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Refik Hadzialic refikthesis at googlemail.comHi Holger, I did what you suggested (at least I think I did), I recreated the silent call with different variable names in gsm_subscriber_connection and I added the release checks in msc_release_connection in libmsc/osmo_msc.c for the RRLP transaction, thank you for guiding me! However, I have one more question regarding the connection, it gets always disconnected after some time. When I create the connection e.q. by typing in the terminal "subscriber id 1 silent-call start sdcch", and my request is being sent out (RRLP request) in the function: static int paging_cb_silent in libmsc/silent_call.c in "case GSM_PAGING_SUCCEEDED:", between the following two lines: "osmo_signal_dispatch(SS_SCALL, S_SCALL_SUCCESS, &sigdata);" and "break;" (between these two lines I send the request out). If the cell phone has the GPS coordinates cached, it returns them back, if not it tries to get a fix, but no matter in which of the two states it is, it disconnects me after 30 seconds after executing the above command in the telnet window. I get the following output after 22-23 seconds: <0000> abis_rsl.c:1517 (bts=0,trx=0,ts=0,ss=0) SAPI=0 RELEASE INDICATION <0004> abis_rsl.c:1478 rsl_handle_release and then a few seconds later (around 5-8 seconds): <0004> abis_rsl.c:891 (bts=0,trx=0,ts=0,ss=0) CONNECTION FAIL: RELEASING CAUSE=0x01(Radio Link Failure) <0004> abis_rsl.c:621 (bts=0,trx=0,ts=0,ss=0) RF Channel Release CMD due error 1 <0004> abis_rsl.c:658 (bts=0,trx=0,ts=0,ss=0) RF CHANNEL RELEASE ACK <0000> chan_alloc.c:303 Freeing lchan with state RELEASE DUE ERROR - setting to NONE and it doesn't enter the function: void msc_release_connection in libmsc/osmo_msc.c since I output a comment in the log file when it is in there! Do you have an idea, what I might be doing wrong? I get the same behavior even if I comment out the RRLP request sending (so just normal silent call). Once I finish and get it to work, I will make a wiki page so it can help other users. Best regards, Refik Hadzialic On Sun, Apr 8, 2012 at 4:19 PM, Holger Hans Peter Freyther <holger at freyther.de> wrote: > On 04/08/2012 02:53 PM, Refik Hadzialic wrote: >> Hi 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. > > Hi, > > technical questions are more than welcome. Feel encouraged to update the wiki > or submit a patch for the doc/*.txt files. > > holger > >