Diameter: Direct Debit request USU issue

Hi,

We have observed in our logic that OCSG by default uses USU in the Diameter request for chargeAmount. The XML is as below:

<Credit-Control-Request Flags="RP" AppId="4" HopByHopId="802451266" EndToEndId="597004866">

  <Session-Id>10.187.123.131;1300087078;43</Session-Id>

  <Origin-Host>10.187.123.131</Origin-Host>

  <Origin-Realm>portal.com</Origin-Realm>

  <Auth-Application-Id>4</Auth-Application-Id>

  <Destination-Realm>portal.com</Destination-Realm>

  <CC-Request-Type>4</CC-Request-Type>

  <CC-Request-Number>0</CC-Request-Number>

  <Service-Context-Id>272@portal.com</Service-Context-Id>

  <Event-Timestamp>-785601340</Event-Timestamp>

  <User-Name>default_spa</User-Name>

  <OCSG-Application-Id>default_apa</OCSG-Application-Id>

  <Subscription-Id>

    <Subscription-Id-Type>0</Subscription-Id-Type>

    <Subscription-Id-Data>009900419000</Subscription-Id-Data>

  </Subscription-Id>

  <Used-Service-Unit>

    <CC-Money>

      <Unit-Value>

        <Value-Digits>2</Value-Digits>

        <Exponent>0</Exponent>

      </Unit-Value>

      <Currency-Code>840</Currency-Code>

    </CC-Money>

  </Used-Service-Unit>

  <Requested-Action>0</Requested-Action>

  <OSCG-Reference-Code>Dummy reference code</OSCG-Reference-Code>

</Credit-Control-Request>

According to the Diameter RFC 4006 for Credit Control Application Section 6.3 Direct Debiting instead RSU should be used for specifying the units to be debited.