It was a voice call (not fax) through a DID.... and asterisk getting crashed...
I haven't checked it with FAX MAchine...
anyhelp??? not getting any error message to trouble shoot it....

thanks
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*CLI>  -- Executing Answer("SIP/202.154.237.13-0818f7a0", "") in new stack
    -- Executing Set("SIP/202.154.237.13-0818f7a0", "TIMEOUT(absolute)=35") in new stack
    -- Channel will hangup at 2007-06-18 22:52:48 UTC.
    -- Executing Set("SIP/202.154.237.13-0818f7a0", "FAXFILE=/root/test.tif") in new stack
    -- Executing TxFAX("SIP/202.154.237.13-0818f7a0", "/root/test.tif") in new stack
Segmentation fault (core dumped)
[root@new asterisk]#