Sorry, but the problem remains.
I can add some details.
After response, we can listen the DTMF tones, but not the voice.

Now my conf. files:

vars.xml:
  <X-PRE-PROCESS cmd="set" data="outbound_caller_name=FreeSWITCH"/>
  <X-PRE-PROCESS cmd="set" data="outbound_caller_id=0000000000"/>


dialplan\default.xml:
    <extension name="Local_Extension">
      <condition field="destination_number" expression="^(10[01][0-9])$">
        <action application="set" data="dialed_extension=$1"/>
        <action application="export" data="dialed_extension=$1"/>
      </condition>
      <condition field="destination_number" expression="^${caller_id_number}$">
        <action application="set" data="voicemail_authorized=${sip_authorized}"/>
        <action application="answer"/>
        <action application="sleep" data="1000"/>
        <action application="voicemail" data="check default ${domain_name} ${dialed_extension}"/>
        <!-- bind_meta_app can have these args <key> [a|b|ab] [a|b|o|s] <app> -->
        <anti-action application="bind_meta_app" data="1 b s execute_extension::dx XML features"/>
        <anti-action application="bind_meta_app" data="2 b s record_session::$${base_dir}/recordings/${caller_id_number}.${strftime(%Y-%m-%d-%H-%M-%S)}.wav"/>
        <anti-action application="bind_meta_app" data="3 b s execute_extension::cf XML features"/>
        <anti-action application="set" data="ringback=${us-ring}"/>
        <anti-action application="set" data="transfer_ringback=$${hold_music}"/>
        <anti-action application="set" data="call_timeout=30"/>
        <!-- <anti-action application="set" data="sip_exclude_contact=${network_addr}"/> -->
        <anti-action application="set" data="hangup_after_bridge=true"/>
        <!--<anti-action application="set" data="continue_on_fail=NORMAL_TEMPORARY_FAILURE,USER_BUSY,NO_ANSWER,TIMEOUT,NO_ROUTE_DESTINATION"/> -->
        <anti-action application="set" data="continue_on_fail=true"/>
        <anti-action application="db" data="insert/${domain_name}-call_return/${dialed_extension}/${caller_id_number}"/>
        <anti-action application="db" data="insert/${domain_name}-last_dial_ext/${dialed_extension}/${uuid}"/>
        <anti-action application="set" data="called_party_callgroup=${user_data(${dialed_extension}@${domain_name} var callgroup)}"/>
        <!--<anti-action application="export" data="nolocal:sip_secure_media=${user_data(${dialed_extension}@${domain_name} var sip_secure_media)}"/>-->
        <anti-action application="db" data="insert/${domain_name}-last_dial/${called_party_callgroup}/${uuid}"/>
        <anti-action application="bridge" data="user/${dialed_extension}@${domain_name}"/>
        <anti-action application="answer"/>
        <anti-action application="sleep" data="1000"/>
        <anti-action application="voicemail" data="default ${domain_name} ${dialed_extension}"/>
      </condition>
    </extension>
Ciao.
Alby.