freeswitch/conf/sbc/sbc_profiles/internal/example.xml

<include>
  <!--<gateway name="asterlink.com">-->
  <!--/// account username *required* ///-->
  <!--<param name="username" value="cluecon"/>-->
  <!--/// auth realm: *optional* same as gateway name, if blank ///-->
  <!--<param name="realm" value="asterlink.com"/>-->
  <!--/// username to use in from: *optional* same as  username, if blank ///-->
  <!--<param name="from-user" value="cluecon"/>-->
  <!--/// domain to use in from: *optional* same as  realm, if blank ///-->
  <!--<param name="from-domain" value="asterlink.com"/>-->
  <!--/// account password *required* ///-->
  <!--<param name="password" value="2007"/>-->
  <!--/// extension for inbound calls: *optional* same as username, if blank ///-->
  <!--<param name="extension" value="cluecon"/>-->
  <!--/// proxy host: *optional* same as realm, if blank ///-->
  <!--<param name="proxy" value="asterlink.com"/>-->
  <!--/// send register to this proxy: *optional* same as proxy, if blank ///-->
  <!--<param name="register-proxy" value="mysbc.com"/>-->
  <!--/// expire in seconds: *optional* 3600, if blank ///-->
  <!--<param name="expire-seconds" value="60"/>-->
  <!--/// do not register ///-->
  <!--<param name="register" value="false"/>-->
  <!-- which transport to use for register -->
  <!--<param name="register-transport" value="udp"/>-->
  <!--How many seconds before a retry when a failure or timeout occurs -->
  <!--<param name="retry-seconds" value="30"/>-->
  <!--Use the callerid of an inbound call in the from field on outbound calls via this gateway -->
  <!--<param name="caller-id-in-from" value="false"/>-->
  <!--extra sip params to send in the contact-->
  <!--<param name="contact-params" value=""/>-->
  <!--send an options ping every x seconds, failure will unregister and/or mark it down-->
  <!--<param name="ping" value="25"/>-->
  <!--</gateway>-->
</include>