#0  0x00007f5cdf04a021 in pj_atomic_get () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#1  0x00007f5cdefafb30 in pjsip_tx_data_dec_ref () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#2  0x00007f5cdefbb032 in ?? () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#3  0x00007f5cdefbb440 in ?? () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#4  0x00007f5cdefbcca6 in ?? () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#5  0x00007f5cdefbb721 in ?? () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#6  0x00007f5cdf0531c2 in pj_timer_heap_poll () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#7  0x00007f5cdefab25f in pjsip_endpt_handle_events2 () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#8  0x00007f5cdee9c4eb in ?? () from /usr/lib/python2.7/dist-packages/sipsimple/core/_core.so
No symbol table info available.
#9  0x000000000049890a in PyEval_EvalFrameEx ()
No symbol table info available.
#10 0x0000000000498602 in PyEval_EvalFrameEx ()
No symbol table info available.
#11 0x0000000000498602 in PyEval_EvalFrameEx ()
No symbol table info available.
#12 0x000000000049f1c0 in PyEval_EvalCodeEx ()
No symbol table info available.
#13 0x00000000004a8960 in ?? ()
No symbol table info available.
#14 0x00000000004e9f36 in PyObject_Call ()
No symbol table info available.
#15 0x00000000004ec11a in ?? ()
No symbol table info available.
#16 0x00000000004e9f36 in PyObject_Call ()
No symbol table info available.
#17 0x00000000004ea396 in PyEval_CallObjectWithKeywords ()
No symbol table info available.
#18 0x00000000004b0bc8 in ?? ()
No symbol table info available.
#19 0x00007f5ce3ba9e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#20 0x00007f5ce2998cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#21 0x0000000000000000 in ?? ()
No symbol table info available.
Undefined command: "exit".  Try "help".