| 摘要 |
A system for tracking and for billing telephony interactions on a data-packet-network has a first telephony network covering a first service region; at least one second telephony network covering a second service region; a billing server connected to the data-packet-network, the data-packet-network bridging the first and second telephony networks; at least one telephony data packet gateway system on each of the telephony networks. In a preferred embodiment, a user subscribing to either the first or second service region as a home region and roaming by placing a call from the disparate service region has the call tracked in the disparate region at the gateway system, the tracked results sent to the billing server wherein the billing server establishes a billing record and renders the record accessible to the user.
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