gsm specifications

Alexander Huemer alexander.huemer at
Wed Jul 6 14:28:34 UTC 2011

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 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) ?

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