Expert Systems IVR (Asia) Co. Ltd. (ESi) has been focused on Telecommunication Solutions in Asia-Pacific since early 90s. We provide the best unified communications platforms that helps the enterprise to communicate and manage their services effectively and efficiently. Customer success is our goal. ESi committed to empower communication environment, deliver high quality services and reliable system for customers. With over 20 years of experience in the telecommunication industry, ESi is the expert of IP communications and video platform which continuously providing innovative unified communications solutions for corporate, enterprises and Telco to meet their ever changing business needs and optimize their resource allocation for current services and future plans. We are specializing in developing Messaging, Voice, Video Telephony Application, VoIP and Unified Communications solutions for worldwide enterprises. Headquartered in Hong Kong and owned subsidiary in Asia-Pacific, ESi is proud to provide international service with our global alliance. Our professional teammates come with certified professionals, consultants, and engineers, giving us unique insight into the global telecommunication market.