OpenBSC

openbsc@lists.osmocom.org

7 participants
4171 discussions

by tsaitgaist

I have a plethora of femtocells (small base stations) I want to get rid of. If you want it, it's yours, for free. You just need to cover the shipping costs. Else it will become the property of Trash Inc. Here the list of 3G femtocells: - Cisco residential signal box USC3331, model 74-12584-01, PID USC3331-EE-K9. The flash (TSSOP) is desoldered but in the box (just is case you need to dump it). Just resolder it and it should work fine. - 2x Vodafone (Greece) Access Gateway UAP2105. One is open, but nothing is missing. 5 pair of board to board connectors are included. This is the one first model that has been hacked. - Vodafone Sure Signal AP 2820V. A cute plug style 3G femtocell. modded for serial output and external power supply (so the serial is not mains referenced). I have doc on how to root and flash it. Sadly it misses little effort for interfacing it with osmocom, but is the best candidate for such a project. - Vodafone Sure Signal AP 2820V. not modded. - Ubiquisys ZP-000-05EU, aka SerComm. Flash is desoldered and in the packages. Serial output is available. - SFR Home 3G G2, Ubiquisys ZP-004-01FR. serial is available. This is the one I hacked and reflashed for a MitM attack back in 2011 - yet another Vodafone (Greece) Access Gateway UAP2105. already open. should work, but else perfect donor board. - SFR Home 3G G3, FEM-SER-r0. flash is desoldered and in package. Here the list of 4G femtocells: - Samsung Verizon 4G LTE Network Extender, model SLS-BU103 - 3x T-Mobile (USA) Personal 4G LTE CellSpot, 9961 Home Cell V1. one is open and has plenty of test points soldered. just let me know if you are interested.

2 years, 9 months

NanoBTS unable to connect to BSC

by Matthew H

Hi all, I have an ip.access NanoBTS 139U (Part No 139U V 139U V351800). I believe it is operating on the 1800 MHz although admittedly that's a guess from the part number. I've not found a definitive way of confirming the supported band via Telnet or otherwise. I can see the BTS attempting to connect to the BSC, but after the "Set Radio Carrier Attributes" request from the BSC, the BTS sends a NACK and the OML link is dropped. <0004> abis_nm.c:984 OC=RADIO-CARRIER(02) INST=(00,00,ff): SET RADIO ATTRIBUTE NACK CAUSE=Message cannot be performed <0004> osmo_bsc_main.c:226 Got SET RADIO ATTRIBUTE NACK going to drop the OML links. I've grabbed some debug info, note that in the PCAP the packets are wrapped in TZSP as I used a Mikrotik to stream them to Wireshark. Log from BSC - https://s3.eu-west-2.amazonaws.com/cdn.marrold.co.uk/files/osmocom/osmobsc_… PCAP - https://s3.eu-west-2.amazonaws.com/cdn.marrold.co.uk/files/osmocom/NanoBTS.… It's worth noting that ipaccess-config tool also has an issue parsing the frequency which may well be related: ipaccess-config -G 10.0.130.101 ipaccess-config (C) 2009-2010 by Harald Welte and others This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY Trying to connect to ip.access BTS 10.0.130.101... OML link established using TRX 0 getting Attributes (3): 88 91 86 rc"" 0 <0004> abis_nm.c:652 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff): Get Attributes Response: Primary OML IP is 10.0.130.111:0 <0004> abis_nm.c:658 OC=BASEBAND-TRANSCEIVER(04) INST=(00,00,ff): Get Attributes Response: Unit ID is 1800/0/0 <0004> bts.c:497 (bts=0) Unsupported frequency band. <0007> abis_nm.c:725 (bts=0) BTS config invalid, dropping BTS! <0007> bts_ipaccess_nanobts.c:624 (bts=0) Deferring Drop of OML link. <0007> input/ipaccess.c:431 Bad signalling message, sign_link returned error: Invalid argument. <0007> bts_ipaccess_nanobts.c:557 (bts=0) Dropping OML link: Deferred link drop Thanks in advance Matthew / marrold

2 years, 9 months

Running Osmocom GSM stack in Docker

by Matthew H

Hello, In the next couple of days I plan on getting started on configuring a simple Osmocom based GSM stack with all the key components, to use with a single 1800 MHz Nano BTS. Before I get too stuck in, I wanted to check if running in Docker (Straight Docker, no kubernetes etc) was feasible, and if the various packages behave when NAT etc is involved? Thanks Matthew / marrold

2 years, 9 months

OsmoDevCall on Nov 16, 2022: MS/BS power control in OsmoBSC/OsmoBTS

by Harald Welte

Dear Osmocom community, we're happy to announce the next incarnation of OsmoDevCall]]. when: November 16, 2022 at 20:00 CET where: https://meeting5.franken.de/b/har-xbc-bsx-wvs 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. This meeting will have the following schedule: 20:00 meet + greet 20:10 presentation as outlined above 21:00 unstructured supplementary social event [*] Attendance is free of charge and open to anyone with an interest in Osmocom or open source cellular technologies. More information about OsmoDevCall, including the schedule for further upcoming events can be found at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall Looking forward to meeting you soon! Best regards, Harald [*] this is how we started to call the "unstructured" part of osmocom developer conferences in the past, basically where anyone can talk about anything, no formal schedule or structure. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

