Presently the project of the E MAN s construction is in great mass fervor after the project of the School Network s construction.

According to the advanced mode of VoIP technology,the article analyzes the advantages and disadvantages of VoIP system when it applies to school network,and brings forward the plan to link education MAN.

This paper introduces network topology and function of education MAN(Metropolitan Area Network),gives a method to design and implement IMS(Information Management System)based on MAN and also puts forward a safe stratagem based on RBAC(Role-based Access Control).

The current education MAN system is mainly a three-layered structure based on the VPN tech- nology;it is usually built on the rented physical circuit from the ISP as China Telecom.

The Design and Implementation of the EduMAN Based on VPN Technology;

Based on the study and practice of Taian s eduMAN(educationMAN), this project introduces a new mode for eduMAN.

This paper discusses the basic theories of information security engineering briefly, describes the flow chart of information security engineering, analyzes potential safety hazard that the network faces, provides the network safe solution in the educational MAN in terms of safety engineering,.

Based on the study of the basic concept of information resources sharing of educational Metropolitan Area Network(MAN),this paper discusses the model of information resources sharing of educational MAN,including the star type sharing model,tree type sharing model,ring type sharing model and net type sharing model.

This article introduces the successful experi-ence how to carry out constructional procedure scheme of educational city area network.

Nowadays with the rapid development of informationization in education, the educational metropolitan area networks (EMAN) have played an important role in improving the administration of education management and the quality of education.