#0  0xb7998885 in sipsock_read (id=0x81c1c08, fd=8, events=1, ignore=0x0)
    at /usr/src/nufone/build/asterisk-1.4.9/include/asterisk/strings.h:35
#1  0x080a74f0 in ast_io_wait (ioc=0x8184c28, howlong=277) at io.c:279
#2  0xb7982ea4 in do_monitor (data=0x0) at chan_sip.c:15284
#3  0x080f5860 in dummy_start (data=0x8186d10) at utils.c:545
#4  0xb7f57240 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb7d823de in clone () from /lib/tls/i686/cmov/libc.so.6