The information system of online teaching services with geo-location determination is a system that brings together and arranging meetings between private tutors and people looking for private tutors through Android application supported with geo-location. People can go looking for tutors of related subject for specific time of meeting and location, and then the system will search tutors with matched time of availability within nearest location radius. In addition, students can organize or plan a learning meeting session with the teacher through the application. This information system is a client-server based where the built application consists of Android applications running on the client environment and web applications running on the server environment. Mobile/client applications are used by end-users to search and organize learning session. Web applications serves as web services and interfaces for administrator to manage master data, view user and transaction data, print reports, and respond to complaints from end-users. The programming language used in building this information system is the Java programming language for mobile applications and PHP for web applications and web services. And using MySQL as the database.

TCP\IP protocol can be connected to various computer data networks in the world. This protocol increasingly exists and is needed so that many parties develop it to vote through this protocol. Voice Over Internet Protocol technology is the answer to that desire. This technology is able to convert analog voice (human voice) into data packets then through public internet data networks and private intranet data packets are passed, so that communication can occur. With VoIP communication costs can be reduced so that it can reduce investment costs and conversations (cost saving) or even up to 100% free. VoIP implementation can be done by designing a wireless VoIP network (cable) using 3CXSystemPhone software as a PBX. In this scientific work the software used is 3CXSystemPhone 11.0, where SIP is a VoIP server which is a freeware software, in its application only requires one PC server and several PC clients (2 for example) that are connected to each other