Interlogix MC250-4T/1CXT - Manual (Page 23)

IFS MC250-4T/1CXT User Manual 17
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.
Q6: What is band plan and what’s the effect?
A6: VDSL2 defines multiple band plans and configuration
modes (profiles) to allow asymmetric and symmetric services
in the same binder (by designated frequency bands) for the
transmission of upstream and downstream signals. User has
the ability to select fixed band plan. Symmetric band plan
provides better downstream performance while Asymmetric
band plan provides better upstream performance.