Planet VC-202 Инструкция по эксплуатации онлайн [31/32] 65615

Q6: Can VC-201 compatible with VC-200M / VC-200S?

A6: Currently NO, although VC-201 and VC-200M/200S are

base on ITU-T G.993.2 VDSL2, but with different chip-

set specication, so far they are not compatible with

each other.

Q7: What is SNR and what’s the effect?

A7: In analog and digital communications, Signal-to-

Noise Ratio, often written SNR, is a measure of signal

strength relative to background noise. The ratio is usu-

ally measured in decibels (dB).

In digital communications, the SNR will probably cause

a reduction in data speed because of frequent errors

that require the source (transmitting) computer or ter-

minal to resend some packets of data. SNR measures

the quality of a transmission channel over a network

channel. The greater the ratio, the easier it is to iden-

tify and subsequently isolate and eliminate the source

of noise.

Generally speaking, the higher SNR value gets better

line quality, but lower performance.