Question: What happens to the charges contained in the TAP records received by the HPLMN from each VPLMN for services employed by home subscribers whilst roaming?
Option 1: The charges are converted from the local currency to the accounting currency and a handling surcharge (mark-up) is deducted if required.
Option 2: The charges are passed directly to the subscriber billing process without any conversion or addition of handling surcharge.
Option 3: The charges are used only for verification of invoices from the VPLMN and not for billing the home subscribers.
Option 4: The charges are converted from the accounting currency to the local currency and a handling surcharge (mark-up) is added if required.
Explanation: When the HPLMN receives TAP records from each VPLMN, it needs to convert the charges from the accounting currency to the local currency to accurately bill the home subscribers. Additionally, a handling surcharge (mark-up) may be added to the converted charges if required by the HPLMN's billing policies. This process ensures that the home subscribers are billed correctly for the services used while roaming in other PLMNs.