Fiber optic telecommunications card with security detection

  • US 8,913,898 B2
  • Filed: 02/05/2013
  • Issued: 12/16/2014
  • Est. Priority Date: 07/09/2001
  • Status: Active Grant
First Claim
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1. A transceiver card for a telecommunications box for transmitting data over a first optical fiber and receiving data over a second optical fiber, the transceiver card comprising:

  • a transmitter having a laser, a modulator, and a controller configured to receive input data and control the modulator to generate a first optical signal as a function of the input data;

    a fiber output optically connected to the transmitter and configured to optically connect the first optical fiber to the transceiver card;

    a receiver configured to receive a second optical signal from the second optical fiber and to convert the second optical signal to output data;

    fiber input optically connected to the receiver and configured to optically connect the second optical fiber to the transceiver card; and

    an energy level detector optically connected between the receiver and the fiber input to measure an energy level of the second optical signal, wherein the energy level detector includes a plurality of thresholds.

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