Thank u very much, My server is have public ip,and router not have upnp. I modified client.xml : <!-- <param name="ext-rtp-ip" value="auto-nat"/> --> to <param name="ext-rtp-ip" value="My ip"/> Now my Freeswitch + mod_dingaling is working. But there is *no voice* when i call out from google voice and connect called Successed. I try to called my other google phone use freeswitch + mod_dingaling , and into voicemail, the voicemail system can heared my voice,and record good. This mean: caller is no voice,but called is have voice good. there is client.xml: http://pastebin.freeswitch.org/15371 there is cli log: http://pastebin.freeswitch.org/15372 freeswitch version:FreeSWITCH Version 1.0.head (git-a2c0da5 2011-02-11 23-10-12 -0600)