[Freeswitch-users] Little problem of group(callgroup)

[Brad Tuan]

<extension name="group-intercept">
      <condition field="destination_number" expression="^\*8$">
 <action application="answer"/>
 <action application="intercept"
data="${hash(select/${domain_name}-last_dial/${callgroup})}"/>
 <action application="sleep" data="2000"/>
      </condition>
</extension>

What is the ${callgroup} mean??

Is this??

>><group name="billing">
      <users>
          <user id="1005" type="pointer"/>
          <user id="1006" type="pointer"/>
          <user id="1007" type="pointer"/>
          <user id="1008" type="pointer"/>
          <user id="1009" type="pointer"/>
     </users>
    </group>

Or this??

>>81+[group] - Add this extension to calling group #[group] (can be two
digits 00-99). A beep tone confirms the function worked.
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