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:
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 |