Hook switch status glitch filter

The present invention relates to analog glitch filter circuitry, and more particularly to a hook switch status glitch filter to prevent false dial pulses and false off hook indications at the central office. A line card circuit using a pair of comparators such that the output of the first comparator is coupled to an input of the second comparator through an RC circuit. The RC circuit is tuned such that short transients, such as false pulses and false off hook indications passed by the first comparator are not passed by the RC circuit to the second comparator. The input of the first comparator is coupled to the subscriber line and the output of the second comparator is coupled to the switch's hook status detection circuitry.