Osmocom is a family of projects that develop open source mobile communications technology. Within this the OpenBSC project serves as an umbrella for GSM infrastructure software, having developed BSC/”network-in-the-box”, BTS and TRX implementations, among others. The Osmocom GSM stack is a key part of the Fairwaves architecture, we are regular contributors and it is fully supported as part of our solutions. Indeed, the UmTRX hardware platform is also an Osmocom project.