2 Digital subscriber line VDSL2
2.10 Frequency plans for symmetrical data transfers

Usage of symmetrical data transfers is especially developed for small and medium-sized companies whose employees need data from the Internet not only download but also quickly upload. An example of service with symmetric transmission speeds may be more popular video, which was organized instead of conventional workshops.

It was noted in the previous chapter that it determined for symmetrical data transfer the fundamental frequency plan 997. This plan is further divided into next parts:

Example of 997E frequency plan parameters for each profile VDSL2 connections in Europe.

VDSL2 profiles

The highest utilized subchannel

Upper limit frequency for downstream [MHz]

Upper limit frequency for upstream [MHz]

8a

2047

7,05

8,832

8b

2047

7,05

8,832

8c

1182

7,05

5,1

8d

2047

7,05

8,832

12a

2782

7,06

12

12b

2782

7,05

12

17a

4095

14

17,664

30a

3478

27

30

image
Substitution each band in frequency plans for symmetrical data transfers.