applications/luci-app-pbx/root/etc/pbx-asterisk/extensions_callback_gtalk.conf.TEMPLATE

   1 exten => |NUMBER|,1,System(/etc/pbx-asterisk/delayedcallback "channel originate Gtalk/gtalk-|CALLBACKPROVIDER|/|NUMBER|@voice.google.com extension |NUMBER|@disa-call-context" &)
   2 exten => |NUMBER|,n,Wait(|CALLBACKHUPDELAY|)
   3 exten => |NUMBER|,n,Hangup()
   4