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Alexander Chemeris alexander.chemeris at gmail.comHi Harald, David, Andreas, On Sun, Oct 11, 2009 at 13:19, Harald Welte <laforge at gnumonks.org> wrote: > On Sat, Oct 10, 2009 at 09:33:31PM +0400, Alexander Chemeris wrote: >> We'll bring one or two our USRPs for OpenBTS testing even if David Burgess >> won't be able to come, and we would love to be located near OpenBSC guys >> and you. But that'll be our first time at 26C3 and we're little bit >> lost - should we send some request to get the space? > > I think the process for applying for tablespace in the hackcenter has not yet > started. > > Meanwhile I've created a http://events.ccc.de/congress/2009/wiki/index.php/GSM > wiki page where we can add stuff to, similar to the 25C3 and HAR2009. Great, thank you. I'll keep my eye on it. >> Do you have an option for VoIP link rather then E1? > > As indicated, I am really not interested in this. My general interest in any > actual voice switching is extremely low. I have two objectives with regard to > OpenBSC at the 26C3: Well, question was addressed to Andreas, I know that you're not interested ;) > * operate a functional network that interconnects with the DECT network of > the POC (due to popular demand) > * do some more experimentation with security related aspects of GSM related > signalling > > I don't really see the point of having any kind of additional interfaces for > voice data at the 26C3 installation. I don't see a technical challenge there, > I think it only increases the network complexity in case something needs to be > debugged. > > Playing with the asterisk or lcr integration of OpenBSC and hooking it up to > some other VoIP-based or -gatewayed system like OpenBTS is something that can > be done at any time, at any place, by anyone who is interested in doing that. > > Please don't misunderstand me. David knows how friendly I am with regard to > OpenBTS, and that there is no sense of "competition" or anything like that. > I am very interested in technical discussions of GSM signalling, or at > interfacing OpenBSC and OpenBTS on a GSM signalling level. > > But simply passing around transcoded voice samples in a VoIP protocol between > two autonomous GSM networks is about the most boring thing I can imagine. VoIP > protocols are well understood, there are dozens of open source projecst in that > area, each with their own community. I happily let somebody else do that. > > So if Andreas and you decide you want to hook up OpenBTS and OpenBSC over VoIP, > please go ahead and do so. But this is unrelated to the 26C3 GSM network and I > expect you will interfere neither with the 26C3 GSM network, nor with the > public networks. I know that you're very much of a friend to OpenBTS rather then a competitor, and if you understood me that way, I ask for excuse. What I'm trying to achieve is to get the most from the event as I can for OpenBTS. As a first time attendee I may not get a lot of things before hand, but I definitely have no intention to break your agenda. I just think that being connected to the DECT network will give us broader testing then being self-encapsulated. And I see the worth of having integrated HLR and operating a single network rather then two separate networks. But if will render impossible, we'll be happy to be a closed unconnected network or VoIP connected one (which is already more fun for testers). PS And yes, we plan for registered-users-only network. -- Regards, Alexander Chemeris.