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Borjan Jovanovski jovanovskiborjan at gmail.comHello, yes i also have this document, it id the exact device i am talking about, and it is that exact same protocol and way of function. Now if only someone could implement this as a feature. On Sun, Jun 3, 2018, 10:43 Labs <rp.labs at gmx.ch> wrote: > Hello, > > I found this document on the net: > > https://www.academia.edu/19659583/Documents_mx_zxsdr-bs8900-gu360v40921-outdoor-gsm-umts-dual-mode-macro-node-b-system-description > > For Abis when using the ethernet port it is using SCTP for control plane > messages and after encapsulated in IP and for user plane it is using RTP > and then encapsulated in UDP. > > There is no clear document for Huawei multi-standard boxes but I know that > for Abis over IP you need to define IPPATH which is probably SCTP to > provide dual-homing feature. > > Regards, > R. > > Sent from my Mobile > > On 02.06.2018, at 15:08, Borjan Jovanovski <jovanovskiborjan at gmail.com> > wrote: > > Further clarification: Regarding my initial mixup of standard iub / abis, > it was because of this, when i first met the problem i googled for a > solution and ran into this: > > https://osqa-ask.wireshark.org/questions/23531/abis-over-iua-decoding > > it was actually abis over IuA. > > > On Sat, Jun 2, 2018, 14:57 Borjan Jovanovski <jovanovskiborjan at gmail.com> > wrote: > >> Hi Harald, >> >> We are talking about a ZTE MacroBTS ZXSDR BS8900A. >> >> And about your further questions, your final statement is correct it is >> standard abis dialect encapsulated in SCTP, i can provide documentation at >> a later time as i am not home at the moment, but i can tell you now that, >> the SCTP protocol is terminated in a switch type device before the bsc >> hardware, and then further communication continues over tcp to the bsc. >> Regards, >> Borjan >> >> On Sat, Jun 2, 2018, 14:50 Harald Welte <laforge at gnumonks.org> wrote: >> >>> Hi Borjan, >>> >>> On Sat, Jun 02, 2018 at 02:15:38PM +0200, Borjan Jovanovski wrote: >>> >>> > my device is a multimode device BTS NodeB and eNodeB 2G + 3G + 4G and >>> > uses SCTP protocol for BSC RNC and MME connection >>> >>> Can you tell us more about that device? >>> >>> > ... but i couldn't get OpenBSC to work with abis over sctp. So my >>> final question is: >>> > How to handle Abis over SCTP with OpenBSC. >>> >>> To the best of my knowledge, there is no 3GPP specification for Abis >>> over SCTP. >>> >>> As such, it's not a surprise that we're not implementing it in OsmoBSC :) >>> Maybe I missed something. Can you please point me to relevant >>> specification for this Abis dialect? >>> >>> I would assume it's some vendor-specific dialect. Do you have >>> protocol-level >>> documentation for that available? Do you have protocol traces of this >>> dialect? >>> >>> In any case, even with documentation and/or traces, you would need to >>> develop the respective code to interface this new Abis >>> dialect/encapsulation. The required effort depends on how far that >>> dialect diverges from the existing "known" dialects/formats. If it's >>> just 08.58 RSL and 12.21 OML inside SCTP, then it should be rather >>> little effort. But that's a big "if" :) >>> >>> Regards, >>> Harald >>> -- >>> - Harald Welte <laforge at gnumonks.org> >>> http://laforge.gnumonks.org/ >>> >>> ============================================================================ >>> "Privacy in residential applications is a desirable marketing option." >>> (ETSI EN 300 175-7 Ch. >>> A6) >>> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/openbsc/attachments/20180603/10be8d54/attachment.htm>