Open Collective

Osmocom

COLLECTIVE
Open source
europe
gsm
5g
cellular
3gpp
Fiscal Host: Open Source Europe

Open Source Mobile Communications

This is Osmocom's pageOsmocom
About
Connect
Contribute
Budget

About

The Osmocom project is an umbrella project regarding Open source mobile communications. This includes software and tools implementing a variety of mobile communication standards, including GSM, GPRS, EDGE, UMTS, DECT, TETRA and others.

The most well-known examples are:
  • the network-side GSM and 3G implementations Osmocom CNI, originally known as OpenBSC (but now including BTS, PCU, BSC, MSC, HLR, PCU, SGSN, GGSN)
  • the phone-side GSM implementation OsmocomBB
  • the RTL-SDR project to use DVB-T receivers as general purpose software defined radio receivers.
  • the pySim project, a swiss army knife tool to explore, decode/encode, provision and otherwise work with SIM/USIM/ISIM cards and eUICCs.

Our team

Harald Welte

Admin

Sylvain Munaut

Admin

Oliver Smith

Admin

Pau Espin Pedrol

Core Contributor

Connect

Let’s get the ball rolling!

News from Osmocom

Updates on our activities and progress.

Several minor and patch releases for Osmocom CNI

New libosmocore minor version 1.13.0 was released with main improvements:Tons of fixes and improvements in osmo_io, gsmtap and logging.log targets configured over VTY are now used in non-blocking synchronous mode by default.Improved feature...
Read more
Published on February 20, 2026 by Oliver Smith

December 2025 Osmocom CNI releases

The Osmocom project has released new version 202512 of the CNI (Cellular Network Infrastructure) software. Those new tagged/released versions contain up to 10 months of work since the previous versions released during February 2025. Some pr...
Read more
Published on December 5, 2025 by Oliver Smith

osmo-bsc 1.13.2 released

We've released osmo-bsc 1.13.2. It contains 2 fixes for 2 bugs introduced between osmo-bsc 1.12.1 and 1.13.0. One of them may cause sporadic BTSs to be rejected upon connection at the BSC. Only osmo-bsc releases 1.13.0 and 1.13.1 are affect...
Read more
Published on September 2, 2025 by Oliver Smith

Contribute

Become a financial contributor.

Financial Contributions

Recurring contribution
Backer

Become a backer for $5.00 per month and support us

Starts at
$5 USD / month

Latest activity by

+ 1
Recurring contribution
Sponsor

Become a sponsor for $100.00 per month and support us

Starts at
$100 USD / month

Latest activity by

Custom contribution
Donation
Make a custom one-time or recurring contribution.

Latest activity by

+ 22

Events

Osmocom is hosting the following events.

Past event
OsmoDevCall: TFO in GSM and 3GPP networks
07:00 PM-09:00 PM UTC
@falconia will be presenting on TFO (Tandem Free Operation) in GSM and 3GPP networks
Past event
OsmoDevCon 2024
→
08:00 AM UTC
Osmocom Developer Conference 2024
Past event
OsmoDevCall #3
07:00 PM-09:00 PM UTC
Osmocom Developer Call #3 - multi-TRX + frequency hopping in OsmoBTS
Past event
Osmocom Conference 2018
→
08:00 AM UTC

Top financial contributors

Individuals

1
Carl Laufer

€8,264.35 EUR since Jun 2018

2
Shawn C

€1,337 EUR since Apr 2020

3
two_ack

€210.5 EUR since May 2019

4
rodia

€150 EUR since Sep 2021

5
AsciiWolf

€82.12 EUR since Apr 2024

6
HackSmith

€75.58 EUR since Jun 2018

7
Royce Connerley

€50 EUR since Feb 2019

8
Guest

€50 EUR since Jul 2023

9
Tianma

€24.09 EUR since Mar 2021

10
Kevin

€20 EUR since May 2023

11
hanspeter

€20 EUR since Dec 2023

12
Matt

€20 EUR since Apr 2024

13
N3sT0rJhonson

€20 EUR since Jun 2024

14
Incognito

€15 EUR since Dec 2024

15
anonymous

€10 EUR since Aug 2018

Organizations

1
Least Authority

€100 EUR since Apr 2021

Osmocom is all of us

Our contributors 30

Thank you for supporting Osmocom.

Harald Welte

Admin

Sylvain Munaut

Admin

Oliver Smith

Admin

Pau Espin Pedrol

Core Contributor

Carl Laufer

sponsor

€8,264 EUR

Shawn C

€1,337 EUR

two_ack

backer

€211 EUR

rodia

€150 EUR

Least Authority

€100 EUR

Least Authority wants to support your work thro...

AsciiWolf

backer

€82 EUR

HackSmith

backer

€76 EUR

Royce Connerley

€50 EUR

Budget

Transparent and open finances.

Monthly financial contribution to Osmocom (sponsor)

Credit from Carl Laufer to Osmocom •

+$100.00USD
Completed
Contribution #11209
Monthly financial contribution to Osmocom (sponsor)

Credit from Carl Laufer to Osmocom •

+$100.00USD
Completed
Contribution #11209
Monthly financial contribution to Osmocom (sponsor)

Credit from Carl Laufer to Osmocom •

+$100.00USD
Completed
Contribution #11209
€
Today’s balance

€582.71 EUR

Total raised

€9,148.92 EUR

Total disbursed

€8,566.21 EUR

Estimated annual budget

€1,039.03 EUR