers. 

Voted most innovative companies by St. Louis Small Business Monthly - September 2021




Carrier Services Woman

Are you interested in Auto Attendant, Direct Dial Number, Voicemail to Email, Voicemail to Email Transcription (Text), Mobile App, Desktop App, Web Portal Admin Tools, Call Recording, Call Activity Reporting and E Fax?  These are all included in CSI's VoIP Cloud Solution.

Learn More

Telecommunications Services

Are you looking for reliable service/repair company for your current telephone equipment?
We have a team of experienced technicians that are capable of service & repair for most major brands of telephone systems. Click Here to Request a Service Technician or Call Us Today at 636-534-6600.

Learn More

Contact Us