(gdb) bt full
#0  0x0814af3e in __ast_pthread_mutex_lock (filename=0x81be8c0 "sched.c", lineno=221, func=0x81bec2d "ast_sched_add_variable",
    mutex_name=0x81be94b "&con->lock", t=0x0) at /home/pabelanger/svn/asterisk-1.6.0/include/asterisk/lock.h:372
        res = 136494724
        canlog = -1209000218
        __PRETTY_FUNCTION__ = "__ast_pthread_mutex_lock"
#1  0x0814bd3e in ast_sched_add_variable (con=0x0, when=2000, callback=0x8152d7d <send_sigurg>, data=0xb6b3e890, variable=0) at sched.c:221
        tmp = (struct sched *) 0xb6b52dbb
        res = -1
        __PRETTY_FUNCTION__ = "ast_sched_add_variable"
#2  0x0814bead in ast_sched_add (con=0x0, when=2000, callback=0x8152d7d <send_sigurg>, data=0xb6b3e890) at sched.c:255
No locals.
#3  0x0815380b in ast_tcptls_client_start (desc=0xb6b3e910) at tcptls.c:290
        flags = 135607924
        ser = (struct ast_tcptls_session_instance *) 0x0
        ssu = {tid = 3065256848, schedid = -1}
        __PRETTY_FUNCTION__ = "ast_tcptls_client_start"
#4  0xb6bab2df in sip_prepare_socket (p=0x823d7f0) at chan_sip.c:18733
        s = (struct sip_socket *) 0x823d984
        ser = (struct ast_tcptls_session_instance *) 0x0
        ca = {sin = {sin_family = 2, sin_port = 50195, sin_addr = {s_addr = 50401452}, sin_zero = "\000\000\000\000\000\000\000"}, oldsin = {
    sin_family = 2, sin_port = 50195, sin_addr = {s_addr = 50401452}, sin_zero = "\000\000\000\000\000\000\000"}, hostname = '\0' <repeats 63 times>,
  tls_cfg = 0x0, accept_fd = 19, poll_timeout = 0, master = 0, accept_fn = 0, periodic_fn = 0, worker_fn = 0, name = 0xb6bcef5a "SIP socket"}
        name = "SIP socket"
        __PRETTY_FUNCTION__ = "sip_prepare_socket"
        __FUNCTION__ = "sip_prepare_socket"
#5  0xb6b54ef9 in __sip_xmit (p=0x823d7f0,
    data=0xb6b3ffcc "OPTIONS sip:hound.vopella.com SIP/2.0\r\nVia: SIP/2.0/TCP 172.16.1.4:5068;branch=z9hG4bK09d16f19;rport\r\nMax-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopell"..., len=549) at chan_sip.c:2589
        res = 0
        dst = (const struct sockaddr_in *) 0x823da8c
        __PRETTY_FUNCTION__ = "__sip_xmit"
#6  0xb6b5646c in __sip_reliable_xmit (p=0x823d7f0, seqno=102, resp=0,
    data=0xb6b3ffcc "OPTIONS sip:hound.vopella.com SIP/2.0\r\nVia: SIP/2.0/TCP 172.16.1.4:5068;branch=z9hG4bK09d16f19;rport\r\nMax-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopell"..., len=549, fatal=1, sipmethod=3) at chan_sip.c:2875
        pkt = (struct sip_pkt *) 0x0
        siptimer_a = 1000
        xmitres = 0
        __PRETTY_FUNCTION__ = "__sip_reliable_xmit"
#7  0xb6b57d34 in send_request (p=0x823d7f0, req=0xb6b3fda8, reliable=XMIT_CRITICAL, seqno=102) at chan_sip.c:3180
        res = 0
#8  0xb6b75258 in transmit_invite (p=0x823d7f0, sipmethod=3, sdp=0, init=2) at chan_sip.c:8932
        req = {rlPart1 = 0x0, rlPart2 = 0x0, len = 549, headers = 13, method = 3, lines = 0, sdp_start = 0, sdp_end = 0, debug = 0 '\0',
  has_to_tag = 0 '\0', ignore = 0 '\0', header = {
    0xb6b3ffcc "OPTIONS sip:hound.vopella.com SIP/2.0\r\nVia: SIP/2.0/TCP 172.16.1.4:5068;branch=z9hG4bK09d16f19;rport\r\nMax-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopell"...,
    0xb6b3fff3 "Via: SIP/2.0/TCP 172.16.1.4:5068;branch=z9hG4bK09d16f19;rport\r\nMax-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopella.com>\r\nContact: <sip:asterisk@172.16.1"...,
    0xb6b40032 "Max-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopella.com>\r\nContact: <sip:asterisk@172.16.1.4:5060;transport=TCP>\r\nCall-ID: 1cfb0e86654ba3bf4dd0fbda1868ce"...,
    0xb6b40044 "From: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopella.com>\r\nContact: <sip:asterisk@172.16.1.4:5060;transport=TCP>\r\nCall-ID: 1cfb0e86654ba3bf4dd0fbda1868ceda@172.16.1.4\r\nCSe"...,
