Since 1985, Communications Technology Associates (CTA) has been providing telecommunications services. The firm offers products from manufacturers, such as VERTICAL, ADTRAN, NORTEL NETWORKS and CISCO. Communications Technology Associates provides a wide range of products/services, such as on-site consulting, VOIP (voice over internet protocol)/PBX (private branch exchange) systems, voicemail systems, routers, switches, PCs (personal computers), servers along with service and support for existing equipment. Located in Wichita, Kansas, it caters to the needs of over 10,000 customer located across the United States.