(gdb) bt
#0  0x0809d986 in get_sample (buffer=0xb6ffeef4, len=0xb6ffef54) at fskmodem.c:48
#1  0x0809da5c in fsk_serie (fskd=0xb6f4d008, buffer=0xb7051000, len=0xb6ffef54,
    outbyte=0xb6ffef4c) at fskmodem.c:225
#2  0x0809a2b5 in callerid_feed (cid=0xb6f4d008,
    ubuf=0xb6fff2a0 "^F???3,*/O???R1'\033\026#3;M????\236\230\222\217\217\221\226\235??????U@/##,)!!\026\017\021\024\030\033\035!%'-=}?\237\231\235???????;#'/;J??Us??????D/E???\227\225\237???DJK7*\035\027\022\017\021\021\026\035#!$)3P???\237???\236\231\221\221\224\230\234\237?????G-\035\032\036'$\036*)\037.??????", len=160, codec=4) at callerid.c:274
#3  0xb7cb6bf2 in ss_thread (data=0xb7501ec0) at chan_zap.c:6275
#4  0x00ce91d5 in start_thread () from /lib/tls/libpthread.so.0
#5  0x00b692da in clone () from /lib/tls/libc.so.6
(gdb) bt full
#0  0x0809d986 in get_sample (buffer=0xb6ffeef4, len=0xb6ffef54) at fskmodem.c:48
        retval = -2.44620096e-05
#1  0x0809da5c in fsk_serie (fskd=0xb6f4d008, buffer=0xb7051000, len=0xb6ffef54,
    outbyte=0xb6ffef4c) at fskmodem.c:225
        a = -1224737872
        i = 0
        j = -1211288636
        n1 = 324
        r = -1224736752
        samples = 66413
        olen = -1224741144
#2  0x0809a2b5 in callerid_feed (cid=0xb6f4d008,
    ubuf=0xb6fff2a0 "^F???3,*/O???R1'\033\026#3;M????\236\230\222\217\217\221\226\235??????U@/##,)!!\026\017\021\024\030\033\035!%'-=}?\237\231\235???????;#'/;J??Us??????D/E???\227\225\237???DJK7*\035\027\022\017\021\021\026\035#!$)3P???\237???\236\231\221\221\224\230\234\237?????G-\035\032\036'$\036*)\037.??????", len=160, codec=4) at callerid.c:274
        mylen = -66250
        olen = 162
        b = 88
        res = 0
        x = 160
        buf = (short int *) 0xb7030928
        obuf = (short int *) 0xb7030928
        __PRETTY_FUNCTION__ = "callerid_feed"
#3  0xb7cb6bf2 in ss_thread (data=0xb7501ec0) at chan_zap.c:6275
        chan = (struct ast_channel *) 0xb7501ec0
        p = (struct zt_pvt *) 0x81a51f8
        exten = '\0' <repeats 79 times>
        exten2 = '\0' <repeats 79 times>
        buf = "^F???3,*/O???R1'\033\026#3;M????\236\230\222\217\217\221\226\235??????U@/##,)!!\026\017\021\024\030\033\035!%'-=}?\237\231\235???????;#'/;J??Us??????D/E???\227\225\237???DJK7*\035\027\022\017\021\021\026\035#!$)3P???\237???\236\231\221\221\224\230\234\237?????G-\035\032\036'$\---Type <return> to continue, or q <return> to quit---
036*)\037.??????", '\0' <repeats 95 times>
        dtmfcid = '\0' <repeats 299 times>
        dtmfbuf = '\0' <repeats 299 times>
        cs = (struct callerid_state *) 0xb6f4d008
        name = 0x0
        number = 0x0
        distMatches = 0
        curRingData = {0, 0, 0}
        receivedRingT = 0
        counter1 = 0
        counter = 0
        cidcounter = 0
        samples = 3360
        flags = 0
        i = 1
        timeout = 0
        getforward = 0
        s1 = 0x0
        s2 = 0x0
        len = 0
        res = 160
        index = 0
        __PRETTY_FUNCTION__ = "ss_thread"
#4  0x00ce91d5 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#5  0x00b692da in clone () from /lib/tls/libc.so.6
No symbol table info available.
(gdb)