- Cellular Modem Information
collects various bits of (low-level technical) information on cellular modems
- Cellular Network Infrastructure
This is a group of Osmocom programs implementing cellular network infrastructure components for GSM, GPRS, EDGE, UMTS, HSPA, LTE and their associated interfaces and protocol stacks.
This includes components for classic circuit-switched GSM:...
- Core Network (CN)
OsmoBSCNAT is an A-interface aggregator that can aggregate many A-interface links from many BSCs and present them as one A interface towards a MSC. Most normal networks will not need this component, it only serves some special use case scenarios. It requires SCCPLite and doesn't work with 3GPP AoIP....
- OsmoGGSN (former OpenGGSN)
An Open Source implenentation of a HNB-GW (HomeNodeB-Gateway), implementing the Iuh, IuCS and IuPS interfaces. It aggregates the Iuh links from femtocells (hNodeBs) and presents them as regular IuCS and IuPS towards MSC and SGSN (such as OsmoMSC and OsmoSGSN). It uses M3UA as signaling transport....
This project contains proof-of-concept code to send GPS assistance data to mobile phones using RRLP (Radio Resource Location Protocol) as well as inquiring/obtaining their geolocation using RRLP queries. It uses OsmoNITB to operate the GSM network, and a u-blox GPS receiver to obtain the assistance data....
This is a python-based test framework by which we can control a set of BTSs and Modems to execute full-system end-to-end verification tests. We use this within Osmocom to du full end-to-end testing with all our network elements and real BTS + RF + Modem Hardware....
Osmocom STP (Signal Transfer Point), implementing SS7 (MTP) routing and SIGTRAN Signalling Gateway functionality. Supports SIGTRAN only, no legacy E1/T1 based signaling links. Currently only MTP-level routing no GTR or GTT yet, but contributions in that area are very welcome....
- Radio Access Network
Osmocom Radio Access Network (RAN)
- Erlang Core Network Signalling Projects
A set of almost complete Erlang projects implementing the core network protocol stacks from SS7/SIGTRAN over SCCP up to TCAP, MAP and CAP.
Currently not actively maintained due to lack of active customer/user interest.
Erlang MGW NAT/MASQ implementation
Erlang implementation of a TCPAP+MAP codec (encoding/decoding). You most likely want to use signerl, not this.
Erlang implementation of SCCP (ITU-T Q.71x)
Erlang implementation of M2UA/M3UA/MTP3/SCCP/ISUP codec + utils
Erlang implementation of TCAP + MAP Signalling Protocols, runs on top of osmo_ss7 and osmo_sccp
- Hardware Projects
A collection of various small (and not so small) hardware projects created as tools to the cellular research community
- E1/T1 Tap Adapter
￼The Osmocom E1/T1 tap adapter allows you to tap into the communication of an E1/T1 line.
This is useful for tracing/analyzing communications on any type of E1/T1 based interface, such as A-bis, A and core network interfaces in GSM networks, as well as classic ISDN networks....
- mPCIe WWAN modem USB breakout board
This is a small break-out board for miniPCIe (mPCIe) type cellular / WWAN modems.It allows you to insert a mPCIe modem from any vendor, and it will provide you with:
- mini USB socket for connection to a USB Host (like your PC/Laptop or Embedded System)...
- multi-voltage USB UART
A small USB UART board with two CMOS UARTs exposed on 2.54mm headers.
The logic voltage can be manually selected at 1.8, 2.3, 2.5, 2.8, 3.0 or 3.3V
UmTRX is a dual-channel wide-band SDR transceiver that is designed to be used with OpenBTS and OsmoBTS GSM base stations. Given its SDR architecture UmTRX can easily be used with many other RF applications, and a combination of FPGA and FPRF (Field-Programmable RF) technology plus the ability to process data on a CPU or a DSP, makes it an extraordinarily flexible platform. See UmTRX....
- Miscellaneous Projects
This is basically a place-holder for everything else that doesn't fit in other places.
