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參數(shù)資料
| 型號： | MT884 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數(shù)： | 3/11頁 |
| 文件大?。?/td> | 87K |
| 代理商： | MT884 |
Application Note
MSAN-144
A-231
A Three-Pin Interface
Most CID devices only provide a single pin from
which the received data is sent to the micro-
controller. Consequently, the data stream appearing
at the serial data output must be converted to 8-bit
words by a UART (Universal Asynchronous Receiver
Transmitter). The Mitel CNIC, however, has three
pins dedicated to the user interface. This eliminates
the need for a UART or the high software overhead
of a micro-controller performing the UART function
(asynchronous serial data reception). Refer to the
MT8841 data sheet and Figure 1 below.
General Requirements for Calling
Number Delivery Service
According to the Bellcore Technical Reference TR-
NWT-000030, the Central Office physical layer
interface has the following parameters for providing
CND service:
Link Type:
two wire, half-duplex from
SPCS to CPE
Continuous-phase binary FSK
1200
±
12 Hz
2200
±
22 Hz
1200
±
12 baud
-13.5 dBm
±
1.5dB at the point
of application to the loop facility
into a resistive load of 900
ohms.
Modulation Type:
Logical 1 (Mark):
Logical 0 (Space):
Transmission Rate:
Signal Level:
Source Impedance:
900 ohms in series with 2.16
μ
F
to
meet
requirements specified in TR-
TSY-000507.
return
loss
Application of Data: Serial, binary, asynchronous
To properly interact with SPCS for both on-hook and
off-hook data transmission schemes, the CPE should
receive a data signal that meets the following
parameters:
±
Link Type, Modulation Type, Transmission
Rate, Application of Data, Logical 1 (Mark)
and Logical 0 (Space): same as Central Office
transmit values shown above.
±
Received Signal Level at 1200 Hz: between
-32 dBm and -12.5 dBm.
±
Received Signal Level at 2200 Hz: between
-36 dBm and -12.5 dBm.
±
Signal to Distortion Ratio: > 25 dB.
Figure 1 - Serial Data Interface Timing
b0 b1 b2 b3 b4 b5 b6 b7
0
1
b7
b0 b1 b2 b3 b4 b5 b6 b7
b7
b0 b1 b2 b3 b4 b5 b6 b7
0
1
b0 b1 b2
0
1
b0 b1 b2 b3 b4 b5 b6 b7
b0 b1 b2
TIP/RING
DATA
DCLK
DR *
stopstart
stop
start
stopstart
stop
start
stopstart
stop
start
* with external pull-up resistor
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8840 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Data Over Voice Modem |
| MT8840-1 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Data Over Voice Modem |
| MT8840AE | 制造商:Rochester Electronics LLC 功能描述: 制造商:MITEL / ZARLINK 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: |
| MT8840AS | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Data Over Voice Modem |
| MT8841 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Calling Number Identification Circuit |
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