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4317 discussions

osmoSTP association establishment
by Madarassy László 25 Jun '21

25 Jun '21

Hi Devs, I have successfully compiled and integrated osmoSTP with our product. I have a question regarding to assotiaction establishment: Currently we'll initiate the associtation establishment from our product and STP will reply to our INIT message. Is it possible to start the establishment from STP side? I haven't found any cli command/configuration for this. Thanks, Laszlo

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Help on reading values of ISIM
by 程子帅 23 Jun '21

23 Jun '21

Dear Osmocom community, I am using pysim to read values of ISIM. However, it just returns "None, None". And the aids of my SIM card is ['a0000000871002ff86ffff89ffffffff']. It seems does not have ISIM application on my SIM card. How should I read values of ISIM? Best regards, Zishuai CHENG

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Announcement of "OsmoDevCall" on June 11, 2021
by Harald Welte 08 Jun '21

08 Jun '21

Dear Osmocom community, It's my pleasure to announce the next OsmoDevCall at June 11, 2021 at 20:00 CEST at https://meeting4.franken.de/b/har-xbc-bsx-wvs This meeting will have the following schedule: 20:00 meet + greet 20:15 presentation by keith: "Screen Sharing peek at TIC A.C. infrastructure in Oaxaca" 21:00 USSE: unstructured supplementary social event [*] 22:00 close of call TIC A.C. is an operator of Osmocom based community cellular networks in indigenous communities of the Mexican state of Oaxaca. Keith works with Rhizomatica and TIC A.C. and will give us some live insight into how they operate Attendance is free of charge and open to anyone with an interest in Osmocom. 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 on Friday. 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)

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PySim-shell: File not found errors
by bryan coxwell 07 Jun '21

07 Jun '21

Hi all, I'm using pySim-Shell with a SysmoISIM-SJA2 as well as a SysmoUSIM-SJS1 and on both cards I get quite a few "File not found" errors trying to access different EFs. I'll use EF.NCP-IP as an example to illustrate the issue I'm having below. My initial steps when I plug in the card are as follows: 1) ./pySim-shell -p0 2) verify_adm <adm1 key> 3) select ADF.USIM Now when I run "dir" in ADF.USIM it lists a number of EFs I'm interested in, including EF.NCP-IP. Since this requires service number 80 to be available in EF.UST, I run "select EF.UST" followed by "ust_service_activate 80". This runs without issue. When I run select ADF.USIM now followed by select EF.NCP-IP, the card returns a "File not found" error. So my questions are: Is this file not supported on the SJA2 and SJS1? Is there a way for me to add those files to ADF.USIM? Is there a list of the known supported EFs of the SJA2 and SJS1? I looked and couldn't find anything. Thank you in advance!

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No ISIM application on SysmoISIM-SJA2?
by bryan coxwell 06 Jun '21

06 Jun '21

Hi all, I feel like I may be missing something about how SIM cards work here, but I’m unable to figure out how to load the ISIM application on my SysmoISIM-SJA2s, so I’m reaching out here for some help. I started with pySim-shell and listed the directories under the MF directory and it shows only ADF.USIM, so I decided to use shadysim_isim.py to list out the applications on the card and was shown this: AID: a0000000620001, State: 01, Privs: 00 AID: 4a6176656c696e2e6a637265, State: 01, Privs: 00 AID: a0000000620101, State: 01, Privs: 00 AID: a0000000620102, State: 01, Privs: 00 AID: a0000000620201, State: 01, Privs: 00 AID: a000000062020801, State: 01, Privs: 00 AID: a00000006202080101, State: 01, Privs: 00 AID: a0000000620002, State: 01, Privs: 00 AID: a0000000620003, State: 01, Privs: 00 AID: a000000062010101, State: 01, Privs: 00 AID: a00000015100, State: 01, Privs: 00 AID: a0000000090005ffffffff8911000000, State: 01, Privs: 00 AID: a0000000090005ffffffff8912000000, State: 01, Privs: 00 AID: a0000000090005ffffffff8913000000, State: 01, Privs: 00 AID: a0000000090005ffffffff8911010000, State: 01, Privs: 00 AID: a0000000871005ffffffff8913100000, State: 01, Privs: 00 AID: a0000000871005ffffffff8913200000, State: 01, Privs: 00 AID: a0000000090003ffffffff8910710001, State: 01, Privs: 00 AID: a0000000090003ffffffff8910710002, State: 01, Privs: 00 AID: a0000000090005ffffffff8915000000, State: 01, Privs: 00 AID: a00000015141434c, State: 01, Privs: 00 Instance AID: a00000015141434c00 The SysmoUSIM/ISIM manual pointed me to Annex E of 3GPP 101.220 which says the prefix of the ISIM application is A00..00871004. So my questions are: Am I missing something and the app is installed? If not, is there a way to load and install the ISIM application? Thanks in advance everyone.