- GSM Audio Pocket Knife
The GSM Auido Pocket Knife is a small tool that can encode and decode all of the GSM codecs and can convert between various different frame formats, such as the RTP payload formats, those used by the TI Calypso DSP, the Racal 61x3 testers, etc. You can use it as a RTP sink to play back a RTP stream from OsmoBTS. ...
- Mobile (in)Security
This website is intended to collect information about publicly-known security issues and other bugs of mobile communications systems, with a particular focus on the 3GPP-specified protocol layers of GSM, GPRS, EDGE and WCDMA. We collect informationon issues at any protocol layer and at any of the interfaces, i.e. the Um air interface just as well as A-bis, A, IuB, C or any of the SS7/MAP/TCAP based core network interfaces....
Scalable Smalltalk/Pharo SMSC with SMPP input and SMPP and SS7 output.
OP25 is a not-for-profit project to bring together folks that are interested in implementing APCO P25 using a software-defined radio. Our goal is to build a software-defined analyzer for APCO P25 signals that is available under the GNU Public License (GPL)....
- Osmocom Analog
This is a project implementing the analog cellular systems used in Germany and other countries in the past. It provides base station implementation of A-Netz (German pre-cellular), B-Netz (German pre-cellular), C-Netz (German cellular), NMT (Scandinavian: Nordisk Mobil Telefon) and AMPS/TACS (American: Advanced Mobile Phone Service)....
- Osmocom Libraries
This is about a set of shared C programming libraries the Osmocom project develops+maintains, such as
This is the A-bis interface library as used by OsmoBSC/OsmoNITB
This is a network interfacing library intended to abstract all kinds of signalling + user payload interfaces, including Abis/IP (IPA), A/IP (SCCPlite), as well as the Osmux protocol
- libosmo-sccp + libosmo-sigtran
Osmocom SCCP + Sigtran (M3UA, SUA) library
This covers the libosmocore.git repository including libosmocore, libosmogsm, libosmogb, libosmoctrl, libosmocodec, libosmocoding.
This is the Osmocom version of libsmpp34, an implementation of the SMPP Protocol v3.4
- Osmocom.org Servers
This is a meta-project about this redmine and our mailman, jenkins, etc. installations.
OsmocomBB is an Free Software / Open Source GSM Baseband software implementation. It intends to completely replace the need for a proprietary GSM baseband software.
This is a more experimental, work-in-progress port of the OsmocomBB Layer1 to the Nuttx RTOS
This is the homepage of the Osmocom sub-project GEO Mobile Radio.
- OsmoDevCon + OsmoCon
The Osmcoom [Developer] Conference, an annual event where Osmocom Developers and Users gather
- Retro-BBS / BBS-Revival
Project about Retro-Communication using BBSs, Modems, DFÜ, Points, etc ...
The goal here is to re-create the modem / bbs / mailbox communication systems of the late 1980ies and 1990ies.
We use the bbs-revival mailing list to coordinate...
FidoNet related stuff
Here is the generic Linux Modem. This modem is totally software, it means that all the DSP stuff is done by the main CPU, as in some so called "winmodems".
- Linmodem is also a research project. It contains all the necessary stuff to test new digital communication algorithms. The line simulator and the X11 interface can be used to simulate a complete communication chain....
- UUCP and UseNet
UUCP and UseNet related stuf
Z-Netz related stuff
- SDR (Software Defined Radio)
A collection of SDR related software + hardware projects
- Osmocom Card Operating System
Osmocom COS (or short OsmoCOS) is an abandoned attempt at creating an experimental Card Operating System for smart cards, specifically for those based on the ChipCity CC32RS512 microcontroller.
pySim is a small command-line tool to program(write to) a variety of programmable sim cards.
Osmocom SIMtrace is a hardware device and associated firmware + host software to trace the communication between phone and SIM card.
A software implementation (simulation) of a SIM card
Play with the plugins we have
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