capsd 

   <protocol-plugin protocol="ASTERISK"
        class-name="org.opennms.netmgt.capsd.plugins.SnmpPlugin"
        scan="on" user-defined="false">
        <property key="vbname" value=".1.3.6.1.4.1.22736.1.1.1.0"/>
        <property key="vbname" value="SVN-trunk-r58822"/>
        <property key="timeout" value="2000"/>
        <property key="retry" value="2"/>
    </protocol-plugin>


portion relevent to catagories 

               <category>
                <label><![CDATA[Asterisk Servers]]></label>
                <comment>*************blah***************</comment>
                <normal>99.99</normal>
                <warning>97</warning>
                <service>ASTERISK</service>
                <rule><![CDATA[isASTERISK]]></rule>
            </category>