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Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Holger Adams 28 Mar '09

28 Mar '09

Hello Everybody, my E-1 link now seems to work correctly. at least I can see the LAPD RR-PingPong on my analyzer. First Problem: I'm still having some problems with bs11_config, this happens with create-trx1 and delete-trx1. If I remember right, this already have been reported by somebody else. I first disconnected the BTS from the BSC with 'bs11_config disconnect'. openbsc:/svn/trunk/openbsc/src# ./bs11_config delete-trx1 bs11_config (C) 2009 by Harald Welte and Dieter Spaar This is FREE SOFTWARE with ABSOLUTELY NO WARRANTY LMT LOGON: ACK PHASE: 2 Maintenance MBCCU0: No Load MBCCU1: Load Abis-link: Down Wed Mar 18 15:24:51 2009 <0020> abis_nm.c:689 BS11 DELETE OBJECT NACK Wed Mar 18 15:24:51 2009 <0020> abis_nm.c:689 BS11 DELETE OBJECT NACK LMT LOGOFF: ACK (same for create-trx1). ~ Second problem: openbsc:/svn/trunk/openbsc/src# ./bsc_hack -a -f 123 Allowing everyone? DB: Database initialized. DB: Database prepared. 1 device found id: 0 Dprotocols: 00000018 Bprotocols: 0000000e protocol: 4 nrbchan: 30 name: hfc-e1.1 activate bchan bootstrapping OML Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=0) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=1) E1=(0,2,1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=2) E1=(0,2,2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=3) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=3) E1=(0,2,3) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=4) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=4) E1=(0,3,0) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=5) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=5) E1=(0,3,1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=6) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=6) E1=(0,3,2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=7) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=7) E1=(0,3,3) bootstrapping RSL MCC=1 MNC=1 bootstrapping OML Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=0) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=1) E1=(0,2,1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=2) E1=(0,2,2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=3) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=3) E1=(0,2,3) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=4) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=4) E1=(0,3,0) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=5) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=5) E1=(0,3,1) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=6) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=6) E1=(0,3,2) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1405 Set Chan Attr (bts=0,trx=0,ts=7) Wed Mar 18 15:23:37 2009 <0020> abis_nm.c:1344 CONNECT TERR TRAF Um=(bts=0,trx=0,ts=7) E1=(0,3,3) (...) 'bsc_hack' hangs here, can't get more - even with verbose settings. Sometimes I get something like a 'Failure Event' (can't remember excact message) and 'RADIO ... DISABLED'. I don't have loggings of these, Sorry. Have I missed something? Best Regards, Holger

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Re: Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Dieter Spaar 25 Mar '09

25 Mar '09

Hello Harald, On Mon, 23 Mar 2009 15:05:09 -0300, "Harald Welte" <laforge(a)gnumonks.org> wrote: > > yes, DELETE OBJECT is currently not working in bs11_config. I or somebody else > with LMT (Dieter?) need to look at a LMT when deleting an object and compare > the binary data with what bs11_config generates in order to check for differences > and fix them. I think the DELETE OBJECT message is fine, the problem is that an object has to be locked before it can be deleted. This is how locking/unlocking looks in LMT (its basically the CHG_ADM_STATE message): ; Lock BBSIG 1 Tx 69A50200010401 Rx 61A5020001040124010701071C0100 Rx 6AA50200010401 ; Lock PA 1 Tx 69A50900010401 Rx 61A5090001040124010701071C0100 Rx 6AA50900010401 ; Unlock PA 1 Tx 69A50900010402 Rx 61A5090001040224010701071C0100 Rx 6AA50900010402 ; Unlock BBSIG 1 Tx 69A50200010402 Rx 61A5020001040224010701071C0100 Rx 6AA50200010402 After the object is locked, it can be deleted: ; Delete BBSIG 1 Tx ACA5020001 Rx ADA5020001 Please note that locking for deleting is enough, unlocking the deleted object is of course not needed. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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BTS connections
by Eric Cathelinaud 23 Mar '09

23 Mar '09

Hello everybody, I would like to know whether it would be possible to obtain some information about the cable connection. It is written on the website that the Y03 and Y04 PCM are left open, but I can see on the photo http://bs11-abis.gnumonks.org/trac/attachment/wiki/BS11_Configuration/bs11_… that there is a twinax cable between them. Am I wrong? If not, I would like to know what's the use of this connection. Thanks a lot Eric

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Re: Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Dieter Spaar 23 Mar '09

23 Mar '09

Hello Holger, On Thu, 19 Mar 2009 17:25:15 +0100, "Holger Adams" <holger(a)kernreaktor.org> wrote: > > I remember that one TRX wasn't ('No Load') loaded. Phase 3 was reached. If this is the first one, it won't work because this is the one OpenBSC uses in the moment. If it is not loaded you should switch off and on the BS-11 and check if it works afterwards. On my BS-11 there seems to be a temperature related problem which sometimes requires quite a few restarts to get the first TRX loaded. Additionally it could be that an attached RS232 cable disturbs the startup process. All of the above is not 100% sure because its difficult to reproduce, but maybe it helps to load the first TRX (if the second TRX is not loaded this should be no problem to get OpenBSC running). Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Re: Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Dieter Spaar 23 Mar '09

