OpenBTS
| Stable release | 4.0
/ March 26, 2014 |
|---|---|
| Repository | |
| Written in | C++ |
| Operating system | Unix-like |
| Type | GSM protocol stack |
| License | GNU Affero General Public License |
| Website | OpenBTS |
OpenBTS (Open Base Transceiver Station) is a software-based GSM access point, allowing standard GSM-compatible mobile phones to be used as SIP endpoints in Voice over IP (VoIP) networks. OpenBTS is open-source software developed and maintained by Range Networks. The public release of OpenBTS is notable for being the first free-software implementation of the lower three layers of the industry-standard GSM protocol stack. It is written in C++ and released as free software under the terms of version 3 of the GNU Affero General Public License.