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 definition
television (HDTV) and interactive gaming, VDSL2 enables operators and carrier to gradually, flexibly,
and cost efficiently upgrade the existing xDSL-infrastructure.
Q2: What is SNR and what’s the effect?
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 subsequently 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 EVC-3101?
A3: In order to guarantee the stability and better quality of network, we suggest the distance should not
exceed 1.4 kilometers.
Q4: What is the best data rate for the EVC-3101?
A4: The best data rate of the EVC-3101 is up to 190Mbps/100Mbps (downstream / upstream) in
asymmetric mode and 150Mbps/150Mbps in symmetric mode over a distance of 200 meters.
Q5: Why it is not workable when I set ADSL2/2+ device to be CO and set EVC-3101 to be CPE?
A5: Because EVC-3101 must be set to CO and ADSL2/2+ must be set to CPE.
