F Glossary - Huawei NetEngine40E Hardware Description

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HUAWEI NetEngine40E Universal ServiceRouter

Hardware Description

Asynchronizatio

Issue 01 (2012-09-30)

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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