Thank you for your response.
Actually I'm bit confused to provide the information .
Asterisk version is 1.4.44
--- (8 headers 0 lines) ---
<--- SIP read from 18.104.22.168:5060 --->
SIP/2.0 200 OK
Via: SIP/2.0/UDP 22.214.171.124:5060;branch=z9hG4bK6c7e828d;rport=5060
From: "61372404634" ;tag=as2ca649f9
CSeq: 102 INVITE
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, NOTIFY
Supported: path, replaces
Allow-Events: talk, hold, conference, refer
Remote-Party-ID: "Outbound Call" ;party=calling;privacy=off;screen=no
o=FreeSWITCH 1492554203 1492554204 IN IP4 126.96.36.199
c=IN IP4 188.8.131.52
m=audio 23586 RTP/AVP 18 101
This is Australia call routing is perfect. But my issue is with USA call routing . if you see the dial plan its same as for USA call also . But USA calls are coming to our agents port with ring ring sound . and most of the USA are having this issue.