<vendor code="4874" name="Juniper">
                    <attribute name="ERX-Ingress-Policy-Name" type="string" code="10"/>
                    <attribute name="ERX-Egress-Policy-Name" type="string" code="11"/>
                    <attribute name="ERX-Ingress-Statistics" type="integer" code="12"/>
                    <attribute name="ERX-Egress-Statistics" type="integer" code="13"/>
                    <attribute name="ERX-Pppoe-Description" type="string" code="24"/>
                    <attribute name="ERX-Input-Gigapkts" type="integer" code="42"/>
                    <attribute name="ERX-Output-Gigapkts" type="integer" code="43"/>
                    <attribute name="ERX-Interface-Desc" type="string" code="63"/>
                </vendor>

import bitel.billing.server.radius.*;
 
prefix = "pppoe ";
length = prefix.length();

attributes = request.getVendorAttributes( 4874 );
if( attributes != null )
for( it = attributes.iterator(); it.hasNext(); )
{
     ra = (RadiusAttribute)it.next();
     value = ra.getStringValue();
     if( value.startsWith( prefix ) )
     {
        request.setStringAttribute( RadiusStandartAttributes.Calling_Station_Id, value.substring( length )  );
     }
}