About D.S.I. Founded by a technician, Dillon Systems, Inc. is an authorized Vodavi dealer located in the Raleigh, Durham N.C. area. Our driving force begins with a strong product line that enables us to provide cutting edge technology to any size business no matter how simple or complex their phone system needs may be. We follow-up with a committment to service that product with a factory trained team of professionals!  Get in touch with us today! Contact Us