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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)： | 22/36頁 |
| 文件大?。?/td> | 836K |
| 代理商： | MH89770S |
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4-146
MH89770
Preliminary Information
5. Digital Access Cross Connect System
(DACS)
The Digital Access Cross Connect System (DACS) is
a T1 switch with 127 T1 lines as input and output
plus one T1 line that is reserved for test and
maintenance purposes. A DACS is capable of
switching any input channel on any T1 trunk to any
output channel on any T1 trunk.
There are four main blocks in Figure 15, the T1
interfaces, the switch matrix, the control matrix, and
the clock generator. The digital trunk interface is
made up of the MH89770 plus the additional
components required to interface to the transmission
line. The MH89770 handles all of the required
transmit and receive data formatting, and converts
the 1.544 MHz serial stream into ST-BUS format so
that it can be routed through the MT8980
synchronous switch matrix.
The switch matrix can be built so that the maximum
throughput delay is 1 frame +2 channels. The switch
matrix will not only route data channels to their
destination, but it will also route the received
signalling bits through to the destination channel.
This is necessary because the receiving MH89770
decodes the T1 stream, and the transmitting
MH89770 has to reconstruct the outgoing T1 stream.
In other words, there is no multiframe integrity
between received data and transmitted data. The
total throughput delay is one frame plus ten ST-BUS
channels for the MH89770 receiver, 2.5 ST-BUS
channels for the MH89770 transmitter, and one
frame plus two ST-BUS channels for the switch
matrix for a total of 2.5 frames worst case.
Figure 15 - Digital Access Cross Connect System (DACS)
AA
AA
AAAA
AAAA
AAAA
DPLL #2
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
Switch
Matrix
M
I
C
R
O
Control
Matrix
MT8980
MT8980
MT8941
DPLL #1
MH89770
MH89770
DSTi
DSTo
T1 Interfaces
Clock
Generator
izer
Equal-
izer
CSTi0
CSTo
CSTi1
C2i
F0i
C1.5i
OUTA
OUTB
RxT
RxR
E8Ko
DSTi
DSTo
CSTi0
CSTo
CSTi1
C2i
F0i
C1.5i
OUTA
OUTB
RxT
RxR
E8Ko
STi7
STo7
STi0
STo0
F0i
C4i
F0i
C4i
STi7
STo7
STi0
STo1
STo2
STo0
F0i
C4i
C2i
C1.5i
CVb
F0i
F0b
C4b
C20
C12i
C16i
C8Kb
12.352
MHz Osc.
MHz Osc.
16.384
Equal-
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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