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參數(shù)資料
| 型號： | MT88E43B |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Extended Voltage Calling Number Identification Circuit (ECNIC)(擴展電壓主叫識別電路（接收傳送的物理層信號）) |
| 中文描述： | 擴展電壓主叫號碼識別電路（ECNIC）（擴展電壓主叫識別電路（接收傳送的物理層信號）） |
| 文件頁數(shù)： | 23/27頁 |
| 文件大?。?/td> | 180K |
| 代理商： | MT88E43B |
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Preliminary Information
MT88E43B
75
Figure 20 - 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 must be also 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 57 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 57 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
Packet
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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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MT88E43BE | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BS | 制造商:Microsemi Corporation 功能描述: |
| MT88E43BS1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Rail/Tube 制造商:Microsemi Corporation 功能描述:CALLING NUMBER ID CIRCUIT 2 |
| MT88E43BSR | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Extended Voltage Calling Number Identification Circuit 2 |
| MT88E43BSR1 | 制造商:Microsemi Corporation 功能描述:CALLER ID CMOS 3.58MHZ 3.3V/5V 24SOIC - Tape and Reel 制造商:Microsemi Corporation 功能描述:PB FREE CALLING NUMBER ID CIRCUIT 2 |
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