(gdb) bt

#0  fsk_serie (fskd=0x7d559008, buffer=0x79321000, len=0x7f58a514, outbyte=0xffff05c5) at fskmodem.c:34
34              retval = (float) **buffer / 256;
(gdb) bt
#0  fsk_serie (fskd=0x7d559008, buffer=0x79321000, len=0x7f58a514, outbyte=0xffff05c5) at fskmodem.c:34
#1  0x0808a33d in callerid_feed (cid=0x7d559008,
    ubuf=0x7f58a8e0 "????????????????????????B\022\031???????????????????????????????????????????????????????????????????????????\235\221\215\214\213\212\212\207\210\212\222??/!\032\025\002\002\002\002\002\002\004\017\035;?\214\206\230\221\222\221\217\217\216\216\217\222\224\225\230\233\235???????|XD?", len=2102759432, codec=4) at callerid.c:259
#2  0xabbc1ef3 in ss_thread (data=0x831b188) at chan_zap.c:5563
#3  0xb7fb998c in start_thread () from /lib/tls/libpthread.so.0
#4  0xb7eaa7da in clone () from /lib/tls/libc.so.6


############################################
(gdb) bt full

#0  fsk_serie (fskd=0x7d559008, buffer=0x79321000, len=0x7f58a514, outbyte=0xffff05c5) at fskmodem.c:34
        a = 1
        i = 0
        j = -1208979492
        n1 = 2033188880
        r = 15578
        olen = 2033324032
#1  0x0808a33d in callerid_feed (cid=0x7d559008,
    ubuf=0x7f58a8e0 "????????????????????????B\022\031???????????????????????????????????????????????????????????????????????????\235\221\215\214\213\212\212\207\210\212\222??/!\032\025\002\002\002\002\002\002\004\017\035;?\214\206\230\221\222\221\217\217\216\216\217\222\224\225\230\233\235???????|XD?", len=2102759432, codec=4) at callerid.c:259
        mylen = -64058
        b = 88
        res = 2102759432
        x = 242
        buf = (short int *) 0x793019a8
        obuf = (short int *) 0x793019a8
#2  0xabbc1ef3 in ss_thread (data=0x831b188) at chan_zap.c:5563
        f = (struct ast_frame *) 0xffff05c5
        p = (struct zt_pvt *) 0x8144b28
        exten = '\0' <repeats 79 times>
        exten2 = '\0' <repeats 79 times>
        buf = "????????????????????????B\022\031???????????????????????????????????????????????????????????????????????????\235\221\215\214\213\212\212\207\210\212\222??/!\032\025\002\002\002\002\002\002\004\017\035;?\214\206\230\221\222\221\217\217\216\216\217\222\224\225\230\233\235???????|XD?", '\0' <repeats 95 times>
        dtmfcid = '\0' <repeats 299 times>
        dtmfbuf = '\0' <repeats 299 times>
        cs = (struct callerid_state *) 0x7d559008
        name = 0x0
        number = 0x0
        distMatches = 0
        curRingData = {0, 0, 0}
        receivedRingT = 0
        counter1 = 2136515860
        counter = 0
        samples = 33440
        flags = 0
        i = 1
        timeout = 160
        getforward = 0
        len = 0
        res = 160
---Type <return> to continue, or q <return> to quit---
#3  0xb7fb998c in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#4  0xb7eaa7da in clone () from /lib/tls/libc.so.6
No symbol table info available.