Recently, mobile devices have functions that allow them to be used as tools for obtaining information from cell-phone websites. To support universities in Japan by providing communication between those universities and their students in classes or anywhere on campus, the National Institute of Multimedia Education, Japan has developed an online mobile phone campus information system called K-tai Campus. This development was conducted under our policy of providing system functions as an application service provider and that of providing open source systems. In this paper, we describe the design and functions of K-tai Campus, how they provide ease of operation, and we discuss the proper means of connecting both PCs and PC-websites. This paper also focuses on the communication functions provided for teachers and students to further support education.