2 years, 9 months

Two presentation proposals for OsmoDevCall

by Mychaela Falconia

Hello Osmocom community, Vadim (fixeria) invited me to give a presentation on some of my topics of expertise on OsmoDevCall; I have given some thought to which topics I could present on, and I have two proposals: Presentation 1: Themyscira Wireless: GSM network in sunny California. In this presentation I will describe the community GSM network I am building in my corner of the world, using Osmocom CNI software and whatever BTS hardware fits the bill, currently just one sysmoBTS. Whereas most well-known community GSM networks such as Rhizomatica have been built in areas with no commercial cellular coverage of any kind, my use case is very different: I live in an area where every square mm is blasted with super-strong 4G and 5G signals from 3 major carriers, but a community GSM network is needed in order to provide service specifically to *vintage* mobile phones, which require 2G. I will cover this unusual telos and the different design choices that stem from it, I will cover my own software that interfaces to OsmoMSC via MNCC, and I will cover my interface to USA PSTN via SIP with G.711 voice, including my own implementation of transcoding MGW. Presentation 2: Calypso chipset history and development boards, from TI to FreeCalypso. In this presentation I will cover the history of TI Calypso chipset itself (silicon and DSP revisions, ABB and RF chips), the history of TI's original support for these chips (reference fw and development boards), how various commercial Calypso device vendors changed things (very small changes in the case of Openmoko, huge changes in the case of Compal), how I entered the scene with my FreeCalypso brand, and the impact of two most recently discovered modem modules: Huawei GTM900 and iWOW TR-800. I will cover my motivations and upcoming new hardware plans, and at the end I would like to engage in a discussion on how to make FreeCalypso-suitable hw (meaning hw suitable for running full FC solution) more readily and less expensively available to interested players. I have added both of the above talk proposals to the wiki page: https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall but of course nothing is scheduled yet. Given that the schedule is booked many months in advance these days, it is now up to the community to decide what y'all are interested in, and if there is interest in both topics, which should be scheduled first. Sincerely, Lady Mychaela N. Falconia, Mother of FreeCalypso, Dame of the Order of 2G, Champion of Published Source Code

2 years, 9 months

Osmo-BTS tx-attenuation

by Justin Mark Repollo

Hi Osmocom Community, May I ask your help on this. We have a test setup with UmTrx 2.3.2 SDR. We are trying to set the tx-attenuation and measure the power output but it seems it doesn't reflect based on the defined configurations. We tried to set 0, 5, 10 as values and below are the results. [image: 0-02-03-588e9973ceef2e018e29c0b2eb576f5b7d26972bbb779b44f79c97408d360299_1c6daee34bf8ee.jpg] [image: 0-02-06-99d6d7ce8551b10be62ea130c638b19c5475b5b4140bf2843b92a5b55d36c67c_1c6daee34bfeec.jpg] Please see attached files for osmo configurations and logs. Thanks! Regards, Justin

2 years, 10 months

Osmocom binary package repository URLs have changed

by Oliver Smith

Hello various Osmocom mailing lists, as previously announced (https://osmocom.org/news/191): * 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 Best, Oliver -- - Oliver Smith <osmith(a)sysmocom.de> https://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte

2 years, 10 months

Question about Commit 47afc424c3: gprs_ns2: implement BLOCK/UNBLOCK of a NSVC by vty

by Alexander Rehbein

Hello, in the changes to `src/gb/gprs_ns2_vc_fsm.c` (see subject line), I found a few lines that puzzle me (as a newbie to the Osmocom codebase(s), they look like an error to me): ``` case GPRS_NS2_EV_REQ_OM_UNBLOCK: /* vty cmd: unblock*/ if (!priv->om_blocked) return; priv->om_blocked = false; if (fi->state == GPRS_NS2_ST_BLOCKED) osmo_fsm_inst_state_chg(fi, GPRS_NS2_ST_BLOCKED, nsi->timeout[NS_TOUT_TNS_BLOCK], 0); break; ``` To me it seems like the 'new_state' argument should be `GPRS_NS2_ST_UNBLOCKED`, since we are trying to unblock (that's what the `event` case says here from my understanding). What am I misunderstanding here? Cheers, Alex

2 years, 10 months

no calls in 2G network

by CRX

Hey, i am trying to build a 2G network with an ip.access BTS (Model 165G DCS1800). So far I can see the network on the RF spectrum and SMS delivery is working fine. Unfortunately I cant send calls to other phones. The open-bsc sends a lot of error messages to the log when the BTS is booting, I am not sure if my configuration is ok. As attachments there are my configs and the logs of open-bsc and osmo-msc. Thanks for your Help! regards crx

2 years, 10 months

OsmoDevCall on Oct 19, 2022: SIMtrace2 Tutorial

by Harald Welte

Dear Osmocom community, 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*! when: October 19, 2022 at 20:00 CEST where: https://meeting5.franken.de/b/har-xbc-bsx-wvs In this edition, I will be presenting a SIMtrace2 tutorial, showing SIM card protocol tracing, decoding with the new pySim-trace as well as the card emulation firmware. This meeting will have the following schedule: 20:00 meet + greet 20:10 presentation as outlined above 21:00 unstructured supplementary social event [*] Attendance is free of charge and open to anyone with an interest in Osmocom or open source cellular technologies. More information about OsmoDevCall, including the schedule for further upcoming events can be found at https://osmocom.org/projects/osmo-dev-con/wiki/OsmoDevCall Looking forward to meeting you soon! Best regards, Harald [*] this is how we started to call the "unstructured" part of osmocom developer conferences in the past, basically where anyone can talk about anything, no formal schedule or structure. -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

2 years, 10 months

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