Hey, I am trying to set up test bench for base-band fuzzing using the Osmocom stack and a couple of SDRs (b210 and bladerf). I have managed to setup everything to my liking in terms of a functional network using the tutorial (https://osmocom.org/projects/cellular-infrastructure/wiki/Osmocom_Network_In...) and the latest stable packages from https://osmocom.org/projects/cellular-infrastructure/wiki/Latest_Builds Now I want to enable the silent_call functionality to begin testing but I can't seem able to do so. I have reverted the silent_call patch (https://gerrit.osmocom.org/#/c/openbsc/+/1930/) for OpenBSC inside the "new" OsmoMSC but unfortunately that did not work. I have then started trying to figure out how the silent_call interacts with the rest of the state machine, but I don't seem to be making much progress. Please see attached a log for the communication between OsmoMSC (which triggers silent_call) and OsmoBSC. The connection seems to fail due to issues related to either "Congestion" (if GPRS is enabled) or a timeout of T0 (if GPRS is disabled). Can anyone help? Thanks -- Mihai