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8. FAQs
Q1: What is VDSL2?
A1: VDSL2 (Very High-Bit-Rate Digital Subscriber Line 2),
G.993.2, is the newest and most advanced standard of
xDSL broadband wire line communications. Designed to
support the wide deployment of Triple Play services such as
voice, data, high denition television (HDTV) and interac-
tive gaming, VDSL2 enables operators and carrier to gradu-
ally, exibly, and cost eciently upgrade the existing xDSL-
infrastructure.
Q2: What is SNR and what’s the eect?
A2: In analog and digital communications, Signal-to-Noise
Ratio, often written as SNR, is a measure of signal strength
relative to background noise. The ratio is usually 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 terminal 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 identify and subse-
quently isolate and eliminate the source of noise.
Generally speaking, the higher SNR value gets, the better
the line quality gets, but performance is lower.
Q3: What is the best distance for the VDSL2 Bridge?
A3: In order to guarantee the stability and better quality of
network, we suggest the distance should not exceed 1.4
kilometers.
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