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參數(shù)資料
| 型號： | MT8843 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Calling Number Identification Circuit(主叫識別電路（提供各種主叫線信息傳遞設備的接口）) |
| 中文描述： | 主叫號碼識別電路（主叫識別電路（提供各種主叫線信息傳遞設備的接口）） |
| 文件頁數(shù)： | 21/26頁 |
| 文件大?。?/td> | 178K |
| 代理商： | MT8843 |
MT8843
5-51
Figure 19 - Input and Output Timing for 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 should also be CID (on-hook) capable because TR-NWT-000575 specifies that CIDCW
will be offered only to lines which subscribe to CID.
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. The FSKen pin should be set low to disable the FSK demodulator when FSK is not expected.
3) FSKen may be set high as soon as the CPE has finished sending the acknowledgment signal ACK. TR-NWT-000575 specifies that
ACK = DTMF D for non-ADSI CPE, A for ADSI CPE.
4) FSKen should be set low when CD has become inactive.
5) In an unsuccessful attempt where the end office does not send the FSK signal, the CPE should unmute the handset and enable the
keypad after this interval.
6) SR-TSV-002476 states that it is desirable that the CPE have an on/off switch for the CAS detector. See SW1 in Figure 4.
7) The total recognition time is t
REC
= t
GP
+ t
DP
, where t
GP
is the tone present guard time and t
DP
is the tone present detect time (refer
to section “Dual Tone Detection Guard Time” on page 36 for details).V
TGt
is the comparator threshold (refer to Figure 4).
8) The total tone absent time is t
ABS
= t
GA
+ t
DA
, where t
GA
is the tone absent guard time and t
DA
is the tone absent detect time (refer
to section “Dual Tone Detection Guard Time” on page 36 for details).
V
TGt
is the comparator threshold (refer to Figure 4).
CPE goes off-hook
CAS
ACK
CPE sends
CPE mutes handset & disables keypad
Mark
Data
CPE unmutes handset
and enables keypad
t
DP
t
DA
t
GP
t
GA
t
REC
t
ABS
t
CP
t
CA
Data
V
TGt
A
C
E
F
G
B
D
Note 1
Note 2
Note 3
Note 4
Note 5
TIP/RING
PWDN
FSKen
OSCout
ESt
St/GT
StD
(Note 6)
CD
DR
DCLK
DATA
A = 75-85ms
B = 0-100ms
C = 55-65ms
D = 0-500ms
E = 58-75ms
F = feature specific
G
≤
50ms
Note 7
Note 8
t
PU
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|---|---|
| MT8888C | Integrated DTMF Transceiver with Intel Micro Interface(雙音多頻信號（DTMF）收發(fā)器（帶Intel微接口）) |
| MT8889CC-1 | Integrated DTMFTransceiver with Adaptive Micro Interface |
| MT8889CN-1 | Integrated DTMFTransceiver with Adaptive Micro Interface |
| MT8889CS-1 | Integrated DTMFTransceiver with Adaptive Micro Interface |
| MT8889C | Integrated DTMFTransceiver with Adaptive Micro Interface |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MT8843AE | 制造商:Mitel Networks Corporation 功能描述:TELEPHONE CALLING NO IDENT CKT, PDIP24 |
| MT8843AS | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Calling Number Identification Circuit 2 Preliminary Information |
| MT8860 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:DTMF DECODER |
| MT8860XC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:DTMF DECODER |
| MT8860XE | 制造商:Hitachi 功能描述:DTMF RECEIVER, 18 Pin, Plastic, DIP 制造商:Microsemi Corporation 功能描述:DTMF RECEIVER, 18 Pin, Plastic, DIP 制造商:Mitel Networks Corporation 功能描述:DTMF RECEIVER, 18 Pin, Plastic, DIP |
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