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Querying and Rebalancing Prepaid Resources In cases where a Service Access Device (e.g. NAS) has been allocated quota and the user’s account is depleted (or near depletion) For example, the user is attempting to purchase a ring-tone at one Service-Device, but his account is near zero, but quota is still outstanding at the NAS. It should be possible for the Prepaid system to query the NAS to find out what is its current usage AND to allow the Prepaid system to reclaim some Quota and transfer it to another Service Access Device (in this case the Ring-Tone vending Device) |