There are more extensions but that is the one i'm using.

<include>
    <extension name="ums_demo2">
      <condition field="destination_number" expression="^7002$"/>
      <condition field="${module_exists(mod_v8)}" expression="true"/>
      <condition field="${module_exists(mod_unimrcp)}" expression="true">
                <action application="answer"/>
                <action application="set" data="tts_engine=unimrcp:ums-v2"/>
                <action application="javascript" data="transcribe.js"/>
      </condition>
    </extension>
</include>

-----------------------------------------------------------
IP Addresses were replaced with ***.
They were all real external addresses. Nothing 127.0.0.1 or NAT translated.

<include>
  <!-- UniMRCP Server MRCPv2 -->
  <profile name="ums-v2" version="2">
    <!--param name="client-ext-ip" value="auto"-->
    <param name="client-ip" value="***"/>
    <param name="client-port" value="16090"/>
    <param name="server-ip" value="***"/>
    <param name="server-port" value="8060"/>
    <!--param name="force-destination" value="1"/-->
    <param name="sip-transport" value="udp"/>
    <!--param name="ua-name" value="FreeSWITCH"/-->
    <!--param name="sdp-origin" value="FreeSWITCH"/-->
    <!--param name="rtp-ext-ip" value="auto"/-->
    <param name="rtp-ip" value="***"/>
    <param name="rtp-port-min" value="15000"/>
    <param name="rtp-port-max" value="16000"/>
    <!-- enable/disable rtcp support -->
    <param name="rtcp" value="1"/>
    <param name="rate" value="8000"/>
    <!-- rtcp bye policies (rtcp must be enabled first)
             0 - disable rtcp bye
             1 - send rtcp bye at the end of session
             2 - send rtcp bye also at the end of each talkspurt (input)
    -->
    <param name="rtcp-bye" value="0"/>
    <!-- rtcp transmission interval in msec (set 0 to disable) -->
    <param name="rtcp-tx-interval" value="5000"/>
    <!-- period (timeout) to check for new rtcp messages in msec (set 0 to disable) -->
    <param name="rtcp-rx-resolution" value="1000"/>
    <!--param name="playout-delay" value="50"/-->
    <!--param name="max-playout-delay" value="200"/-->
    <!--param name="ptime" value="20"/-->
    <param name="codecs" value="PCMU PCMA L16/96/8000"/>
    <!--<param name="codecs" value="own-preference='false'>PCMU/94/8000 PCMA/95/8000 L16/96/8000 PCMU/97/16000 PCMA/98/16000 L16/99/16000 telephone-event/101/8000 telephone-event/102/16000"/>-->

    <!-- Add any default MRCP params for SPEAK requests here -->
    <synthparams>
      <!--<param name="Speech-Language" value="it-IT"/>-->
      <!--<param name="voice-name" value="pt-BR-Standard-A"/>-->
    </synthparams>

    <!-- Add any default MRCP params for RECOGNIZE requests here -->
    <recogparams>
      <!--param name="start-input-timers" value="false"/-->
    </recogparams>
  </profile>
</include>