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laforge, 12/12/2016 12:18 PM

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h1. Welcome to Osmocom [[OpenBSC]]
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{{>toc}}
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We have started with an A-bis (plus BSC/MSC/HLR) implementation for experimentation and research purpose, but have since moved way beyond that.
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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.
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[[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).
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We have started with the Siemens BS11 microBTS, mainly targetted the ip.access nanoBTS for some years, but has since been extended to support a variety of other [[BTS]] equipment like the Ericsson RBS 2000 family.  Today, most of the users and active developers work not with proprietary BTSs, but with BTSs running our [[OsmoBTS]] software, i.e. either the [[sysmoBTS]] family of hardware or SDR based hardware with [[OsmoTRX:]] like the [[UmTRX:]] or "UmSITE":https://fairwaves.co/wp/products/.
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_We are always looking for [[cellular-infrastructure:HardwareDonations]] of any kind of GSM / 3G related carrier equipment._
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h1. Overview Diagram
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Please see the below overview diagram about common possible configurations of the Osmocom software.
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!osmocom-gsm.png!
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h2. Getting started
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[[UnderstandingOpenBSC]] -- Where to start learning about [[OpenBSC]], what it does, and how.
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h2. [[OpenBSC]] Software
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* Software for running a full minimal GSM Network in a Box:
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** [[OpenBSC]] -- The Free Software project implementing various parts of the GSM network
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*** [[osmo-nitb]] -- A stand-alone gsm-network-in-a-box program implementing minimal subset of BSC, MSC, HLR, AuC and EIR.
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**** [[osmo-nitb_VTY]] -- Reference for the interactive command line and config file
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* Software utilities for BTS configuration, provisioning and the like
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** [[bs11_config]] -- A small tool for configuring the BS-11 using RS232
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** [[ipaccess-find]] -- A small tool to find nanoBTS in your network 
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** [[ipaccess-config]] -- A small tool to set NVRAM configuration of the nanoBTS
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** [[isdnsync]] -- A small tool to use the PSTN as frequency standard
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* Software for running in pure _BSC only_ mode, attaching via A/SCCP to a MSC
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** [[osmo-bsc]] -- [[OpenBSC]] in BSC-only mode
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** [[bsc_msc_ip]] -- A previous utility to connect to a MSC via A over IP
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*** [[OpenBSCWithSCCP]] -- Howto use [[OpenBSC]] with a separate/real MSC
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** [[bsc_mgcp]] -- A stupid [[MediaGatewayControlProtocol]] (MGCP) gateway
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*** [[bsc_mgcp_VTY]] -- Reference for the interactive command line and config file
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* Software for UMA/GAN (Unified Mobile Access)
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** [[osmo-ganc]] -- [[OpenBSC]] in GANC mode
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* Special purpose software for aggregating multiple A or Gb links
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** [[bsc_nat]] -- a BSC NAT/Multiplexer
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*** [[bsc_nat_VTY]] -- Reference for the interactive command line and config file
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*** [[bsc_nat_release]] -- Release testing for the BSC NAT.
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** [[osmo-gbproxy]] -- A proxy/gateway for aggregating multiple Gb links betwen BSS and SGSN
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*** [[osmo-gbproxy_VTY]] -- Reference for the interactive command line and config file
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** [[release-testing|Testing]] -- Comments and what makes sense to test for releases
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* [[OpenBSC]] related [[PortNumbers]] -- A list of TCP port numbers as they are used by [[OpenBSC]] and related programs
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* Protocol extensions
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**[[MgcpExtensions]] -- Extensions to MGCP
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* [[simulation]] -- Running [[OpenBSC]] without a GSM Basestation
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* Important legal information on [[SoftwareLicensing]]
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* [[meas_web]] -- Web based measurement utility for [[OpenBSC]]
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h3. Information related to a specific BTS model
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{{child_pages(BTS_Hardware,depth=1)}}
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h3. Topics related to BTSs with classic E1 interface (non-IP based):
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{{child_pages(E1-Interface)}}
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h3. Miscellaneous Information
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* [[GSM]] -- Some links for starting to understand GSM
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* [[LegalNotes]] -- Important Legal notes on operating GSM base stations
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* [[FieldTests]] -- The [[OpenBSC]] field tests and their reports
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h3. Howtos
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* Standard configuration:
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*** [[Building_OpenBSC]] -- Getting started with [[OpenBSC]] under Debian
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*** [[multi-BTS_with_handover]] -- Connecting 2x BTS to a single BSC/NITB and enabling handover 
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* Advanced topics:
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*** [[OpenBSC_with_Asterisk]] -- A comprehensive tutorial on setting up [[OpenBSC]] with Asterisk
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*** [[OpenBSC_LCR]] -- [[OpenBSC]]+LCR with Asterisk (obsolete)
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*** [[OpenBSC_LCR_Ubuntu1204]] -- Short installation guide for [[OpenBSC]] with Asterisk on Ubuntu 12.04
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*** [[OpenBSC_Crypto]] -- Howto add A5/x cryptography support to your [[OpenBSC]] setup
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*** [[SDR_OsmoTRX_network_from_scratch]] -- Building everything from scratch for SDR based hardware with [[OsmoTRX]], [[OsmoBTS]] and [[OsmoNITB]].
