Hi there I am begginer with FS , I use FS plus Gtalk   everything is OK with PCMU codec but whenever  i replace it whit G723 codec i got "This codec is only usable in passthrough mode!" error. SIP GW  >  FreeSwitch  >  Gtalk these are my configuration files : ------- public.xml ---------------- <extension name="Gtalk">   <condition field="source" expression="mod_sofia"/>   <condition field="destination_number" expression="^1234$">  <!-- <action application="set" data="proxy_media=true"/> -->   <action application="set" data="bypass_media=true"/>     <action application="bridge" data="dingaling/gmail.com/xxxxx@gmail.com"/>   </condition> </extension> ------------  dingaling.conf.xml ------------ <configuration name="dingaling.conf" description="XMPP Jingle Endpoint">   <settings>     <param name="debug" value="1"/>     <param name="codec-prefs" value="G723"/>   </settings>   <X-PRE-PROCESS cmd="include" data="../jingle_profiles/*.xml"/> </configuration> ---------- sip_profiles/external.xml --------------- <!--  <param name="inbound-codec-prefs" value="$${global_codec_prefs}"/>  <param name="outbound-codec-prefs" value="$${outbound_codec_prefs}"/> --> <param name="inbound-codec-prefs" value="G723"/>   <param name="outbound-codec-prefs" value="G723"/> I was googling for a while but I got nothing. Thanks in advance.