| 摘要 |
A system may be provided that includes one or more servers to: set an availability status setting on an account, associated with a subscriber; receive a quota usage signal via a dedicated direct signaling interface, the quota usage signal indicating that a voice call minutes quota or a data usage quota is exhausted; and change the availability status setting on the account to unavailable for voice calls if the voice call minutes quota is exhausted; and/or change the availability status setting on the account to unavailable for data communications if the data usage quota is exhausted.
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