(gdb) bt
#0  0x00d99c9a in q921_transmit_iframe (pri=0x90e4798, buf=0xb79089a0, len=9, cr=1) at q921.c:391
#1  0x00da161c in q931_xmit (pri=0x90e4798, h=0xb79089a0, len=9, cr=1) at q931.c:2403
#2  0x00da1813 in send_message (pri=0x90e4798, c=0x91ac248, msgtype=77, ies=0xdb32d8) at q931.c:2446
#3  0x00da26c9 in q931_release (pri=0x90e4798, c=0x91ac248, cause=16) at q931.c:2731
#4  0x00da229f in pri_disconnect_timeout (data=0x91ac248) at q931.c:2678
#5  0x00d9b930 in __pri_schedule_run (pri=0x90d7fb8, tv=0xb7908e6c) at prisched.c:98
#6  0x00d9b99b in pri_schedule_run (pri=0x90d7fb8) at prisched.c:110
#7  0x00802340 in pri_dchannel (vpri=0x81c738) at chan_zap.c:8473
#8  0x080fd1e8 in dummy_start (data=0x90939a8) at utils.c:852
#9  0x0078f2db in start_thread () from /lib/libpthread.so.0
#10 0x001dd12e in clone () from /lib/libc.so.6
(gdb)

#0  0x00d99c9a in q921_transmit_iframe (pri=0x90e4798, buf=0xb79089a0, len=9, cr=1) at q921.c:391
        f = (q921_frame *) 0x80008
        prev = (q921_frame *) 0x80008
#1  0x00da161c in q931_xmit (pri=0x90e4798, h=0xb79089a0, len=9, cr=1) at q931.c:2403
No locals.
#2  0x00da1813 in send_message (pri=0x90e4798, c=0x91ac248, msgtype=77, ies=0xdb32d8) at q931.c:2446
        buf = "\000\002pHM\b\002\201\220~", '\0' <repeats 1013 times>
        h = (q931_h *) 0xb79089a0
        mh = (q931_mh *) 0xb79089a4
        len = 9
        res = 0
        offset = 4
        x = 2
        codeset = 0
#3  0x00da26c9 in q931_release (pri=0x90e4798, c=0x91ac248, cause=16) at q931.c:2731
        __PRETTY_FUNCTION__ = "q931_release"
#4  0x00da229f in pri_disconnect_timeout (data=0x91ac248) at q931.c:2678
        c = (struct q931_call *) 0x91ac248
        pri = (struct pri *) 0x90e4798
#5  0x00d9b930 in __pri_schedule_run (pri=0x90d7fb8, tv=0xb7908e6c) at prisched.c:98
        x = 2
        callback = (void (*)(void *)) 0xda2236 <pri_disconnect_timeout>
        data = (void *) 0x91ac248
        e = (pri_event *) 0x819a6c
#6  0x00d9b99b in pri_schedule_run (pri=0x90d7fb8) at prisched.c:110
        tv = {tv_sec = 1202797618, tv_usec = 523627}
#7  0x00802340 in pri_dchannel (vpri=0x81c738) at chan_zap.c:8473
        pri = (struct zt_pri *) 0x81c738
        e = (pri_event *) 0x0
        fds = {{fd = 78, events = 3, revents = 0}, {fd = 0, events = -28684, revents = 36}, {fd = 2400544, events = 12, revents = 0}, {fd = -1215261976,
    events = 31389, revents = 23}}
        res = 0
        chanpos = 11
        x = 0
        haveidles = 151885072
        activeidles = 7934609
        nextidle = -1
        c = (struct ast_channel *) 0x91d51f0
        tv = {tv_sec = 1, tv_usec = 127507}
        lowest = {tv_sec = 1, tv_usec = 127507}
        next = (struct timeval *) 0x90d7ff0
        lastidle = {tv_sec = 1202790421, tv_usec = 866918}
        doidling = 0
        cc = 0x80fc1f9 "\211Eü\203}ü"
        idlen = '\0' <repeats 16 times>, "\020\000\000\000(¡$", '\0' <repeats 56 times>
        idle = (struct ast_channel *) 0x79237c
        p = 0
        t = 1202797617
        i = 1
        which = 0
        numdchans = 1
        cause = 0
        crv = (struct zt_pvt *) 0x0
        threadid = 3060366224
        attr = {__size = "\000\000\000\000\000\000\000\000\001\000\000\000\000\020\000\000\000\000\000\000\000À\003", '\0' <repeats 12 times>, __align = 0}
        ani2str = "00\000\000\000"
        plancallingnum = "1130634000", '\0' <repeats 245 times>
        plancallingani = "1130634000", '\0' <repeats 245 times>
        calledtonstr = "1\000\000\000\000\000\000\000\000"
        __PRETTY_FUNCTION__ = "pri_dchannel"
        __FUNCTION__ = "pri_dchannel"
#8  0x080fd1e8 in dummy_start (data=0x90939a8) at utils.c:852
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {7987188, 0, -1215259760, -1215261752, -787946824, 1855430752}, __mask_was_saved = 0}},
  __pad = {0xb7909480, 0x0, 0x0, 0x0}}
        __cancel_routine = (void (*)(void *)) 0x806942d <ast_unregister_thread>
        __cancel_arg = (void *) 0xb7909b90
        not_first_call = 0
        ret = (void *) 0x0
        a = {start_routine = 0x80188d <pri_dchannel>, data = 0x81c738, name = 0x9093a58 "pri_dchannel         started at [ 9478] chan_zap.c start_pri()"}
#9  0x0078f2db in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#10 0x001dd12e in clone () from /lib/libc.so.6