Action Communication Technology, Inc. has built its reputation as the number-one trusted source for Nortel Norstar and ESI by providing client-centered service from start to finish. But more importantly Action is authorized by Nortel and ESI-Estech to sell and service the latest telephony products and services available with the full backing of the manufacturer. With over 100 years of combined experience. Our installers, engineers and project managers are, or have been Nortel and ESI certified technicians. Each has been trained, tested and authorized by the system manufacturer in telephone system design, installation, programming, training, troubleshooting, and system maintenance and repair