Hello Brian : I finally work something out ! # the dialplan <extension name="centrex testing"> <condition field="destination_number" expression="^(1[0-9][0-9][0-9])$"> <action application="set" data="dialed_ext=$1"/> <action application="export" data="dialed_ext=$1"/> </condition> <condition field="${sip_from_host}" expression="^${sip_to_host}$"> <action application="bridge" data="sofia/${sofia_profile_name}/${dialed_ext}" /> <anti-action application="bridge" data="sofia/${sip_to_host}/${dialed_ext}" /> </condition> </extension> # the same EXT 1528@inter2 bridged with 1528@internal 2008-08-22 15:58:06 [NOTICE] sofia.c:2491 sofia_handle_sip_i_state() Channel [sofia/inter2/1528] has been answered 2008-08-22 15:58:06 [DEBUG] mod_sofia.c:430 sofia_answer_channel() Local SDP sofia/internal/1528@210.243.126.69: 2008-08-22 15:58:06 [NOTICE] switch_ivr_originate.c:1298 switch_ivr_originate() Channel [sofia/internal/1528@210.243.126.69] has been answered But there is one issue 2008-08-22 15:06:11 [WARNING] sofia.c:3130 sofia_handle_sip_i_invite() IP 219.81.16.134 Rejected by acl domains I have to disable the acl in profiles <!-- param name="apply-inbound-acl" value="domains"/ --> otherwise it won't allow me to call "sip:1528@internal" from "sip:1528@inter2" ( PLS explain the security issue ) # the following diaplan tested , really nothing to do with ENUM very good DNS working <extension name="apnic Testing" continue="true"> <condition field="destination_number" expression="^(info|billing)"> <action application="bridge" data="sofia/default/$1@${sip_to_host}" /> </condition> </extension> 1 0.000000 210.243.126.69 -> 203.119.0.97 SIP/SDP Request: INVITE sip:billing@voip.apnic.net, with session description 2 0.246246 203.119.0.97 -> 210.243.126.69 SIP Status: 100 Trying 3 0.659271 203.119.0.97 -> 210.243.126.69 SIP Status: 180 Ringing 4 2.589506 210.243.126.69 -> 203.119.0.97 SIP Request: CANCEL sip:billing@voip.apnic.net Also been through these points. http://lists.freeswitch.org/pipermail/freeswitch-users/2008-August/005531.ht...