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Misc DECT hacks: New DECT research / playground

Added by laforge 3 days ago

Millenia (on the IT timescale) after deDECTed and about a decade after the now abandoned OsmocomDECT project, a group of people in and around Osmocom started to play with DECT again. There's no big plan, or no specific goal, other than getting more hands-on hack value with consumer DECT hardware, at its lowest levels.

It started with some innocent ringtone-hacking on a Gigaset C430 by manawyrm, followed by a much appreciated fix for the long-standing bug of Gigaset DECT phones radically over-charging (and eventually killing) their NiMH batteries (see Gigaset_C430_Hacking).

Initially, this required un-soldering and re-programming the SPI flash. After the debug UART was identified on the two test pads accessible from the battery compartment, manawyrm and tobleminer have figured out how to load code into the processor (see also ChipsUsed). Some initial related tools have been created and collected in the https://github.com/TobleMiner/dialog-sc14441-uart-boot repository. Using this you can execute your own code on the Gigaset C430, C300 and likely many other DECT phones using the Sitel (formerly NatSemi, now Renesas SC14xxx chipset family. Those who have had an eye on DECT for a longer time will recognize that this family of chips was also used in both the deDECTed as well as the OsmocomDECT CoA driver. It is also used in the Aastra/Mitel RFP base stations (see this OsmoDevCon2019 talk on RFP base stations and the 36C3 #mifail talk).

It's yet unclear where this will lead to. But it definitely is nice to see some people excited about playing with DECT devices again. If you want to follow developments in real-time, join us on the #osmocom IRC channel on https://libera.chat/

Retronetworking: 2022-12-07: RetroNetCall on ISDN B channel protocols

Added by laforge 5 days ago

We're happy to announce the next incarnation of RetroNetCall, the retronetworking oriented spin-off of OsmoDevCall

This time, laforge will be presenting on ISDN B-channel protocols: V.110, V.120, X.75, H.221

Topics include (not limited to)
  • description of the respective protocol
  • look at a protocol trace
  • status of open source implementations

When: Wednesday, December 7, 2022 from 20:00 CET

Time Topic Who
20:00 Meet and Greet everyone
20:10 ISDN B-channel protocols laforge
21:00 USSE (Unstructured Supplementary Social Event) everyone

Where: https://osmocom.org/RetroNetCall (Big Blue Button of https://franken.de/)

Osmocom Conferences (OsmoDevCon, OsmoCon, OsmoDevCall): 2022-11-16: MS/BS power control support in OsmoBSC/OsmoBTS

Added by laforge 21 days ago

we're happy to announce the next incarnation of OsmoDevCall. Based on the recent polls, the timing has shifted to every 3rd wednesday of the month.

This time, fixeria will be presenting on MS/BS power control support in OsmoBSC/OsmoBTS.

For those not entirely 3gpp-acronym-savyy: That's how the uplink (phone -> network) and downlink (network -> phone) transmit RF power level is adjusted during an active call in GSM.

When: Wednesday, November 16, 2022 from 20:00 CEST

Time Topic Who
20:00 Meet and Greet everyone
20:10 MS/BS power control support in OsmoBSC/OsmoBTS fixeria
21:00 USSE (Unstructured Supplementary Social Event) everyone

Where: https://meeting5.franken.de/b/har-xbc-bsx-wvs (Big Blue Button of https://franken.de/)

SIMtrace 2: Video Recording of SIMtrace2 tutorial available

Added by laforge 21 days ago

Some weeks ago, there was an OsmoDevCall presenting a SIMtrace2 Tutorial.

The video recording of this has now been edited and subsequently has been published at https://media.ccc.de/v/osmodevcall-20221019-laforge-simtrace2-tutorial

The PDF slides can be found at https://gitea.osmocom.org/laforge/laforge-slides/raw/branch/master/2022/osmodevcall-simtrace2/simtrace.pdf

We invite any new users of SIMtrace2 to have a look at this tutorial to get their setup going.

