On-site e-communication is based on CDMA mobile communication network of China Telecom, and provides standardized on-site management services based on location information for small and medium-sized enterprise customers by using various positioning technologies such as GpsOne, GPS and base station positioning. Specially designed for enterprise field personnel, it is convenient for field personnel to carry out various tasks with the help of mobile informatization, so that enterprise managers can effectively manage field personnel and improve the efficiency of field work scheduling. Suitable for export, external repair, external delivery, external inspection and other industries, which can make on-site work more effective and enterprise management more convenient.