System for intercepting signals to be transmitted over a...

Optical communications – Eavesdropping

Reexamination Certificate

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Details

C398S045000, C398S066000, C398S069000, C398S070000, C398S071000, C379S035000

Reexamination Certificate

active

07835644

ABSTRACT:
A system is provided for intercepting signals transmitted between a target served by a fiber optic network and a subscriber. A network is described having a phone switch at a central office configured to receive signals for transmission to and from a target, such as the target of a criminal investigation. A signal received at the central office is assigned to an analog circuit, and a monitoring device configured to intercept and monitor the signal is installed along the analog circuit at a location that allows the monitoring of communications without notifying the target that he is under surveillance. After the signal has been monitored, it is converted to a digital signal for transmission. A method is also provided for intercepting a signal transmitted between the target served by a fiber optic network and a subscriber, such that a monitoring device may be installed without alerting the target.

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“Channel bank” Newton's Telecom Dictionary 9th ed 1995.

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