VC-400LT/RT+ VDSL2 CO&CPE Router MANUAL Ver.B3
20
6.1.2 Line Configuration
Figure 6.1.2 Line Configuration Menu for SNR Margin Selection
Line Configuration
Setting
Description
Direction
Select the target direction.
Target SNRM
Set the required SNR Margin *10
(60=6dB)
Note:
Noise Margin is the non-technical term for Signal to Noise Ratio Margin (SNRM). Domestic
standard modems and VDSL2 routers often use the terms Noise Margin or SNR when reporting on
its value. The Signal to Noise Ratio, as its name implies, is the ratio between the strength of the
signal and the level of noise on the line.
That ratio is a major factor in determining the connection speed, as the higher the ratio the higher
the possible speed. The SNRM is a margin which by which the noise level can rise before
connection is lost.
Taking the default (target) value of 6 dB applied is follow up telecom standard. Basically, you don't
need adjust this value.
6.1.3 Profile Configuration
For this function, VC-400LT/R provides world wide telecom standard band plan, such
as meet European telecom standard band plan 998(17a), USA telecom standard band
plan 997(8a, 8b) and APAC Telecom standard band plan (30a) etc.
Annex A specifies bandplans for the North American region and enables VDSL2
ROUTER to be deployed with traditional POTS telephony or in an all-digital
mode.
Annex B specifies bandplans for Europe and enables VDSL2 ROUTER