hi all my local PSTN use an different cid signalling format [ring-DTMF-ring],and my asterisk server can not get the cid info,allways say "UNKNOWN".I try to use EX220 (caller id converter) translate DTMF into FSK,but after that the signal looks like [ring-DTMF-ring-FSK],asterisk still "UNKNOWN" .Is there someway that i can tell asterisk that my fsk signalling start after second ring ? sorry for my English!