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laforge, 06/11/2024 05:30 PM


As OsmoDevCon could not be hosted in 2020 nor in 2021 due to the Corona virus outbreak, we started hosting an Osmo com Dev eloper Call format of online meetings within the Osmocom community (originally discussed in #4928).

The formant serves two major purposes:

  1. technical presentations about osmocom relevant topics - ideally current/recent developments
    • can be pre-recorded to avoid any problems with technical setup, streaming, ...
    • should ideally have a Q+A session at their initial "airing" during one OsmoDevCall
  2. unstructured supplementary social event (USSE)
    • random chat in audio (optionally video)
    • not recorded, obviously

Not every OsmoDevCall would necessarily need the two parts, but I think it would be great if we can make that happen. We could also have e.g. a two-weekly schedule for the USSE and a monthly schedule for the technical presentation.

We'd need somebody to volunteer to "manage" the "broadcast" side of this, preferably somebody with at least some prior exposure to online events (like the c3voc).


Wednesday evening, 8pm CET (winter) / CEST (summer), every 3rd Wednesday of the month

The next few events hence are:

  • Wednesday, June 19th, 2024
  • Wednesday, July 17th, 2024
  • Wedensday, August 21st, 2024
  • Wednesday, September 18th, 2024
  • Wednesday, October 16th, 2024

Venue / Platform

We are currently using infrastructure of KNF, a German non-profit internet organization of which laforge is a member.

The URL to join the meeting is

There currently is no password or authentication, we try to welcome anyone. If this turns out to be a problem, we might lock it down in the future, let's hope that's not required.

Video Recordings of talks

The recording of the technical presentation should then be permanently made available (like the presentations of our prior OsmoCon / OsmoDevCon). The recordings can be found

Topics (for the "presentation" part)


This is a wishlist of future topics for the "presentation" part:

Topic Possible Speaker Tentative Date
OpenMobileNetworkToolkit derpeter
MSC pooling neels
SGSN pooling daniel
Frame Relay based Gb interface / NS2 laforge, lynxis
VAMOS fixeria, Hoernchen, neels
Distributed GSM neels, osmith
E1 based BTSs using OsmoBSC + OsmoMGW laforge, dexter, keith
Location Services and OsmoLCS neels
CSFB with Osmocom + open5gs EPC
Visualizing Osmo* internals with opentelemetry daniel
State of TTCN-3 test cases for OsmoPCU pespin
DebugMux: getting baseband logs from old Sony Ericsson phones fixeria, roox
PV solar array generation and house power consumption monitoring with osmo-modbus pespin
userspace tracing / tracepoints using systemtap, USDT laforge
mPCIe and M.2/ngff modem breakout boards laforge, mschramm
SFP experimenter and SFP breakout boards laforge, tnt
RF basics for software/protocol developers ?
Improved GPRS Mobility: RIM, NACC and eNACC pespin
The DIAMETER Protocol and its use in 3GPP laforge
Running Debian armel via NFS chroot on the SysmoBTS keith
FreeCalypso SIMsniff: fully multivolt, and using an iCE40 FPGA instead of AT91SAMx falconia
Experiences with FTDI and Silabs USB-serial chips in OSHW projects falconia
GSMA IoT eSIM (as opposed to consumer or M2M) laforge
Cooperation between Osmocom and Themyscira: GSM networks that require transcoding to G.711 falconia 2024-06-19
TCH/HS Rx error detection and flagging falconia


We'll move the events from the above table to here once they have happened.

Topic Speaker Date Video
Cell Broadcast and OsmoCBC laforge 2021-02-26
Review of what happened in Osmocom in 2020 laforge 2021-03-12 H.264 VP9
mult-TRX + frequency hopping in OsmoBTS fixeria 2021-03-26 H.264 VP9
pysim-shell - next generation of SIM card tools laforge 2021-04-09 H.264 VP9
YIG & YANG (Yet ANother yiG driver) horiz0n 2021-04-23 H.264 VP9
SS7 and SIGTRAN in 2G/3G networks laforge 2021-05-14 H.264 VP9
Hacking binary protocols with Pycrate fixeria 2021-05-28 H.264 VP9
A screen sharing peek at TIC A.C. infra in Oaxaca keith 2021-06-11 H.264 VP9
Open5GS setup walkthrough miaoski 2021-07-09 H.264 VP9
high-level overview on IMS, VoLTE, VoWiFi laforge 2021-07-23 H.264 VP9
GSM-R: What's the difference to GSM? laforge 2021-08-13 H.264 VP9
osmo-remsim in practice laforge 2021-08-27 H.264 VP9
Towards an ISO 7816 smart card interface FPGA softcore tnt 2021-09-24 H.264 VP9
VoLTE + IMS pcap deep dive laforge 2021-10-08 none
SIM card profile creation, personalization, production laforge 2021-10-22 H.264 VP9
TDM, E1, PDH, SDH, STM-1 and Pseudowires laforge 2021-11-12 H.264 VP9
iceE1usb in practice tnt 2021-11-12 H.264 VP9
Control/User Plane Separation (CUPS) and PFCP laforge 2021-11-25 H.264 VP9
osmo-dev and running Osmocom TTCN-3 testsuites locally osmith 2021-12-10 H.264 VP9
Retronetworking: V5 interfaces in ISDN/PSTN laforge 2021-12-28 H.264 VP9
voice codec negotiation in Osmocom CN and SIP neels 2022-01-14 H.264 VP9
Advanced SIM card topics: GlobalPlatform SCP02, OTA, ARA-M, ISIM laforge 2022-02-25 H.264 VP9
USB-C - the connector and USB-PD tsaitgaist 2022-03-11 H.264 VP9
Iridium reverse engineering update Sec, schneider 2022-03-25 PDF
Osmocom Community TDMoIP (OCTOI) laforge 2022-04-29 H.264 VP9
SIMtrace2 tutorial laforge 2022-10-19 H.264 VP9
MS/BS Power control support in OsmoBSC/OsmoBTS fixeria 2022-11-16 H.264 VP9
USB hub for device testing tsaitgaist 2022-12-21 H.264 VP9 slides
ice40-usbtrace tnt 2023-01-18 H.264 AV1
Long range telecommunications in HF band rafael2k 2023-02-15 H.264 AV1
Circuit Switched Data (CSD) laforge 2023-03-15 H.264 AV1
FR/HR/EFR voice codecs in Osmocom RAN falconia 2023-06-21 H.264 AV1 Slides TXT Slides PDF
building wired RF test setups for cellular laforge 2023-07-19 H.264 AV1
Themyscira Wireless: Osmocom CNI meets USA PSTN falconia 2023-09-20 H.264 AV1 Slides TXT Slides PDF
Calypso chipset history and development boards, from TI to FreeCalypso falconia 2023-11-15 H.264 AV1 Slides TXT Slides PDF
Using pySim-shell on sysmoISIM-SJA5 cards laforge 2023-12-20 H.264 AV1
Exploring eUICCs and eSIMS using pySim, lpac and osmo-smdpp laforge 2024-01-17 H.264 AV1

Code of Conduct

The existing Code_of_Conduct of our previous physical / on-site / presence meetings applies.

Updated by laforge 8 days ago · 203 revisions

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