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Holger Hans Peter Freyther holger at freyther.deOn 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