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* RF Topics:
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*** [[cable_antenna]] -- Build new antennas for your BTS
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*** [[ethernet_dummyload]] -- Use an old ethernet terminator as dummyload
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*** [[10db_attenuator]] -- Turn 30mW into 3 mW
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h2. Developers
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* Browse the repositories at http://git.osmocom.org/
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* "Mailinglist":https://lists.osmocom.org/mailman/listinfo
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** For voice/SMS/..., use "OpenBSC":https://lists.osmocom.org/mailman/listinfo/openbsc
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** For GPRS/SGSN/data-comms related discussions, use "osmocom-net-gprs":https://lists.osmocom.org/mailman/listinfo/osmocom-net-gprs
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* [[Jenkins|Continuous Integration efforts]]
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* Wiki is right here ;)
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* Developer conferences: [[OsmoDevCon]]
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* [[Tasks]] -- Tasks/Internships/Junior Jobs for [[OpenBSC]] and Osmocom
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* [[Devtools]] -- Various tools to find/fix errors, send patches, etc
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* [[Coding_standards]] -- Coding standards
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* [[PacketDump]] -- Using wireshark on PCAP files
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h2. News
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* _OpenBSC ran many more experimental and commercial networks, but no one bothered to update this section..._
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* [[OpenBSC]] was running an experimental GSM network at "CCC Camp":http://events.ccc.de/camp/2011/wiki/GSM in the Summer of 2011
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* [[OpenBSC]] was running an experimental GSM network at "27c3":http://events.ccc.de/congress/2010 in December 2010
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* The slides of the "25C3 presentation _Running your own GSM network_":http://events.ccc.de/congress/2008/Fahrplan/events/3007.en.html "are available":http://events.ccc.de/congress/2008/Fahrplan/attachments/1259_25C3-OpenBSC.pdf.
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* The slides of the "26C3 presentation _Fuzzing GSM handsets using [[OpenBSC]]_":http://events.ccc.de/congress/2009/Fahrplan/events/3535.en.html "are available":http://events.ccc.de/congress/2009/Fahrplan/attachments/1503_openbsc_gsm_fuzzing.pdf
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h2. Related projects
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* [[simplehlr]] -- A web interface for the [[OpenBSC]] HLR database
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* [[OsmocomBB:]] - Free Software GSM protocol stack for mobile phones
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* "OpenBTS":http://gnuradio.org/redmine/projects/gnuradio/wiki/OpenBTS
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* "The THC GSM project":http://wiki.thc.org/gsm/
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* "airprobe.org":http://airprobe.org/
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* "Homepage of Dr.-Ing. Joachim Goeller":http://www2.informatik.hu-berlin.de/~goeller/
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h2. Thanks
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* to "On-Waves ehf":http://on-waves.com/ and "sysmocom GmbH":http://sysmocom.de/ for funding part of the development and maintennance
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* to http://junghanns.net for supporting us with discounted E1 boards
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* to "Netzing AG":http://netzing.de/ for funding part of the earlier [[OpenBSC:]] development
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* to Kevin Redon for the Osmocom logo
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