OpenBSC

openbsc@lists.osmocom.org

5 participants
4173 discussions

Mobile disassociates from sysmobts 1002 after call

by Christoph Quirin Lauter

Hello, I am sorry, this might not be the right place to ask. I am kind of a newbie to the osmocom stack as well, so please be gentle with me. I recently got an FCC license in the 900MHz range and I am running sysmobts 1002 at home. I have updated it from NITB to the modern world of course. Everything seems to work as it should but there is one issue: A Pixel 9 Pro Android phone with a sysmocom SIM card (999/70) connected to the sysmobts disassociates -in certain cases- with the BTS/BSC after a call and displays "No network". It will never reassociate again, unless I put the phone in airplane mode and back on. Then it reassociates immediately again. I cannot see anything particular in the osmo-bsc/osmo-bts-sysmo logs but as I said, I am a newbie. I will be happy to post the logs if this is helpful. The issue does not arise for each call, only certain calls. I use osmo-sip-connector to an asterisk. Is this a known issue? Is it an issue with the phone? Did I configure something in a wrong way? I will do some experiments with another GSM phone. Thank you! Christoph Lauter

6 days, 2 hours

Move vlr code from osmo-msc into a own library

by Alexander 'lynxis' Couzens

Hi, a couple month ago I proposed to make the VLR code of the osmo-msc independent of the osmo-msc and create a new library called libosmo-vlr. Later use the libosmo-vlr code to integrate it into osmo-sgsn. But after take more time of this approach, I'm not sure if it is a very good idea to guarantee high stability of libosmo-vlr as we do for other osmocom libraries. Because the code is heavily integrated with both daemon and some code path are quite complex and partly not fully understood. I would rather guarantee runtime stability within a library version, but not at build time. The strategy would be increasing the library major version more often. Any thoughts? Best, lynxis PS. The current concept (because of time pressure) is to keep 2 copies of libosmo-vlr in the code base of osmo-msc and osmo-sgsn and to move it later out of it into an own library.

6 days, 4 hours

Having trouble balancing GSM projects and coursework?

by fennellmarian018＠gmail.com

As someone knee-deep in OpenBSC settings and attempting to gain a firm understanding of BTS to BSC handovers, I've struck a stumbling block in balancing my technical deep dives with academic duties. Between tracing Abis interface logs and diagnosing paging issues, I barely have time to concentrate on my finance studies. To be honest, I've pondered finding someone to take my accounting class for me so that I can continue with my telco experiments here. I'm not sure whether anyone else is dealing with the same workload, but if you've discovered a solid workflow or technique, I'd love to hear about it because OpenBSC is currently capturing my full attention. visit: https://takemycourseforme.us.com/pay-someone-to-take-my-online-accounting-c…

1 week, 1 day

Struggling with Assignments? Let’s Talk About It!

by teves20525＠binafex.com

Hey everyone, I’ve been seriously overwhelmed lately trying to manage all my coursework, deadlines, and part-time job. It’s got me thinking how do others handle the pressure? I’ve been considering looking into an online university assignment help UK service but I’m not sure where to begin. Are these services reliable? Have you used one that actually delivered quality work without breaking the bank? I’m really looking for honest recommendations or red flags to avoid. What should I keep in mind before choosing one? Let’s share experiences maybe we can help each other out! Visit here: https://assignmenthelpinuk.co.uk/university-assignment-help/

