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Name Description
Cellular Modem Information

collects various bits of (low-level technical) information on cellular modems

Altair LTE Modems

Information about the Altair "FourGee" 3100 - 3800 LTE modems

Huawei HiSilicon Cellular Modems

Information collected on Huawei cellular modems

Qualcomm Linux Modems by Quectel & Co

Information / Research on the internals of Qualcomm Linux based cellular modems available from Quectel and other vendors

osmo-qcdiag

Osmocom tool for Qualcomm DIAG

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:...

cni-legacy

legacy and/or unmaintained CNI projects

cellmgr-ng

An utility to convert the circuit-switched A interface of a BSplus into SCCP-lite A-over-IP

OpenBSC

This is a legacy all-in-one implementation of the Osmocom BSC + MSC + HLR, instead refer to OsmoBSC, OsmoMSC, OsmoHLR.

This is a project aiming to create a Free Software, (A)GPL-licensed software implementations for the GSM/3GPP protocol stacks and elements....

OsmocomLCS

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....

Core Network (CN)

Osmocom Core Network (CN). This includes Free/Open Source Software implementation of cellular core network elements, such as OsmoMSC, OsmoSGSN, OsmoHLR, OsmoGGSN and others.

osmo-gbproxy

The Osmocom Gb Proxy is a proxy for the 3GPP Gb interface (between BSS/PCU and SGSN). It allows you to aggregate many Gb links/connections into one. It also has the ability to convert between different Gb interface protocol stacking, such as from Gb-over-FrameRelay to Gb-over-IP....

osmo-sip-connector

This is the modern gateway between the MNCC Interface of OsmoMSC and OsmoNITB and an external SIP trunk. It converts between GSM TS 44.007 MNCC primitives on the one hand side and SIP messages on the other, while also signaling the RTP IP/port parameters for the voice user plane....

OsmoBSCNAT

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....

OsmoCBC

Osmocom Cell Broadcast Centre (CBC). It is the heart of the Cell Broadcast Service (CBS) as well as a variety of disaster/emergency warning systems (PWS).
OsmoCBC provides a REST/JSON interface for receiving cell broadcast messages from external entities and a 3GPP CBSP interface towards BSCs like OsmoBSC. Soon to be extended with SABP support towards RNCs....

OsmoGGSN (former OpenGGSN)

OsmoGGSN is an Open Source implementation of a GGSN (Gateway GPRS Support Node). It is the successor to OpenGGSN and provides a Gp (GTP v0/v1) interface towards SGSNs like OsmoSGSN and a Gi interface towards the IP network. It supports Linux kernel GTP-U acceleration via a linux-kernel-gtp-u....

Linux Kernel GTP-U

This is an implementation of the GTP-U (user plane) inside the Linux kernel. Originally developed within Osmocom, it was brought further in cooperation by Travelping, and is now in mainline Linux since 4.7.0. You can use it as a high-performance user plane e.g. from OsmoGGSN...

OsmoHLR

The Osmocom Home Location Register (OsmoHLR) is the subscriber database and authentication key store of an Osmocom 2G/3G network. It implements the GSUP protocol which is used by OsmoMSC and OsmoSGSN instead of the classic 3GPP TCAP/MAP protocols....

OsmoHNBGW

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....

OsmoMSC

New (2017) Osmocom Mobile Switching Center (MSC). It provides a 3GPP AoIP interface towards BSCs like OsmoBSC as well as 3GPP IuCS towards RNCs or HNB-GWs like OsmoHNBGW as well as GSUP towards OsmoHLR. Also features a minimal built-in SMSC with SMPP interface....

OsmoSGSN

OsmoSGSN is an Open Source implementation of a SGSN (Serving GPRS Support Node). It provides a 3GPP Gb/IP interface towards PCUs like OsmoPCU as well as a Gp (GTP) interface towards GGSNs like OsmoGGSN and a GSUP interface towards OsmoHLR....

OsmoSTP

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....

Distributed GSM

Distributed GSM architecture, suitable for de-centralized, autonomous networks with intermittent connectivity.

