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laforge, 02/11/2022 07:28 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

The recording of the technical presentation should then be permanently made available (like the presentations of our prior OsmoCon / OsmoDevCon). Right now there is no permanent location yet, but you can get recordings at . They can also be found on

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).


[usually] Friday evening, 8pm CET/CEST, every 2nd and 4th friday of the month

The next couple of events hence are:
  • Friday, February 11, 2022
  • Friday, February 25, 2022

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 (note the changed URL, as of 02/2022 it's now meeting5, not meeting4 anymore)

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.

Topics (for the "presentation" part)


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

Topic Possible Speaker Tentative Date
MS/BS Power control support in OsmoBSC/OsmoBTS fixeria
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
SIMtrace2 tutorial laforge
building wired RF test setups for cellular laforge, mschramm
CSFB with Osmocom + open5gs EPC
Long range telecommunications in HF band rafael2k
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
Iridium reverse engineering update Sec, schneider
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
Retronetworking: FDDI laforge
Retronetworking: Token Ring laforge, blackbit
Retronetworking: Frame Relay
Retronetworking: Analog Telephone Modems and towards a 2022 OSHW softmodem laforge + tnt
USB-C - the connector and USB-PD tsaitgaist 2022-02-25


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
mult-TRX + frequency hopping in OsmoBTS fixeria 2021-03-26 H.264
pysim-shell - next generation of SIM card tools laforge 2021-04-09 H.264
YIG & YANG (Yet ANother yiG driver) horiz0n 2021-04-23 H.264
SS7 and SIGTRAN in 2G/3G networks laforge 2021-05-14 H.264
Hacking binary protocols with Pycrate fixeria 2021-05-28 H.264
A screen sharing peek at TIC A.C. infra in Oaxaca keith 2021-06-11 H.264
Open5GS setup walkthrough miaoski 2021-07-09 H.264
high-level overview on IMS, VoLTE, VoWiFi laforge 2021-07-23 H.264
GSM-R: What's the difference to GSM? laforge 2021-08-13 H.264
osmo-remsim in practice laforge 2021-08-27 H.264
Towards an ISO 7816 smart card interface FPGA softcore tnt 2021-09-24 H.264
VoLTE + IMS pcap deep dive laforge 2021-10-08 none
SIM card profile creation, personalization, production laforge 2021-10-22 H.264
TDM, E1, PDH, SDH, STM-1 and Pseudowires laforge 2021-11-12 H.264
iceE1usb in practice tnt 2021-11-12 H.264
Control/User Plane Separation (CUPS) and PFCP laforge 2021-11-25 H.264
osmo-dev and running Osmocom TTCN-3 testsuites locally osmith 2021-12-10 H.264
Retronetworking: V5 interfaces in ISDN/PSTN laforge 2021-12-28 H.264
voice codec negotiation in Osmocom CN and SIP neels 2022-01-14 H.264

Code of Conduct

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

Files (1)
USB hub for device testing.pdf View USB hub for device testing.pdf 25.6 MB tsaitgaist, 12/21/2022 08:16 PM

Updated by laforge about 2 years ago · 105 revisions

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