FIBER OPTIC TELECOMMUNICATIONS CARD WITH SECURITY DETECTION
3 Assignments
0 Petitions
Accused Products
Abstract
A transceiver card for a telecommunications box for transmitting data over a first optical fiber and receiving data over a second optical fiber. The card has transmitter for transmitting data over the first optical fiber, the transmitter having a laser and a modulator, a fiber output optically connected to the laser for connecting the first optical fiber to the card, a fiber input for connecting the second optical fiber to the card, a receiver optically connected to the fiber input for receiving data from the second optical fiber, and an OTDR optically connected between the transmitter and the fiber output or between the receiver and the fiber input. An energy level detector is also provided between the receiver and the fiber input.
11 Citations
28 Claims
-
1-17. -17. (canceled)
-
18. A method of monitoring fiber optic communications received at a telecommunications box, the method comprising:
-
receiving phase-modulated optical signals from an optical fiber terminated at the telecommunications box; converting the phase-modulated optical signals to electronic output data; passing the phase-modulated optical signals to a photodetector to produce an electric signal; and filtering the electrical signal to produce an average optical power. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
-
-
26. A method of operating a receiver of a telecommunications box, the method comprising:
-
receiving phase-modulated optical signals from an optical fiber terminated at the telecommunications box; demodulating the phase-modulated optical signals to produce output data; measuring an energy level of the phase-modulated optical signals; and comparing the energy level to a threshold indicating a drop in amplitude of the phase-modulated optical signals. - View Dependent Claims (27)
-
-
28. A method of operating a receiver of a telecommunications box, the method comprising:
-
receiving phase-modulated optical signals from an optical fiber terminated at the telecommunications box; demodulating the phase-modulated optical signals to produce output data; splitting at least a portion of the phase-modulated optical signals to form a split optical signal; and measuring the split optical signal and outputting an electrical voltage corresponding to an optical power of the split optical signal.
-
Specification