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參數(shù)資料
| 型號： | MT90503 |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | 2048VC AAL1 SAR |
| 中文描述： | 2048VC AAL1特區(qū) |
| 文件頁數(shù)： | 230/233頁 |
| 文件大小： | 1341K |
| 代理商： | MT90503 |
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MT90503
Data Sheet
230
Zarlink Semiconductor Inc.
10.0 Glossary of Terms
AAL0: A
TM
A
daptation
L
ayer
0
. AAL0 is a straight packaging of 48 bytes of data within an ATM cell. AAL0 can be
used to treat either data cells (managed by CPU) or CBR cells (managed by TX/RX SAR).
AAL1: A
TM
A
daptation
L
ayer
1
. AAL1 is used to transport constant bit rate (CBR) data on ATM. The main features
of AAL1 are a cell sequence number that allows the detection of lost cells and a p-byte that allows reconverging of
multi-channel VCs.
AAL5: A
TM
A
daptation
L
ayer
5
. The main feature of AAL5 is a 32-bit CRC at the end of the cell that allows the
detection and correction of errors in the data payload. In this design, AAL5 cells are used uniquely to treat CBR
information.
ATM: A
synchronous
T
ransfer
M
ode. ATM is a networking standard based on 53-byte cells and is capable of
carrying voice, data and video information simultaneously.
CAS: C
hannel
A
ssociated
Signalling
. Signalling bits used to indicate the state of the channel.
CBR: C
onstant
B
it
R
ate. Cells in CBR format are sent out at a regular rate. CBR is applicable to voice channels.
CDV: C
ell
D
elay
V
ariation. When cells arrive on a UTOPIA port, they arrive with a certain delay with respect to
when they were sent. CDV is a measure of how much that delay varies on a VC.
CLP: C
ell
L
oss
P
riority. A 1-bit field in the ATM cell header that corresponds to the loss priority of a cell; cells with
CLP = 1 can be discarded in a congestion situation.
CNT
:
C
ounter. Events in the MT90503 will cause the counter to increment.
CRC: C
yclic
R
edundancy
C
heck. The CRC is a method of error detection and correction that is applied to a certain
field of data. CRC is an efficient method of error detection because the odds of erroneously detecting a correct
payload are low.
DS1: D
igital-
S
ignal Level
1
. DS1 is an electrical interface for digital transmissions that contains 24 64-Kbps
channels. The physical interface defined to carry DS1 channels is T1.
E1:
E1 is the European equivalent of T1. They are similar with the main difference being E1 runs at 2.048 MHz
instead of 1.544 Mbps, carrying 30 64kbps channels.
ESF: E
xtended
S
uper-
F
rame. ESF is a T1 format that defines multiframes as consisting of 24 frames, each one of
which contains 1 byte per channel.
FASTCAS:
FASTCAS is not an acronym. It is capitalised in this document because it is a reserved word. FASTCAS
means that multiframe integrity is not respected between the TDM and ATM buses. The TDM data is processed as
soon as it is received, while CAS is sent when it is available.
FIFO: F
irst
I
n,
F
irst
O
ut. A FIFO memory is one in which the first byte to have been written into the memory is the
first one to be read from the read port.
GFC: G
eneric
F
low
C
ontrol. The GFC field is kept in the 4 highest bits of an ATM cell’s header and is used for local
functions (not carried end-to-end). The default value is "0000", meaning that GFC protocol is not enforced.
GPI:
G
eneral
P
urpose
I
nput
GPI/O:
G
eneral
P
urpose
I
nput or
O
utput
H.100/H.110
: A TDM bus standard developed by ECTF to provide backward compatibility to existing TDM buses
with more bandwidth and potential for development.
HEC: H
eader
E
rror
C
heck. Using the fifth octet in the ATM cell header, ATM equipment may check for an error and
correct the contents of the header. A CRC algorithm allows for single-error correction and multiple-error detection.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT90503AG | CLIP, STRAIN RELIEF, 50WAY; For use with:820 Series Tripolarized Wiremount Sockets; Ways, No. of:50; Material:Metal; Connector type:Strain Relief RoHS Compliant: Yes |
| MT90520 | 8-Port Primary Rate Circuit Emulation AAL1 SAR |
| MT90520AG | 8-Port Primary Rate Circuit Emulation AAL1 SAR |
| MT9072 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| MT9072AB | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT90503AG | 制造商:Microsemi Corporation 功能描述: |
| MT90520 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:8-Port Primary Rate Circuit Emulation AAL1 SAR |
| MT90520AG | 制造商:Microsemi Corporation 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays |
| MT90520AG2 | 制造商:Microsemi Corporation 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays 制造商:Zarlink Semiconductor Inc 功能描述:ATM SAR 2.048MBPS 2.5V CBR 456BGA - Trays |
| MT90528 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:28-Port Primary Rate Circuit Emulation AAL1 SAR |
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