1 week, 4 days

New MGW for E1 Abis, future ThemWi sw plans

by Mychaela Falconia

Dear Osmocom community, I am pleased to announce the first usable version of my new MGW for use with OsmoBSC and E1-based BTS: https://gitea.osmocom.org/themwi/tw-e1abis-mgw This new sw component works as a drop-in replacement for osmo-mgw in the role of BSC-associated MGW for E1 Abis. Principal new features compared to OsmoMGW-E1 are: * The path from RTP input to fixed-timing TRAU-DL output passes through ThemWi jitter buffer (twjit), instead of blindly converting every received RTP packet to a TRAU-DL frame, queueing those frames to I.460 MUX Tx and hoping for the best. * For FR codec in the present implementation and for EFR coming later, a proper UL-to-DL transform (aka TFO transform) is applied to this RTP-to-DL path. This way if the stream of UL frames from the other call leg includes gaps due to radio errors, FACCH stealing or DTXu pauses, or if gaps are caused by packet loss, the stateful transform will produce proper error concealment or comfort noise insertion per TS 28.062 section C.3.2.1.1. * CSD is supported! This development may be the first time in Osmocom history of CSD working on an E1-based BTS. I tested this new MGW with Nokia InSite BTS and confirmed it working with all 3 classic GSM voice codecs (FR, HR and EFR) and with CSD up to 9600 bps. CSD at 14400 bps (D145_SYNC and EDATA frames) is supported too, but remains untested due to lack of needed support in OsmoMSC. My eventual goal is to use OsmoBSC and this new MGW with Ericsson RBS6k BTS, consisting of DUG20 and RUS or RRUS. I already have DUG20 and RUS01 hardware, but given all other work I still have to do on ThemWi CN software, I haven't got around to playing with Ericsson gear yet. My plans going forward are: * Get back to twrtp patches in Gerrit: implement the next round of changes per last round of review, and hopefully get twrtp into libosmo-netif so we can make it an option in OsmoBTS, in addition to E1 BTS. * Finish long-deferred work on libgsmhr1 in gsm-codec-lib. HRv1 codec is of course of no practical interest, can be regarded as a "just for fun" retronetworking feature, but I need to finish it so certain ThemWi components can rely on having encoders and decoders for all GSM codecs always available, and my TFO transform for HRv1 will serve as a stepping stone toward much more important TFO transform for EFR. * After the above, the big work item for me will be ThemWi-MSC. I won't get into details as I don't like writing about vaporware, but many of you know that currently I am still stuck on 2023-02 version of OsmoMSC while running newer versions of all other components. ThemWi-MSC will be my proper solution, but I'll write about it in detail only when it becomes a reality. Never stopping work toward restoration of top-quality GSM/2G networks, Mother Mychaela

2 weeks, 2 days

Pysim error: SW match failed

by Martin Nagy

Hi all, After buying a super Sim Kit (16 in 1) from China, I tried the reader (green PCB inside a blue transparent plastic case with a blue LED) and SIM (identified as a fakesupersim) with pysim tool. However i am getting the following error: /pySim-prog.py -n 26C3 -c 49 -x 262 -y 42 -z 1234 -j 1 -t auto Insert card now (or CTRL-C to cancel) Autodetected card type fakemagicsim Generated card parameters : > Name : 26C3 > SMSP : e1ffffffffffffffffffffffff058100945555ffffffffffff000000 > ICCID : 8949262427518313026 > MCC/MNC : 262/42 > IMSI : 262422461512085 > Ki : 7b74741a1ee14337ec23f9ab92a13648 > OPC : ccd867d60797d8d45354a51b3ef568ff Programming ... Traceback (most recent call last): File "./pySim-prog.py", line 530, in <module> card.program(cp) File "/home/nadicek/pysim/pysim/pySim/cards.py", line 231, in program self._scc.update_binary('6f30', hplmn + 'ff' * (tl-3)) File "/home/nadicek/pysim/pysim/pySim/commands.py", line 53, in update_binary return self._tp.send_apdu_checksw(pdu) File "/home/nadicek/pysim/pysim/pySim/transport/__init__.py", line 87, in send_apdu_checksw raise RuntimeError("SW match failed ! Expected %s and got %s." % (sw.lower(), rv[1])) RuntimeError: SW match failed ! Expected 9000 and got 9804. I checked mailing lists and haven’t found anybody who had similar problem with pysim. Also I have tried forcing different models of SIM, but nothing is working. Obviously I can remove this check from the script file (__init__.py in /pySim/transport), however somebody had a reason to put such condition there. I would like to ask if it is safe to remove that line of code and the purpose of that line of code. Thanks a lot and best regards Martin

