Calling Line Identifier

FX602

© 1998 Consumer Microcircuits Limited

11

D/602/7

See section 1.7.1 for definitions of Tton and Ttoff

Figure 6 : Tone Alert Detector operation

1.5.8

Ring or Line Polarity Reversal Detector

These circuits are used to detect the Line Polarity Reversal and Ringing signals associated with the Calling

Line Identification protocol.

Figure 7 illustrates their use in a typical application.

Figure 7 : Ring or Line Polarity Reversal operation