asterisk users - Oct 2005 - CallerID detection problem

hi,
is there anyway to make * to detect callerid before first ring.
i know that it seems silly; but here i have a case that Telco sends
the caller-id before first ring. this issue is detected by installing
a callerid detection device on the line. it shows callerid just before
the first ring. so * can't detect the callerid.

thanks,
paradise dove