E Glossary - Huawei NE40E-X1 Hardware Description

HUAWEI NE40E-X1 & NE40E-X2 Universal Service
Router
Hardware Description
A
Asynchronizatio
n
D
DCE
DRAM
DTE
E
EMC
F
Flash
N
Issue 02 (2011-09-10)
Asynchronization does not use the exact data signals timed by the clock.
The signals have different frequencies and phases. The asynchronizatioin
usually encapsulates the bits into the control flag, which specifies the
beginning and end of the bits.
Data Circuit-terminating Equipment is a network device composing the
UNI. DCE provides the physical connection to the network, forwards the
data, and provides the clock signals for the DTE.
Dynamic Random Access Memory. The information stored in the RAM
must be refreshed periodically. When the contents of the DRAM are being
refreshed, a user cannot access it. Delay can thus occur.
Data terminal equipment is a user device composing the UNI. The DTE
accesses the data network through the DCE equipment (for example,
model) and usually uses the clock signals produced by DCE.
Electro magnetic compatibility is the condition which prevails when
telecommunications equipment is performing its individually designed
function in a common electromagnetic environment without causing or
suffering unacceptable degradation due to unintentional electromagnetic
interference to or from other equipment in the same environment.
Flash is a kind of special Erasable Programmable Read Only Memory
(EEPROM), which can be completely erased and rewritten one time
instead of only one byte.
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