Call Progress Tone Detector

FX643

© 1996 Consumer Microcircuits Limited

13

D/643/4

For the following conditions unless otherwise specified:

Notes

Min.

Typ.

Max.

Units

Signal Timings (ref. Figures 3, 4, 5 and 6)

Burst Length Ignored

10

70

ms

Burst Length Detected

10

145

ms

Call Progress Tone Gap Length Ignored

7,10,11

20

ms

Call Progress Tone Gap Length Detected

7,10

40

ms

Call Progress Tone Response Time

10

145

ms

Call Progress Tone De-response Time

10

145

ms

Gap Detected Recorded

8,10

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.

10. Timings also apply to Special Information Tone.

11. Special Information Tone Gap Length Ignored is 15ms maximum.