(gdb) bt
#0  0x0000000000464a06 in ast_cdr_specialized_reset (cdr=0x0, _flags=0x0) at cdr.c:1199
#1  0x00000000004c327d in ast_bridge_call (chan=0x7fcc3c0009a8, peer=0x7fcc600046c8, config=0x7fcc132e5b80) at features.c:4540
#2  0x00007fcc3ade84c4 in dial_exec_full (chan=0x7fcc3c0009a8, data=0x7fcc132e8490 "USTM/2101@2101,,tT", peerflags=0x7fcc132e62a0,
    continue_exec=0x0) at app_dial.c:2953
#3  0x00007fcc3ade8e2b in dial_exec (chan=0x7fcc3c0009a8, data=0x7fcc132e8490 "USTM/2101@2101,,tT") at app_dial.c:3055
#4  0x000000000050e3c0 in pbx_exec (c=0x7fcc3c0009a8, app=0x1a61550, data=0x7fcc132e8490 "USTM/2101@2101,,tT") at pbx.c:1567
#5  0x000000000051850e in pbx_extension_helper (c=0x7fcc3c0009a8, con=0x0, context=0x7fcc3c001278 "intphones", exten=0x7fcc3c0012c8 "2101",
    priority=3, label=0x0, callerid=0x7fcc3c0030c0 "2121", action=E_SPAWN, found=0x7fcc132eab80, combined_find_spawn=1) at pbx.c:4407
#6  0x000000000051a233 in ast_spawn_extension (c=0x7fcc3c0009a8, context=0x7fcc3c001278 "intphones", exten=0x7fcc3c0012c8 "2101", priority=3,
    callerid=0x7fcc3c0030c0 "2121", found=0x7fcc132eab80, combined_find_spawn=1) at pbx.c:5070
#7  0x000000000051aad2 in __ast_pbx_run (c=0x7fcc3c0009a8, args=0x0) at pbx.c:5163
#8  0x000000000051c818 in pbx_thread (data=0x7fcc3c0009a8) at pbx.c:5504
#9  0x00000000005780db in dummy_start (data=0x7fcc3c003a00) at utils.c:1014
#10 0x000000352f607851 in start_thread () from /lib64/libpthread.so.0
#11 0x000000352eee811d in clone () from /lib64/libc.so.6
(gdb)