Business Telecommunication Systems, Inc.(BTS) started business in 1981 to provide business class telephone systems, paging systems, and voice and data cabling. As the industry changed, so did BTS, and now 38 years later we are now one of the largest communications companies in the Inland Empire offering a complete range of Communication Solutions. We offer a complete line of Premise, Cloud, and Hybrid VOIP Phone Systems, Voice and Data Services, Collaboration Tools, Managed IT Services, Network Design, Voice, Fiver, and Data Cabling, 70v Paging Systems, Video Surveillance Systems (CCTV), Computer Service and Management, Wireless Data Systems, and Internet and Phone Bill Analysis. We are a solutions-oriented company with an award winning service and support team and is dedicated to continuing our 38-year tradition of quality products and a commitment to excellence.