Cellular Network Infrastructure: Osmocom to receive funding from OpenTechFund

Added by laforge 26 days ago

We're happy to announce that sysmocom has achieved to obtain funding from Open Technology Fund for a variety of enhancements and improvemnts of the Open Source Cellular Network Infrastructure sphere.

The funded activities are in the following areas:

  • Better integration between the Osmocom 2G/3G core network elements and the open5gs 4G EPC (evolved packet core)
  • Improving the stability, quality and maturity of the open5gs EPC by implementing functional test suites in TTCN-3
  • Establishing interoperability with various base station hardware
  • Support three trial deployments in rural Mexico with our partner Rhizomatica
  • Organize a series of webinars for security researchers on how to use our tools for furthering their research projects

See also the project description at the OpenTechFund website

We'd like to thank OTF awarding funding to our proposal.

We'd also like to thank Rhizomatica and specifically Peter Bloom for all his help in putting together the proposal.

osmo-e1d: osmo-e1d user manual has been released

Added by laforge 27 days ago

It was recently noticed that years after first releasing the osmo-e1d software, we still didn't have a user manual for it.

We're happy to announce osmo-e1d now has at least a basic user manual has been merged into the repository

A pre-rendered PDF manual is available from https://downloads.osmocom.org/docs/latest/osmoe1d-usermanual.pdf

As a side-note, in addidition to the existing dpkg packages for various Debian and Ubuntu flavors, we're now also building osmo-e1d rpm packges for CentOS/AlmaLinux 8 and OpenSuse Tumbleweed, see https://obs.osmocom.org/package/show/osmocom:nightly/osmo-e1d

Retronetworking: 2022-11-09: RetroNetCall with OCTOI project status update

Added by laforge 27 days ago

We're happy to announce the next incarnation of RetroNetCall, the retronetworking oriented spin-off of OsmoDevCall

This time, laforge will be presenting a General status update on OCTOI (Osmocom Community TDMoIP)

Topics include (not limited to)
  • migation to co-located hub now fully completed
  • osmo-e1d status update
  • the new osmo-isdntap project for tracing/recording D and B channel data
  • Some initial research into H.221 / dissecting video calls
  • OCTOI BERT problems
  • 4x new Octoi_Event_PBX for rapid deployment of ISDN+POTS at various events
  • yate troubles regarding missing call.answer when using record/playback
  • resuming work on the BRI interface

When: Wednesday, November 9, 2022 from 20:00 CET

Time Topic Who
20:00 Meet and Greet everyone
20:10 OCTOI Project Status Update laforge
21:00 USSE (Unstructured Supplementary Social Event) everyone

Where: https://meeting5.franken.de/b/har-0y1-wch-et4 (Big Blue Button of https://franken.de/)

Cellular Network Infrastructure: Osmocom binary package repository URLs have changed

Added by osmith about 1 month ago

This is a reminder to update the repository URLs. As previously announced:

  • The binary packages are being built on Osmocom's own OBS server now.
  • We will stop pushing packages to the openSUSE OBS server at the end of October (in one week).

If you are using Osmocom binary packages, please make sure that you have configured the new repository URLs.

See the wiki for details:
https://osmocom.org/projects/cellular-infrastructure/wiki/Binary_Packages

Osmocom Conferences (OsmoDevCon, OsmoCon, OsmoDevCall): 2022-10-19: SIMtrace2 Tutorial

Added by laforge about 2 months ago

After a rather extended 2022 summer break, we're happy to announce the next incarnation of OsmoDevCall. Based on the recent polls, the timing has shifted to every 3rd wednesday of the month.

This time, laforge will be presenting a SIMtrace2 tutorial, showing SIM card protocol tracing, decoding with the new pySim-trace as well as the card emulation firmware.

When: Wednesday, October 19, 2022 from 20:00 CEST

Time Topic Who
20:00 Meet and Greet everyone
20:10 SIMtrace2 Tutorial laforge
21:00 USSE (Unstructured Supplementary Social Event) everyone

Where: https://meeting5.franken.de/b/har-xbc-bsx-wvs (Big Blue Button of https://franken.de/)

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