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參數(shù)資料
| 型號： | MH89770S |
| 廠商： | Mitel Networks Corporation |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 中文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 文件頁數(shù)： | 19/36頁 |
| 文件大小： | 836K |
| 代理商： | MH89770S |
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4-143
Preliminary Information
MH89770
Figure 12 - Using the MH89770 in a Parallel Bus Environment
MH89770
MT8920B
(Mode 2)
D
0
-D
7
A
0
-A
5
CS
R/W
OE
MMS MS1 24/32
STo0
STi0
STo1
C4i
F0i
+5V
+5V
MT8977
E8Ko
RxD
RxB
RxA
TxB
TxA
E1.5i
C1.5i
C2i
F0i
CSTi1
CSTo
CSTi0
DSTo
DSTi
CLOCK
EXTRACTOR
MMS
High Speed
Parallel
Telecom Bus
Line
Driver
Rx
Line
Driver
Tx
OUTA
OUTB
RxT
RxR
EQU
DIP
SWITCH
MT8941
CVb
F0i
C2o
F0b
C4b
C8Kb
12.352 MHz
Osc.
16.384 MHz
Osc.
MT89761
Signalling and
Link Control
BUS
IACK
IRQ
DTACK
R/W
DS
CS
A
0
-A
5
D
0
-D
7
STo0
STi0
STo1
C4i
F0i
MT8920B
(Mode 1)
1.544 MHz
MT8976. The signals are combined to produce a
composite return to zero signal which is clocked into
the MT8976 at RxD.
2. Interfacing the MH89770 to a Parallel Bus
The MH89770 can be interfaced to a high speed
parallel bus or to a microprocessor using MT8920B
Parallel Access Circuit (STPA). Fig. 12 shows the
MT8977 interfaced to a parallel bus structure using
two STPA’s operating in modes 1 and 2.
The first STPA operating in mode 2 (MMS=0,
MS1=1,
24/32=0),
routes
information between the parallel telecom bus and the
T1 or CEPT link via DSTi and DSTo. The second
STPA, operating in mode 1 (MMS=1) provides
access from the signalling and link control bus to the
MH89770 status and control channels. All signalling
data
and/or
voice
and link functions may be controlled easily through
the STPA transmit RAM’s Tx0, Tx1, while status
information is read at receive RAM Rx0. In addition,
interrupts can be set up to notify the system in case
of slips, loss of sync, alarms, violations, etc.
3. PCM/Voice Channel Bank
The D3/D4 channel bank is one of the most widely
used pieces of equipment in the North American
network today. The D3/D4 channel converts 24
analog telephone lines into the 24 channels of a T1
serial stream. The channel bank is the interface point
between a digital switching or transmission system
and the analog telephone loop. The industry is
moving towards end-to-end digital connections
(ISDN), but the analog channel bank will still be in
use for many years to come.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MH89790B | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MH89790BN | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MH89790BS | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MH89791 | CEPT PCM 30 Transmit Equalizer Advance Information |
| MH89792-1 | E1 Transceiver Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MH89790B | 制造商:MITEL 功能描述: 制造商:ZARLNK 功能描述: |
| MH89790BN | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information |
| MH89790BS | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ST-BUS⑩ FAMILY CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information |
| MH89791 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CEPT PCM 30 Transmit Equalizer Advance Information |
| MH89792 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:E1 Transceiver Preliminary Information |
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