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 an open source software that was developed and is 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 (AGPL). Read more: http://en.wikipedia.org/wiki/OpenBTS
OpenBTS.org - http://openbts.org/
Gnuradio Wiki Subspace
http://gnuradio.org/redmine/projects/gnuradio/wiki/OpenBTS
OpenBTS on Raspberry PI
http://www.raspberrypi.org/phpBB3/viewtopic.php?t=36400&p=396624
OpenBTS on Sourceforge, developers official hompage: http://openbts.sourceforge.net/
Phones at Burning Man: Can you hear me now?
http://news.cnet.com/8301-27080_3-10348913-245.html
OpenBSC
OpenBSC is a project aiming to create a Free Software,
(A)GPL-licensed software implementations for the GSM/3GPP protocol
stacks and elements.
This is a project aiming to create a Free Software, (A)GPL-licensed
software implementations for the GSM/3GPP protocol stacks and elements.
We have started with an A-bis (plus BSC/MSC/HLR) implementation for
experimentation and research purpose, but have since moved way beyond
that.
What this means: OpenBSC is not just a standard BSC, but a GSM network in a box software, implementing the minimal necessary parts to build a small, self-contained GSM network.
OpenBSC includes functionality normally performed by the following
components of a GSM network: BSC (Base Station Controller), MSC (Mobile
Switching Center), HLR (Home Location Register), AuC (Authentication
Center), VLR (Visitor Location Register), EIR (Equipment Identity
Register).
In addition, the Osmocom project also develops and maintains the osmo-sgsn and OpenGGSN programs for adding GPRS/EDGE capabilities.
Read more: http://openbsc.osmocom.org/trac/
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