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David A. Burgess dburgess at jcis.netDieter - I don't know if that's valid by the spec or not, but it's part of a pretty standard configuration in IMSI-catchers: CCCH+SDCCH4 + 6*SDCCH8 + TCH/F. That maximizes location updating capacity and leaves one TCH/F for other ... mischief. Most of those IMSI-catchers are based on commercial mini/nano-BTS equipment. -- David On Dec 3, 2009, at 8:26 AM, Dieter Spaar wrote: > Hello Paul, > > On Wed, 02 Dec 2009 22:36:53 +0000, s4dd at losers.yore.ma wrote: > >> Any help you guys could give is much appreciated! > > I think the problem is the "Invalid Channel Combination!!!" > error message. Try to change "phys_chan_config" of timeslot > 1 from "SDCCH8" to "TCH/F". From my understanding of > verify_chan_comb() "SDCCH8" is not allowed on the same TRX that > already has "CCCH+SDCCH4" so I wonder why it is set in the > config file (this only applies to the BS11). Sorry, I don't > have a ready BS11 configuration at hand right now, so I can't > test it. > > Best regards, > Dieter > -- > Dieter Spaar, Germany > spaar at mirider.augusta.de David A. Burgess Kestrel Signal Processing, Inc.