OPTICAL NETWORK TERMINAL BACKUP BATTERY VOLTAGE ALERT
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.
1 . A low battery-voltage warning system comprising:
a voltage monitoring device for monitoring voltage of a battery used as a back-up power supply for an optical network terminal (ONT) installed on customer premises and for providing an indication of degree of discharge of said battery; and
a server computer, receiving said indication as input information, for processing said input information into output information suitable for immediate communication to said customer.
2 . The warning system of claim 1 wherein said communication is accomplished via email.
3 . The warning system of claim 1 wherein said communication is accomplished via text-messaging.
4 . The warning system of claim 1 wherein said communication is accomplished via land-line telephone call.
5 . The warning system of claim 1 wherein said communication is accomplished via wireless telephone call.
6 . The warning system of claim 1 wherein said communication is accomplished via a paging alert.
7 . The warning system of claim 1 wherein said communication is accomplished via communication to a personal digital assistant (PDA) of said customer.
8 . The warning system of claim 1 wherein said server computer further processes said input information into output information suitable for immediate communication to a supplier of said ONT, thereby alerting said supplier to either replace said battery or notify said customer to replace said battery.
9 . The warning system of claim 1 wherein said battery voltage should be twelve volts when fully charged and wherein said communication indicates that said degree of discharge is marginal for values of said battery voltage below said twelve volts and above eight volts.
10 . The warning system of claim 9 wherein said communication indicates that said degree of discharge is bad for values of said battery voltage equal to or less than said eight volts.
11 . The warning system of claim 1 wherein said monitoring is continuous allowing sampling of said monitored voltage.