xswitch/conf/testing/dialplan/default/0001_vmain.xml

<extension name="vmain">
  <condition field="destination_number" expression="^vmain$|^\*98$">
    <action application="answer"/>
    <action application="sleep" data="1000"/>
    <action application="voicemail" data="check default ${domain_name}"/>  
  </condition>
</extension>