Call Progress Tone Detector

FX643

© 1996 Consumer Microcircuits Limited

11

D/643/4

1.7.1

Electrical Performance (continued)

Figure 3 Timing Diagram: Call Progress Tone(s)

Note 1:

DETECT3 is "1" only when the Call Progress Signal, or a Non Call Progress Signal, is a single

frequency tone.

Figure 4 Timing Diagram: Non Call Progress Signal