Frequency Band Plan; Vdsl2 Profiles - ZyXEL Communications MSC1000G User Manual

Chapter 9 Subscriber Port Setup Screens

9.2.3 Frequency Band Plan

Each VDSL mode operates in a different frequency band allocation, resulting in different upstream
and downstream speeds. Your system automatically changes the band plan based on the loop
condition and loop length.
A band plan example is shown next. Band plans include an optional band (between 25 kHz and 276
kHz) controlled by "limit PSD mask".
The optional band is used for upstream transmission which is to be negotiated during line initiation.
The optional band frequency (for example, x and y) varies depending on the limit PSD mask you
use.
Figure 125 A Band Plan Example
US0
y
x
A sample of optional band PSD masks and associated frequency bands used in the Device is shown
next.
Table 88 Optional band PSD Mask
LIMIT PSD MASK
nus0_d32
eu32_d32
eu36_d48
. . .
The "eu" number in the limit PSD mask is a tone index. A tone spacing, 4.3125 kHz, is used for
VDSL2 profile from 8a up to 17a. So "eu32" means the optional band ending at around 138 kHz.
See Section 9.8.4 on page 234

9.2.4 VDSL2 Profiles

The following table lists the supported Annex A VDSL2 profiles defined by the VDSL standard. Refer
to the ITU G.993.2 specifications for more information on other profiles. The VDSL2 profiles
available in an individual VDSL2 line card varies.
Table 89 Supported VDSL2 Profiles (Annex A)
PROFILE
Bandwidth (MHz)
Tone
Tone Spacing (kHz)
Line Power (dBm)
206
US1
DS1
5.2
3.75
OPTIONAL BAND FREQUENCY
= No optional band
= 25 ~ 138 kHz
= 25 ~ 155.25 kHz
for a list of PSD masks.
8A 8B 8C
8.5 8.5 8.5
1972 1972 1972
4.3125 4.3125 4.3125
+17.5 +20.5 +11.5
DS2 US2
8.5
8D 12A 12B
8.5 8.5 8.5
1972 1972 1972
4.3125 4.3125 4.3125
+14.5 +14.5 +14.5
Management Switch Card User's Guide
Frequency
12
(MHz)
17A 30A
17.66 30
4096 4096
4.3125 4.3125
+14.5 +14.5