IMSI Pseudonymization

USIM applet and HLR feature to allow obfuscating the IMSI of a subscriber,
without the need to change any intermediate core network component.

git://git.osmocom.org/imsi-pseudo
git://git.osmocom.org/sim/sim-tools

osmo-e1-recorder

A program to record traffic on E1 or T1 TDM interfaces to disk. This provides tcpdump-like functionality for TDM interfaces. You can configure on a per-timeslot bases if the raw bitstream should be recorded, or if a HDLC decoder should be used. Requires a high-impedance tap and two E1/T1 ports per link you want to monitor (one for Rx, one for Tx)....

osmo-ePDG - VoWifi Evolved Packet Data Gateway

plan for upcoming open source ePDG (IPsec cateway for VoWiFi)

OsmoGSMTester

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....

OsmoMGW

Osmocom Media Gateway, to manage, connect and optionally transcode voice streams between different network elements such as BTSs and external entities like SIP. It is typically co-located with both OsmoBSC and OsmoMSC and controlled by them via IETF MGCP (Media Gateway Control Protocol)....

OsmoSMLC

Osmocom Serving Mobile Location Center

Radio Access Network

Osmocom Radio Access Network (RAN)

OsmoBSC

OsmoBSC is an Open Source BSC (GSM Base Station Controller) with A-bis/IP and A/IP interface. It supports a variety of BTS Vendors/Models, including some Siemens, Nokia, Ericsson and ip.access models. However, main focus during the last 5+ years is OsmoBTS based BTSs....

OsmoBTS

OsmoBTS is an Open Source GSM BTS (Base Transceiver Station) with A-bis/IP interface. It implements support for a variety of PHY/Hardware, such as sysmocom sysmoBTS, OCTSDR-2G and LiteCell 1.5, but also general-purpose SDR boards such as USRP or LimeSDR via OsmoTRX....

OsmoHNodeB

This is a first step towards implementing a minimal hNodeB upper layer part, mainly handling HNBAP/RUA/RANAP messages on the Iuh interface. This is not expected to be a full / usable hNodeB anytime soon [if ever].

OsmoPCU

OsmoPCU is an Open Source GPRS/EGPRS PCU (Packet Control Unit) with Gb/IP interface. It connects via a pcu_socket to OsmoBTS or OsmoBSC and provides RLC/MAC layer and air interface scheduling for GPRS/EGPRS. Connects via 3GPP Gb/IP to a SGSN like OsmoSGSN...

OsmoTRX

OsmoTRX is a GSM Radio Modem based on a fork of the OpenBTS Transceiver program. It is intended to be used with the osmo-bts-trx variant of OsmoBTS in order to build GSM base stations with Abis/IP interface from general purpose SDR hardware such as USRP or LimeSDR devices....

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

Erlang MGW NAT/MASQ implementation

erlang/osmo_map

Erlang implementation of a TCPAP+MAP codec (encoding/decoding). You most likely want to use signerl, not this.

erlang/osmo_sccp

Erlang implementation of SCCP (ITU-T Q.71x)

erlang/osmo_ss7

Erlang implementation of M2UA/M3UA/MTP3/SCCP/ISUP codec + utils

erlang/signerl

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 Hardware Interface (including icE1usb)

This is about various projects implementing diffrent types of E1/T1 interfaces, including osmo-e1-xcvr, as well as a passive e1-tracer and icE1usb, our latest ICE40 FPGA based USB-E1 adapter.

osmo-e1d

Osmocom E1 daemon; used as a "software defined" implementation of E1, where the framer and HDLC controller is implemented inside osmo-e1d and a relatively simple hardware (such as USB attached hardware) interfaces with the actual E1 physical line.

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....

M.2 (NGFF) WWAN modem + SIM Card emulation board

This is a carrier board for M.2 (NGFF) type cellular / WWAN modems with integrated SIMtrace2.

It allows you to insert a M.2 modem from any vendor, and it will provide you with:
  • mini USB 3 socket for connection to a USB Host (like your PC/Laptop or Embedded System)...
M.2 (NGFF) WWAN modem USB breakout board

This is a small break-out board for M.2 (NGFF) type cellular / WWAN modems.

It allows you to insert a M.2 modem from any vendor, and it will provide you with:
  • mini USB 3 socket for connection to a USB Host (like your PC/Laptop or Embedded System)
  • 5V DC input for power supply (USB supply usually insufficient for a modem)...
Misc Hardware Projects

Various uncategorized small hardware projects that don't each deserve their own redmine project

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

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