1 month

Become a CSPAI – Certified Security Professional in Artificial Intelligence

by frederickgragg＠gmail.com

In today's fast-evolving digital landscape, artificial intelligence (AI) is revolutionizing every sector — from finance and healthcare to defense and infrastructure. But with innovation comes risk. As AI systems grow in complexity, so do the threats they face. Malicious actors are exploiting vulnerabilities in AI algorithms, datasets, and decision-making processes, creating unprecedented challenges in cybersecurity. The https://www.dumpsmate.com/CSPAI-exam.html (Certified Security Professional in Artificial Intelligence) certification is your gateway to becoming a global leader in AI security. Designed by industry experts and aligned with international standards, CSPAI empowers professionals with the specialized knowledge, practical skills, and strategic insight needed to secure AI-powered systems against evolving threats. Whether you're a cybersecurity expert looking to expand into AI, or an AI practitioner responsible for securing your models and infrastructure, CSPAI equips you with the tools to defend the next generation of intelligent technologies. What You’ll Learn The CSPAI certification curriculum covers a comprehensive range of domains, including: Foundations of AI Security: Understand the unique attack surfaces and vulnerabilities in machine learning models and AI architectures. Adversarial Machine Learning: Learn how to detect, mitigate, and prevent adversarial attacks targeting AI algorithms. AI Governance & Ethics: Master the frameworks for responsible AI, compliance, and trust-building. AI in Offensive & Defensive Cybersecurity: Explore how AI is used in threat detection, penetration testing, and cyber defense. Secure AI Development Lifecycle (SAI-DLC): Integrate security from data collection to model deployment. Why Choose CSPAI? Industry-Relevant: Stay ahead of the curve with a certification built by leading AI security professionals. Hands-On Training: Engage in labs, case studies, and real-world simulations to apply your skills in practice. Globally Recognized: Boost your credibility with a credential respected across industries and governments. Career Advantage: Open doors to high-demand roles such as AI Security Engineer, AI Risk Analyst, and AI Compliance Officer. Who Should Enroll? Cybersecurity Professionals AI/ML Engineers IT Risk & Compliance Officers Security Architects Government & Defense Personnel Anyone seeking to specialize in securing AI systems Secure the Future. Advance Your Career. In a world increasingly powered by artificial intelligence, the need for AI-aware cybersecurity professionals is not just growing — it’s critical. With the CSPAI certification, you don’t just keep up with the future. You secure it.

1 month

Unlock Your HR Potential with the C_BCHCM_2502 SAP Certified Associate Certification

by frederickgragg＠gmail.com

In the rapidly evolving world of Human Capital Management (HCM), staying ahead means understanding the powerful synergy between on-premise SAP Business Suite and cloud-based SAP SuccessFactors. The C_BCHCM_2502 – SAP Certified Associate: Positioning SAP Business Suite to SAP SuccessFactors HCM Solutions certification empowers professionals with the essential knowledge to guide organizations through their HR digital transformation journey. What is the C_BCHCM_2502 Certification? The C_BCHCM_2502 certification validates foundational skills in aligning SAP’s on-premise HCM solutions with the SAP SuccessFactors suite. Tailored for consultants, HR specialists, and IT professionals, this credential confirms your ability to strategically position and transition core HR processes from traditional SAP ERP systems to modern, cloud-based SuccessFactors environments. Why Choose This SAP HCM Certification? As businesses increasingly shift from legacy systems to cloud-first strategies, the demand for professionals who can bridge the gap between SAP Business Suite and SuccessFactors continues to grow. The https://www.dumpsmate.com/C_BCHCM_2502-exam.html certification enables you to: Understand SAP HCM architecture: Gain clarity on SAP ERP Human Capital Management components and how they relate to SuccessFactors modules. Position SAP SuccessFactors effectively: Learn how to position cloud HCM solutions to meet diverse business needs, including Core HR, Payroll, Talent Management, and Workforce Analytics. Support hybrid scenarios: Understand integration paths, data migration strategies, and hybrid deployment models. Drive digital HR transformations: Become a key advisor in enabling organizational change through cloud adoption. Key Topics Covered Overview of SAP Business Suite and SAP HCM Introduction to SAP SuccessFactors solutions Transition strategies: on-premise to cloud Hybrid HCM deployment models Integration tools and migration paths Business drivers for cloud transformation Who Should Get Certified? The C_BCHCM_2502 exam is ideal for: SAP HCM consultants HR solution architects SAP SuccessFactors professionals IT managers overseeing HR system landscapes Business transformation consultants Career Advantages Earning this certification helps you stand out in a competitive job market. Certified professionals are recognized as trusted advisors capable of steering clients and employers through complex HCM transitions. This skillset is in high demand across industries undergoing digital HR transformation. Prepare for Success SAP provides official training courses, sample questions, and learning journeys to help you prepare for the C_BCHCM_2502 exam. Combining hands-on experience with guided learning is key to certification success. Take the Next Step in Your HR Tech Career The C_BCHCM_2502 certification is your gateway to mastering SAP’s HCM evolution. Whether you’re transitioning from SAP ERP HCM or expanding your cloud capabilities with SuccessFactors, this certification positions you for growth and success in the HR technology space.

