Park by caller console output:
    -- Executing [1100@xyz:1] Set("SIP/xyz011101-081e77e8", "TIMEOUT(absolute)=10800") in new stack
    -- Channel will hangup at 2008-09-15 21:24:59 UTC.
    -- Executing [1100@xyz:2] AGI("SIP/xyz011101-081e77e8", "agi://devel.acecape.com") in new stack
    -- AGI Script Executing Application: (SetCallerPres) Options: (allowed_passed_screen)
    -- AGI Script Executing Application: (Set) Options: (CALLERID(name)=Unknown)
    -- AGI Script Executing Application: (Set) Options: (CALLERID(num)=Unknown)
    -- AGI Script Executing Application: (Dial) Options: (SIP/xyz110001|180|kK)
    -- Called xyz110001
    -- SIP/xyz110001-081ecbb8 is ringing
    -- SIP/xyz110001-081ecbb8 answered SIP/xyz011101-081e77e8
    -- Started music on hold, class 'default', on channel 'SIP/xyz110001-081ecbb8'
  == Parked SIP/xyz110001-081ecbb8 on 701@parkedcalls. Will timeout back to extension [xyz] , 1 in 600 seconds
    -- <SIP/xyz011101-081e77e8> Playing 'digits/7' (language 'en')
    -- <SIP/xyz011101-081e77e8> Playing 'digits/0' (language 'en')
    -- <SIP/xyz011101-081e77e8> Playing 'digits/1' (language 'en')
    -- Added extension '701' priority 1 to parkedcalls
    -- Executing [h@xyz:1] NoOp("SIP/xyz011101-081e77e8", "v2 hangup extension. channel type=SIP") in new stack
    -- Executing [h@xyz:2] GotoIf("SIP/xyz011101-081e77e8", "1?lines_out:+1") in new stack
    -- Goto (xyz,h,5)
    -- Executing [h@xyz:5] GotoIf("SIP/xyz011101-081e77e8", "1?lines_done:+1") in new stack
    -- Goto (xyz,h,8)
    -- Executing [h@xyz:8] NoOp("SIP/xyz011101-081e77e8", "") in new stack
    -- Stopped music on hold on SIP/xyz110001-081ecbb8
webdevel*CLI>
Disconnected from Asterisk server
Executing last minute cleanups
Asterisk ending (0).


Park by calle backtrace:
(gdb) bt full
#0  0x081f14cd in ?? ()
No symbol table info available.
#1  0x080836fe in __ast_read (chan=0x81f0ff8, dropaudio=0) at channel.c:2111
        f = (struct ast_frame *) 0x0
        blah = 1
        prestate = 6
        count = 0
        __PRETTY_FUNCTION__ = "__ast_read"
#2  0x080849e4 in ast_read (chan=0x81f0ff8) at channel.c:2381
No locals.
#3  0xb7b4f3eb in do_parking_thread (ignore=0x0) at res_features.c:1926
        f = (struct ast_frame *) 0x81ee354
        chan = (struct ast_channel *) 0x81f0ff8
        tms = 2759
        x = 0
        con = (struct ast_context *) 0x0
        pl = (struct parkeduser *) 0x0
        pt = (struct parkeduser *) 0x0
        ms = -1
        nrfds = {fds_bits = {0 <repeats 32 times>}}
        pu = (struct parkeduser *) 0x81fc1a8
        max = -1
        nefds = {fds_bits = {0 <repeats 32 times>}}
        rfds = {fds_bits = {33554432, 0 <repeats 31 times>}}
        efds = {fds_bits = {0 <repeats 32 times>}}
        __PRETTY_FUNCTION__ = "do_parking_thread"
#4  0x080fe4bb in dummy_start (data=0xb7a00488) at utils.c:912
        _buffer = {__routine = 0x8069889 <ast_unregister_thread>, __arg = 0xb7b45bb0, __canceltype = 0, __prev = 0x0}
        ret = (void *) 0x0
        a = {start_routine = 0xb7b4ebcf <do_parking_thread>, data = 0x0, name = 0xb7a00498 "do_parking_thread    started at [ 2643] res_features.c load_module()"}
#5  0xb7fa520e in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6  0xb7eff0de in clone () from /lib/tls/libc.so.6
No symbol table info available.