POTS battery removal for IP/ATM-based network equipment
View Patent ↗The present invention discusses a method and apparatus for selectively providing a power to an alarm system, such as the power source provided by a telephone company, to alarm equipment located at customer's premises in a Fiber to the Premises (FTTP) telephone network. This power source is commonly used to power the POTS lines in a Service Provider's network. Two signals, one relating to the optical connectivity of the network and one relating to the connectivity of virtual circuits, are monitored at the customer premises. A logical operation is performed so as to remove a power source if either of the two signals is lost.
1. An apparatus for selectively providing power to an alarm system, comprising:
a first circuit configured to:
receive a first signal indicative of a state of an optical connection to an optical network termination;
receive a second signal indicative of a state of a virtual circuits of a Fiber to the Premises (FTTP) communication link; and
produce an output based on the first and second signals;
a power removal circuit configured to:
receive the output of the first circuit at an enabling input;
receive a power signal;
pass the received power signal to a power removal circuit output when the output of the first circuit does not enable the power removal circuit.
2. The apparatus of claim 1 , wherein the first signal is indicative of a state of an electrical signal produced by a wave division multiplexer.
3. The apparatus of claim 2 , wherein the second signal is indicative of a state of asynchronous transfer mode (ATM) cells extracted from the electrical signal.
4. The apparatus of claim 3 , wherein the electrical signal carries passive optical network protocol compliant information.
5. The apparatus of claim 1 wherein the first circuit is a logical or circuit wherein an output of the first circuit enables the power removal circuit if either the first signal or the second signal indicates a loss of connectivity.
6. The apparatus of claim 1 , wherein the power removal circuit is configured to control power to a subscriber line interface card.
7. A method for selectively providing power to an alarm system, comprising:
receiving a first signal indicative of a state of an optical connection to an optical network termination;
receiving a second signal indicative of a state of a virtual circuits of a Fiber to the Premises (FTTP) communication link;
producing a control output based on the first and second signals;
receiving the control output at an enabling input;
receiving a power signal;
passing the received power signal to a power output when the control output is not asserted.