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Refik Hadzialic refikthesis at googlemail.comHi Alexander & Holger, thank you for the link, I will bookmark it, and sorry for the same message. Thank you for the help Holger, I will look at it this week, I might have then a few more questions. Best regards, Refik On Wed, Apr 4, 2012 at 6:38 PM, Holger Hans Peter Freyther <holger at freyther.de> wrote: > On 04/04/2012 04:40 PM, Refik Hadzialic wrote: >> Dear group members, > > Hi Refik, > > osmo-nitb (libmsc/) keeps a channel open by "reference" counting. This > counting is implemented by the 'transaction' or 'operations'. See > gsm_subscriber_connection for 'operation' pointers. > > So what roughly happens is: > 1.) A channel is opened, a dummy operation is created to not immediately close > the channel > 2.) Whoever feels responsible creates an operation/transaction.. > 3.) When a transaction is done msc_release_connection is called.. > 4.) when all transactions and operations are completed the channel will be > released. > > You would probably want to add a new operation >