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Alexander Huemer alexander.huemer at xx.vuhttp://openbsc.osmocom.org/trac/wiki/GSMStandards On Wed, Jul 06, 2011 at 05:28:31PM +0400, Sergey wrote: > Hello, everyone! > > I've got c123-compatible phone, the firmware is running and that's really cool. > Testing branch even sometimes says that a call has been released, but it doesn't seem to reach the target (no ringing). > I would like to debug and maybe contribute, but... > > But here is a problem: I don't understand GSM and can't find reasonable documents to read. > I've looked through a book on gsm "GSM and Personal Communications Handbook", but it doesn't seem to provide enough info. > Specifications of GSM I found at http://www.3gpp.org/specification-numbering are too plentiful. > > Could you please advise some books to understand the protocols? > Or could you tell me where to look for specifications and which should be read first (an what to be read at all) ? >