[Serusers] call hunt

[Tulika Pradhan]

i am tring to implement call hunt in ser 0.8.12 (no avpops). there is one 
problem.
i am using exec_dset in the failure route as follows.

failure_route[1] {
                exec_dset("/etc/ser/getnextnumber1 $SIP_OUSER; 
echo>/dev/null;");
                append_branch();
                t_on_failure("1");
                xlog("L_ERR", "time [%Tf] method <%rm> r-uri <%ru> 
<%tu>\n");
                t_relay();
}

after the first failure, the SER sends 408 to the UA (caller) and it gets a 
busy tone. at this point, the second number of the call hunt group is 
ringing. but no voice can go through as the caller UA is showing 408 Request 
Timeout.

please help,

regards,

tulika