<extension name="fax_receive">

        <condition field="destination_number" expression="^1077$">

                <action application="answer" />

                <action application="playback" data="silence_stream://2000"/>

                <action application="rxfax" data="$${temp_dir}/rxfax.tif"/>

                <action application="hangup"/>

        </condition>

    </extension>

    <extension name="fax_transmit">

      <condition field="destination_number" expression="^1078$">

        <action application="txfax" data="$${temp_dir}/txfax-sample.tiff"/>

        <action application="hangup"/>

      </condition>

    </extension>

    <extension name="test_txfax_stream">

        <condition field="destination_number" expression="^1079$">

                <action application="set" data="ignore_early_media=true"/>

                <action application="set" data="fax_enable_t38=true"/>

                <action application="set" data="fax_verbose=true"/>

                <action application="set" data="hangup_after_bridge_true"/>

                <action application="export" data="execute_on_fax_detect=execute_extension 1078"/>

                <action application="bridge" data="loopback/1077"/>

        </condition>

    </extension>