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參數(shù)資料
| 型號： | MT88E46 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | Bellcore Compliant Calling Number Identification Circuit |
| 中文描述： | 貝爾通訊兼容主叫號碼識別電路 |
| 文件頁數(shù)： | 21/23頁 |
| 文件大?。?/td> | 522K |
| 代理商： | MT88E46 |
Advance Information
MT88E46
21
Figure 17 - Application Timing: Bellcore Off-Hook Data Transmission, e.g. CIDCW
Notes:
1)In a CPE where AC power is not available, the designer may choose to switch over to line power when the CPE goes off-hook and
use battery power while on-hook. The CPE must also be CID (on-hook) capable because a CIDCW CPE includes CID functionality.
2)Non-FSK signals such as CAS, speech and DTMF tones are in the same frequency band as FSK. They will be demodulated and give
false data. Therefore the MT88E46 should be taken out of FSK mode when FSK is not expected.
3)If the CPE is the ACK-Sender, the MT88E46 may be put into FSK mode right after ACK has been sent. If the CPE is not the ACK-
Sender, the MT88E46 should be put into FSK mode at 30ms (min ACK delay) + 55ms (min ACK duration) = 85ms after the line
HIGH transition. In that case the FSK carrier detector may be activated by the ACK if both the ACK delay and the ACK duration are
at maximum. TR-NWT-000575 specifies that ACK = DTMF ‘D’ for non-ADSI CPE, ‘A’ for ADSI CPE.
4)The MT88E46 should be taken out of FSK mode when CD has become inactive, or when more than 5 framing errors have been
detected in the message, or when more than 150ms of continuous Mark or Space has been detected.
5)In an unsuccessful attempt where the central office does not send the FSK signal, the CPE should unmute the handset and enable
the keypad after interval D has expired.
6)PWDN, Off Hook CASen and FSKen are internal signals decoded from CB0/1/2.
7)The DR/DET output pin is the DET signal when CAS detection is selected, the DR signal when FSK is selected.
CPE goes off-hook
CAS
ACK
CPE sends
CPE mutes handset, disables keypad
and performs MEI check (See TIA/EIA-777)
Mark
Data
CPE unmutes handset
and enables keypad
t
DET2
t
DW
t
CP
t
CA
Data
A
C
E
F
G
B
D
Note 1
Note 3
Note 4
Note 5
TIP/RING
PWDN
(Note 6)
FSKen
(Note 6)
OSC2
DET
(Note 7)
CD
DR
(Note 7)
DCLK
DATA
A = 75-85ms
B = 0-100ms
C = 55-65ms
D = 0-500ms
E = 58-75ms
F = feature specific
G
≤
50ms
t
PU
Note 2
Off Hook CASen
(Note 6)
Speech
25ms
30-40ms
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT88E46AS | Bellcore Compliant Calling Number Identification Circuit |
| MT88EBNR | 4-Wire Calling Number Identification Circuit 2 (4-Wire CNIC2) |
| MT88L70AE1 | 3 Volt Integrated DTMF Receiver |
| MT88L70AE | 3 Volt Integrated DTMF Receiver |
| MT88L70AN | 3 Volt Integrated DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT88E46_06 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Bellcore Compliant Calling Number Identification Circuit |
| MT88E46AS | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Rail/Tube |
| MT88E46AS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Rail/Tube |
| MT88E46ASR | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
| MT88E46ASR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 20SOIC - Tape and Reel |
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