METHOD AND APPARATUS FOR OFF-HOOK DETECTION

摘要

A method and circuit for detecting an off-hook condition on a telephone line (163). A preferred method includes the steps of disabling power to the subscriber loop interface (412), detecting an off-hook condition (410), producing an output (412), and responding to the output. The low power off-hook detection circuit (240) uses passive components to detect a high current condition and therefore consumes little power.