[Help needed] Testing OpenBSC without hardware BTS

Hello, I just started on OpenBSC. I would really like to test it without a hardware BTS. I'm aware that there's a smalltalk "FakeBTS" program for testing it but I did not manage to run it due to a runtime problem with libgnu-smalltalk version 3.2.91 which was listed as a requirement to run FakeBTS. As lower stable version of libgnu-smalltalk wouldn't work there's nothing I could do. I include the error message below just in case. ------------------- openbts@ubuntuopenbts:~$ gst "Global garbage collection... done" "Global garbage collection... done" /usr/share/gnu-smalltalk/kernel/SysDict.st:37: Aborted /usr/share/gnu-smalltalk/kernel/SysDict.st:37: Error occurred while not in byte code interpreter!! /usr/lib/libgst.so.7 (+0x67cef) [0xb7748cef] [0xb77af400] [0xb77af424] ... Aborted -------------------- Anyway, what I want to achieve as a start is to emulate some phone calls and trace how calls are routed through the different entities. (It's for demonstration purpose and personal interest) Would that be possible with maybe some coding? I would appreciate any suggestion on how to start. Thanks in advance! Kornschnok