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參數(shù)資料
| 型號(hào)： | HT9020B |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Call Progress Tone Detector |
| 中文描述： | 呼叫進(jìn)展音探測(cè)器 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大?。?/td> | 120K |
| 代理商： | HT9020B |
Functional Description
The HT9020B call progress tone detector can be used in world wide countries. Below is an illustration of a call progress
tone frequency band, and a table of U.S.A. CPT signal is shown for user reference. Usually, HT9020B must work to-
gether with a microcontroller through software to distinguish correct cadence of CPT to fit any country CPT SPEC re-
quirement for world wide application purposes.
U.S.A. Call Progress Tone Signal Format
Tone
Frequency
Condition
Precision Dial Tone
350Hz+440Hz
Continuous high
Old Dial Tone
120Hz (or 133Hz, ..) +600Hz
Continuous high
Precision Busy Tone
480Hz+620Hz
0.5sec high and 0.5sec low
Old Busy Tone
120Hz+600Hz
0.5sec high and 0.5sec low
Precision Reorder Tone
480Hz+620Hz
0.3sec high and 0.2sec low
Old Reorder Tone
120Hz+600Hz
0.2sec high and 0.3sec low or
0.25sec high and 0.25sec low
Precision Ring-back Tone
440Hz+480Hz
2sec high and 4sec low
Old Ring-back Tone
40Hz (or the others) +420Hz
2sec high and 4sec low
Timing Diagram
HT9020B
Rev. 1.20
4
March 31, 2003
3 3
3 *
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3 3
4 /
5
0 * 3
6
7
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7
!
3
6
0
6
Call progress tone frequency band illustration
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT9020 | Call Progress Tone Decoder & ABR Controller |
| HT9020A | Call Progress Tone Decoder & ABR Controller |
| HT9032 | Calling Line Identification Receiver |
| HT9033 | CAS Tone Detector |
| HT9170 | DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT9030 | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Calling line identification receiver |
| HT9031(18DIP-A) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Caller Number ID Circuit |
| HT9031(18DIP-B) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Caller Number ID Circuit |
| HT9031(20DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Caller Number ID Circuit |
| HT9031(24DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Caller Number ID Circuit |
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