| 摘要 |
An optical network terminal (ONT) battery backup unit (BBU) battery voltage alert system (BVAS). The BVAS can send multiple alerts via email, pager, land-line telephone, wireless telephone, fax, personal digital assistant (PDA), etc. when the backup battery voltage is less than its full voltage. The alerts can be categorized as "marginal" or "bad" depending on degree of battery voltage depletion. Less than full battery voltage can result from battery usage if there is a utility company power outage, or if a cell in the battery fails even if there is no power outage. The alerts can be sent to the customer of the ONT, to the ONT supplier company so it can offer any assistance it can and to a third party monitoring service which can keep track of the history of all such deployed batteries in the customer base of the ONT supplier. This alert is provided as a supplement to an audio alarm which sounds when the backup battery is discharging because that alarm may not be heard in sufficient time if the alarm is remotely located relative to its customer, e.g., in the customer's basement or outside.
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