In this paper, the authors explain about the \"Mobile wireless LAN\". This paper is to design and implement a telephony program that uses Wi-Fi in LAN as means of communication between mobile phones. The technology for creating mobile campus network via Wi-Fi is discussed. The WLAN is a Wireless Local Area Network links two or more devices over a short distance using a wireless distribution method, usually providing a connection through an access point for Internet access. The problem is that the currently such system does not exist for mobile phones.