PLANET VC-810S - Manual (Page 77)

User’s Manual of VC-810S / VC-810S48
77
7. FAQ
Q1: What is the maximum distance for VC-810S (CO Switch) to VC-201(CPE)?
A1: In order to guarantee the stability and better quality of network, so we would suggest the distance within 1 kilometer is
the best for VC-810S and VC-201.
Q2: What is the best date rate for VC-810S?
A2: We provide the data rate of the VC-810 is up to 55Mbps/100Mpbs (upstream/downstream) in 200 meters.
Q3: Can VC-810S compatible with VC-1602?
A3: The OLANET VC-810S is base on ITU-T G.993.2 VDSL2, and VC-1602 is VDSL1, so it can not compatible with
VC-201.
Q4: Can VC-810S compatible with VC-200M/VC-200S?
A4: Currently NO, although VC-810S and VC-200M/200S are base on ITU-T G.993.2 VDSL2, but with different chipset
specification, so far they are not compatible with each other.
Q5: What is SNR and what’s the effect?
A5: 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 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 better line quality, but lower performance.