    0xb6b4007f "To: <sip:hound.vopella.com>\r\nContact: <sip:asterisk@172.16.1.4:5060;transport=TCP>\r\nCall-ID: 1cfb0e86654ba3bf4dd0fbda1868ceda@172.16.1.4\r\nCSeq: 102 OPTIONS\r\nUser-Agent: Asterisk PBX SVN-branch-1.6.0-r"...,
    0xb6b4009c "Contact: <sip:asterisk@172.16.1.4:5060;transport=TCP>\r\nCall-ID: 1cfb0e86654ba3bf4dd0fbda1868ceda@172.16.1.4\r\nCSeq: 102 OPTIONS\r\nUser-Agent: Asterisk PBX SVN-branch-1.6.0-r155815M-/trunk\r\nDate: Tue, 11"...,
    0xb6b400d3 "Call-ID: 1cfb0e86654ba3bf4dd0fbda1868ceda@172.16.1.4\r\nCSeq: 102 OPTIONS\r\nUser-Agent: Asterisk PBX SVN-branch-1.6.0-r155815M-/trunk\r\nDate: Tue, 11 Nov 2008 22:01:39 GMT\r\nAllow: INVITE, ACK, CANCEL, OPT"...,
    0xb6b40109 "CSeq: 102 OPTIONS\r\nUser-Agent: Asterisk PBX SVN-branch-1.6.0-r155815M-/trunk\r\nDate: Tue, 11 Nov 2008 22:01:39 GMT\r\nAllow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY\r\nSupported: replac"...,
    0xb6b4011c "User-Agent: Asterisk PBX SVN-branch-1.6.0-r155815M-/trunk\r\nDate: Tue, 11 Nov 2008 22:01:39 GMT\r\nAllow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY\r\nSupported: replaces, timer\r\nContent-"...,
---Type <return> to continue, or q <return> to quit---
    0xb6b40157 "Date: Tue, 11 Nov 2008 22:01:39 GMT\r\nAllow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY\r\nSupported: replaces, timer\r\nContent-Length: 0\r\n\r\n",
    0xb6b4017c "Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY\r\nSupported: replaces, timer\r\nContent-Length: 0\r\n\r\n",
    0xb6b401c0 "Supported: replaces, timer\r\nContent-Length: 0\r\n\r\n", 0xb6b401dc "Content-Length: 0\r\n\r\n", 0x0 <repeats 51 times>}, line = {
    0x0 <repeats 64 times>},
  data = "OPTIONS sip:hound.vopella.com SIP/2.0\r\nVia: SIP/2.0/TCP 172.16.1.4:5068;branch=z9hG4bK09d16f19;rport\r\nMax-Forwards: 70\r\nFrom: \"asterisk\" <sip:asterisk@172.16.1.4>;tag=as6009d016\r\nTo: <sip:hound.vopell"..., socket = {type = 0, fd = 0, port = 0, ser = 0x0}}
        __PRETTY_FUNCTION__ = "transmit_invite"
#9  0xb6bae3c9 in sip_poke_peer (peer=0x8228388) at chan_sip.c:19477
        p = (struct sip_pvt *) 0x823d7f0
        xmitres = 0
        __PRETTY_FUNCTION__ = "sip_poke_peer"
#10 0xb6b7a720 in sip_poke_peer_s (data=0x8228388) at chan_sip.c:9741
        peer = (struct sip_peer *) 0x8228388
#11 0x0814c4ea in ast_sched_runq (con=0x8267500) at sched.c:369
        current = (struct sched *) 0x8275818
        tv = {tv_sec = 1226440899, tv_usec = 45582}
        numevents = 0
        res = 135578506
        __PRETTY_FUNCTION__ = "ast_sched_runq"
#12 0xb6bac334 in do_monitor (data=0x0) at chan_sip.c:19034
        res = 0
        dialog = (struct sip_pvt *) 0x0
        t = 1226440898
        reloading = 0
        __PRETTY_FUNCTION__ = "do_monitor"
#13 0x0816033f in dummy_start (data=0x823a2f8) at utils.c:917
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {-1209966604, 0, -1229710448, -1229712424, 2082914451, 939805678}, __mask_was_saved = 0}},
  __pad = {0xb6b41490, 0x0, 0x0, 0x0}}
        __cancel_routine = (void (*)(void *)) 0x8075475 <ast_unregister_thread>
        __cancel_arg = (void *) 0xb6b41b90
        not_first_call = 0
        ret = (void *) 0x0
        a = {start_routine = 0xb6babed5 <do_monitor>, data = 0x0,
  name = 0x8279680 "do_monitor", ' ' <repeats 11 times>, "started at [19062] chan_sip.c restart_monitor()"}
        lock_info = (struct thr_lock_info *) 0x822b678
        mutex_attr = {__size = "\001\000\000", __align = 1}
        __PRETTY_FUNCTION__ = "dummy_start"
#14 0xb7e064fb in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#15 0xb7ef4e5e in clone () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.