[Freeswitch-users] ignoring 180 and 183 w/o sdp

Hi,   To avoid unnecessary ring back,I want to avoid 180 and 183 w/o SDP from a particular m/c address.\ I tried using ignore_early_media and sip_ignore_183nosdp.But still FS is not ignoring 180 and forwarding 180 to inbound leg.   What happens is sip_ignore_183nosdp is ignoring 183,but sending 180 instead  of this. Please help me to find out any solution for this.   Manjiri