OpenBTS 是从基带收发站（BTS）向上，完全替代传统的 GSM 运营商的网络交换构架。替代传统的传递呼叫到运营商的移动交换中心（MSC)的方法，它是通过 SIP 和 VOIP 传递数据到 Asterisk PBX 的。项目是由 Harving Samra 和 David A. Burgess 启动的。其目的是把边远和发展中地区地区的GSM服务费用减少到每个用户每月在1美元以下。项目的最初开发者涉及执照事宜，在初期的相关工作中官司连连（现已解决），也就是说一些底层的 GSM 代码被重新改写过。-OpenBTS from baseband transceiver stations (BTS) upwards, completely replace the traditional GSM operator' s network switching architecture. Alternative to traditional route the call to the operator' s mobile switching center (MSC) method, which is passed through the SIP and VOIP Asterisk PBX to the data. Project is funded by Harving Samra and David A. Burgess started. Its purpose is to remote and developing regions region' s GSM service fees reduced to $ 1 per user per month or less. Developers involved in the project' s initial license issues related to the work in the initial lawsuit again and again (now resolved), that some of the underlying code has been rewritten over GSM.