23 Mar '09

Hello Holger, On Mon, 23 Mar 2009 09:13:00 +0100 (CET), "Holger Adams" <holger(a)kernreaktor.org> wrote: > > There are still some problems of getting the TRX started (sorry for keep > bugging, but it doesn't make real fun to start developing without a > working fundament). I don't see a problem with the traces, what you receive is the "Channel Load" Indication from the BS-11, OpenBSC advices the BS-11 to send this report. > I except of beeing 'DoSed' by various mobilephones lying around here, but > nothing happens. I also can't see the 'OpenBSC-Test' provider on my > mobilephones (manual network select). A phone normally won't register to the test network as long as it reaches the network stored on the SIM. You should see the network "001-01" if you manually search for a network (it could also be "Test01" or similar), but not the name 'OpenBSC-Test'. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Re: Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Dieter Spaar 19 Mar '09

19 Mar '09

Hello Holger, On Thu, 19 Mar 2009 14:32:48 +0100 (CET), "Holger Adams" <holger(a)kernreaktor.org> wrote: > > The programm stucks at 'TX TEI(1): 10 1a 1e 06 0b 00 0b 06 1e 00 01 00 f1 > 10 00 01 28 ff' but continues playing LAPD-RR-Pingpong. Should I try to > reflash the firmware? I also tried restarting 'openbsc' a few times. > Does bs11_config show that both TRX are loaded and that the BS-11 is in Phase 3 ? Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Re: Problems with bs11_config ('BS11 DELETE OBJECT NACK') and bsc_hack
by Dieter Spaar 19 Mar '09

19 Mar '09

Hello Holger, On Thu, 19 Mar 2009 11:02:05 +0100 (CET), "Holger Adams" <holger(a)kernreaktor.org> wrote: > > Sniffed Abis-Link (with K1103): > http://www.kernreaktor.org/stuff/bs11-e1.txt I am not familiar with the K1103. But if I don't misunderstand the traces, everything should be fine. After the database has been sent to the BS-11, you won't see any additional traffic on the E1 interface as long as there is no phone registering to the BS-11 or you advice OpenBSC to send something to the BS-11. You should now be able to see the network with a phone. If you want to generate some E1 traffic without a phone, you can press (or release) the instrusion switch, this should result in a report sent from the BS-11. However I don't know how long the delay is between actually changing the switch state and the resulting report. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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Wanted: A-bis and/or Um protocol traces for GPRS
by Harald Welte 12 Mar '09

12 Mar '09

Hi! As one of our following steps in OpenBSC will be work on GPRS support, I would be interested in any GPRS related protocol traces of the A-bis interface or the Um interface. Particularly interesting obviosuly is the registration and session setup/teardown. So if anyone has such traces for GPRS, please don't hesitate to contact me. The traces will not be publicized but just used as a reference and example for the further development of OpenBSC. Thanks in advance! (yes, I'm still on holidays, but rather wrote that email immediately than to put it on a TODO list and loose time and/or forget about it) -- - Harald Welte <laforge(a)gnumonks.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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E1 interface, layer 2
by Klaus-Peter Junghanns 11 Mar '09

11 Mar '09

Hi, i am staring at the sources right now, figuring out how openbsc uses which part of misdn to send/receive frames over the e1 link. I think it's doing something like this (please correct me if i am wrong: - use timeslot 1 in hdlc mode for the signalling link - use misdns layer 2 to handle the TEI assignment, etc What i am wondering about is: - which ETSI standard describs layer 2 for GSM abis? Thanks a lot in advance for your feedback. :-) Mit freundlichen Grüßen -- best regards Klaus-Peter Junghanns -- Junghanns.NET Gesellschaft fuer Internet-Services & Software-Development mbH Breite Str. 13a 12167 Berlin Germany Geschaeftsfuehrer : Klaus-Peter Junghanns Eingetragen beim Amtsgericht Charlottenburg, HRB 79169 Finanzamt fuer Koerperschaften III, Steuernummer 29/409/8978 Umsatzsteuernummer : DE 217621658 WEEE-Reg.-Nr. DE 86102730

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Re: E1 interface, layer 2
by Dieter Spaar 10 Mar '09

10 Mar '09

Hello, On Tue, 10 Mar 2009 15:24:00 +0100, "Klaus-Peter Junghanns" <kpj(a)junghanns.net> wrote: > > What i am wondering about is: > - which ETSI standard describs layer 2 for GSM abis? As far as I am aware, its LAPD as specified by ITU Q.920 and Q.921 (very similar if not equal to what is used in the "D"-channel of ISDN). Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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