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Issue with LimeSDR Mini
by Akib Sayyed 06 Jun '21

06 Jun '21

Dear List I am trying to use latest Osmo-core suite (osmo:stp,hlr,msc,bsc,bts,mgw) with limesdr mini but facing issue as soon power rampup starts. is there any stable release which I can use with limesdr mini -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

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LCLS and osmo-sip-connector
by Keith 28 May '21

28 May '21

Hi all. I would like to implement some functionality that existed as a kind of happy accident?, in the osmocom-nitb That is - that media endpoints in INVITEs/200s and re-INVITEs from a SIP UA to osmo-sip-connector just ended up being transparently communicated to osmo-bts. This made it really easy to take the pbx out of the audio stream. I wanted to share where I am at with that. freeswitch even has a console command for this: "uuid_media" can switch the pbx in and out of the stream during the call. In the case of a MS to MS call on the same bts, we just connect the two osmo-bts media endpoints to each other. Freeswitch can schedule to playback message on calls and such like - for "your credit ran out" message for example - and it works pretty good. FS knows to put itself back into the stream with a re-INVITE with it's own IP in the SDP before playing the audio and invites itself back out of the stream as soon as playback is finished. I've been looking on and off, not that I've given it a huge amount of time, at how to replicate this with the BSC/MSC/MGW/SIP combination. First thing was to fix up the BSS messages and Global Call Reference generation. (TS 23.284) Given that Max had done most of this, that's pretty easy, although I got lost at one point down a rabbit hole of trying to figure out more than I needed to with the FSM and BSS messages, and that put me off working on it for a while. Anyway, https://gerrit.osmocom.org/c/osmo-msc/+/24236 exists and "works" - that is you can do LCLS with either mgw-loop or bts-loop configured on the BSC - but only for the internal mncc, obviously as the osmo-sip-connector still does not know what to do with the GCR (global call reference) I thought about various hackish things to do. (maintain a table of call-ids and their gcr on the sip conn and add an X-Osmo-CallID header to the SIP) but I've also been looking at the specs. TS 29.164 (section 6) says that the GCR should be encapsulated in a binary encoded ISUP payload, there are pointers in the spec to ITU Q.1912.5 (Section5 and thereabouts) So the ISUP messages should be added to SIP messages, requiring a multipart MIME attachment to the INVITE with the SDP and the ISUP. Also see RFC3204 What I don't know is how sip UEs will respond to these. I wonder will they decode them, I doubt it, some searching for SIP-I support in FreeSwitch confirms no support. So I'm thinking that I need to serialise the GCR and add it to an "X-" SIP header, so we at get it back on the B-leg. So yes, I need to just do this, but I got stalled a bit again with my lack on programming skills trying to learn how to serialise the GCR the "right" way. - but once I figure that out, then I can at least test what happens and see how the MSC and MGW behaves with the MNCC messages that result from SIP re-INVITES. Maybe that just works, but I don't think so, I think I will need to implement more BSS LCLS messages to actually change the LCLS states, not just update media endpoints. Sometimes I wonder here what should happen in the sip conn and what in the MSC. Anyway, It's been on my mind to write this up quickly to the ML just in case somebody has a "OH... better not do it like that" type comment.. Thanks k.

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Announcement of "OsmoDevCall" on May 28, 2021
by Harald Welte 27 May '21

27 May '21

Dear Osmocom community, It's my pleasure to announce the next OsmoDevCall at May 28, 2021 at 20:00 CEST at https://meeting4.franken.de/b/har-xbc-bsx-wvs This meeting will have the following schedule: 20:00 meet + greet 20:15 presentation by fixeria: "Hacking binary protocols with Pycrate" 21:00 USSE: unstructured supplementary social event [*] 22:00 close of call Attendance is free of charge and open to anyone with an interest in Osmocom. 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 on Friday. 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)

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Asking about Modification for USSD RESP
by Radiarisainana Sitraka 18 May '21

18 May '21

Hello, When the phone send *#100#, the ussd responds with "the extension is xxxx" and it gives option to accept after this like button "ok". My question is it possible to perform this response of ussd for two options "reply" and "cancel" and the phone could reply the answer of the network? Chears,

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Announcement of "OsmoDevCall" on May 14, 2021
by Harald Welte 13 May '21

13 May '21

Dear Osmocom community, It's my pleasure to announce the next OsmoDevCall at May 14, 2021 at 20:00 CEST at https://meeting4.franken.de/b/har-xbc-bsx-wvs This meeting will have the following schedule: 20:00 meet + greet 20:15 presentation by laforge: "SS7 and SIGTRAN in 2G/3G networks" 21:00 USSE: unstructured supplementary social event [*] 22:00 close of call Presentation Abstract: This talk will cover some classic circuit-switched SS7 basics as well as SIGTRAN (SS7 over IP) and how this is used as underlying transport for a variety of interfaces in the 2G (GSM) and 3G (UMTS) cellular networks even today. Attendance is free of charge and open to anyone with an interest in Osmocom. 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 on Friday. 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)

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