Abstract
SMAN 1 Teladan Yogyakarta is one of International School in Yogyakarta. As an International school, SMAN 1 Teladan Yogyakarta doing a lot of telephone communication using either local or international. But the facts show that the phone rates in Indonesia is still relatively expensive, this would make a special consideration, since communication is a basic requirement for life. VoIP is one solution to create an alternative communications network which certainly cheaper than a fixed phone or GSM. This is because the VoIP network using the Internet as a medium for communication. The more affordable cost of Internet connection, then the use of VoIP will become increasingly easy. This situation is also supported by the mobile phone application developers, which are now widely free application for VoIP communications via cellular telephone. Results from research conducted by the availability of a VoIP server at SMAN 1 Teladan Yogyakarta, where the server is now available as a cheaper alternative communication. It can be used by teachers to make communication.
Keywords: VoIP as a cheaper alternative communications, build a VoIPbased telephone
Pendahuluan
Komunikasi merupakan kebutuhan pokok bagi setiap orang, dengan adanya komunikasi yang lancar, maka pertukaran informasi juga akan menjadi lancar. Dengan adanya jaringan telepon PSTN (Public Switched Telephone Network), saat ini komunikasi menjadi lebih lancar. Alternatif lain dari PSTN adalah dikembangkannya Global System for Mobile Communications atau biasa dikenal dengan istilah GSM. GSM adalah sebuah teknologi komunikasi selular yang bersifat digital. Teknologi GSM banyak diterapkan pada komunikasi bergerak, khususnya telepon genggam. Kemudahan teknologi GSM sudah banyak dirasakan oleh seluruh lapisan masyarakat.
Peneliti: Maryono
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