Sending SIP calls to GoogleTalk

Gtalk2voip.com accepts SIP calls to GTalk users, currently for free. The following extension in FreeSWITCH dialplan would do it:

<extension name="gtalk2voip_outbound">
 <condition field="destination_number" expression="^([a-z][0-9a-z-]*\@gtalk2voip.com)$">
  <action application="bridge"
          data="{sip_invite_domain=pub.example.com}sofia/external/$1"/>
 </condition>
</extension>

then the user entry in FreeSWITCH directory would look like this:

<user id="8533">
 <params>
 <param name="dial-string"
        value="loopback/mygtalkusername@gtalk2voip.com/default"/>
 </params>
</user>

Currently Gtalk2voip accepts only Speex@8kHZ  and G.711 codecs.

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