1 month

Advance Your Career with C_BCSBN_2502 – SAP Certified Associate: Positioning SAP Business Suite via SAP Supply Chain Management Solutions

by frederickgragg＠gmail.com

In today’s fast-paced digital economy, supply chain efficiency is more than just a competitive advantage—it’s a business imperative. As enterprises strive to optimize operations and enhance collaboration across global networks, professionals with proven expertise in SAP Supply Chain Management (SCM) are in high demand. The C_BCSBN_2502 SAP Certified Associate certification validates your ability to position and leverage the SAP Business Suite to streamline supply chain processes, improve responsiveness, and drive intelligent decision-making. What Is the C_BCSBN_2502 Certification? The C_BCSBN_2502 certification is tailored for business consultants, solution architects, and professionals seeking to demonstrate foundational knowledge of SAP SCM and how it integrates within the broader SAP Business Suite. This certification ensures that candidates understand key SAP SCM components and can effectively position them to meet business goals. Through this certification, you’ll gain the ability to: Understand core capabilities of SAP SCM solutions such as SAP APO, SAP EWM, SAP TM, and SAP IBP. Identify business scenarios where SAP SCM adds strategic value. Align SAP solutions with business requirements across industries. Present SAP Business Suite as a comprehensive platform for supply chain optimization. Why Get Certified? SAP remains a global leader in enterprise resource planning (ERP) and supply chain solutions. Earning the C_BCSBN_2502 certification not only validates your knowledge but also strengthens your credibility in the SAP ecosystem. Certified professionals are better equipped to support digital transformation initiatives, communicate value to stakeholders, and contribute to end-to-end process improvements. Whether you're part of an SAP implementation team or working in a strategic consulting role, this certification acts as a key differentiator, proving your capability to bridge technical solutions with business needs. Target Audience This certification is ideal for: SAP consultants involved in supply chain implementations Pre-sales and solution architects positioning SAP SCM to clients Business analysts and IT professionals in supply chain roles Professionals aiming to build a career in SAP solution consulting Prepare for Success To succeed in the https://www.dumpsmate.com/C_BCSBN_2502-exam.html candidates should familiarize themselves with SAP’s supply chain modules, study customer case studies, and understand SAP’s integration strategy within the Business Suite. SAP Learning Hub, openSAP courses, and official SAP training are valuable resources.

1 month

Love Beyond Memories

by frederickgragg＠gmail.com

Love is not just a fleeting moment caught in a photograph or a soft whisper carried away by time. It is the echo that lives on, long after the moment has passed—enduring, unshaken, and infinite. "Love Beyond Memories" is more than a phrase. It’s a feeling, a promise, a journey that stretches past the borders of time and space, holding strong even when the world around us changes. In every heartbeat, there is a memory. In every memory, a trace of love. But what happens when the memories begin to fade? When the laughter grows quieter, and the faces blur with time? That’s when true love reveals itself—not in the clinging to the past, but in the strength to carry it forward. Love Beyond Memories means living with the presence of love even when the moments are gone. It’s knowing that the ones we’ve loved, the ones we’ve lost, and the ones we hold close have left an indelible mark on our souls. Whether it’s the touch of a hand, the sound of a familiar song, or a scent that brings the past rushing back—these are not just memories. They are pieces of a love that never died. They are testaments to connection, to bonds that don’t break, even when life takes unexpected turns. https://beyond-memories.com/ speaks to the eternal nature of connection. It is for those who have loved deeply and lost, for those who cherish the little things, and for those who believe that love doesn’t end—it transforms. It lingers in the quiet moments, in the stories we tell, in the eyes of our children, and in the legacy we build. Whether you are commemorating a loved one, celebrating a lifelong partnership, or embracing a new chapter shaped by past joys and sorrows, Love Beyond Memories is a celebration of love that lives on. It reminds us that while time moves forward, love stays with us—quiet, constant, unwavering. Let this be your reminder: every moment you have loved, you have created something eternal. A memory, yes—but also a truth, a light, a legacy. Love doesn’t stop where memory fades. It goes beyond.

1 month

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