Call Progress Tone Detector

FX633

© 1996 Consumer Microcircuits Limited

11

D/633/3

1.7.1

Electrical Performance (continued)

Figure 5 Timing Diagram: Call Progress Tone(s) to Non Call Progress Signal

For the following conditions unless otherwise specified:

Notes

Min.

Typ.

Max.

Units

Signal Timings (ref. Figures 3, 4 and 5)

Burst Length Ignored

70

ms

Burst Length Detected

145

ms

Call Progress Tone Gap Length Ignored

7

20

ms

Call Progress Tone Gap Length Detected

7

40

ms

Call Progress Tone Response Time

145

ms

Call Progress Tone De-response Time

145

ms

Gap Detected Recorded

8

6

ms

Non Call Progress Signal Gap Length Ignored

9

80

ms

Non Call Progress Signal Response Time

145

ms

Non Call Progress signal De-response Time

80

ms

State Change

0

ms

Notes:

7.

Only applies to bursts of the same frequency.

8.

To acknowledge a short tone gap

≥ 40 ms, No Signal is indicated for a minimum of 6ms.

9.

If the gap > 90 ms, a No Signal state will be decoded.