Call Progress Tone Detector
FX633
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:
Xtal Frequency = 3.579545MHz, V = 3.3V to 5.0V, Tamb = - 40°C to +85°C, S/N = 20dB.
DD
Notes
Min.
Typ.
Max.
70
Units
Signal Timings (ref. Figures 3, 4 and 5)
t
t
t
t
t
t
t
t
t
t
t
Burst Length Ignored
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
I
Burst Length Detected
145
40
L
Call Progress Tone Gap Length Ignored
Call Progress Tone Gap Length Detected
Call Progress Tone Response Time
Call Progress Tone De-response Time
Gap Detected Recorded
7
7
20
GI
GD
RP
145
145
DRP
GDR
NG
NRP
DNRP
CH
8
9
6
145
0
Non Call Progress Signal Gap Length Ignored
Non Call Progress Signal Response Time
Non Call Progress signal De-response Time
State Change
80
80
Notes:
7. Only applies to bursts of the same frequency.
8. To acknowledge a short tone gap ³ 40 ms, No Signal is indicated for a minimum of 6ms.
9. If the gap > 90 ms, a No Signal state will be decoded.
ã 1996 Consumer Microcircuits Limited
11
D/633/3
CMLMICRO [ CML MICROCIRCUITS ]
