ADSL, VDSL and splitter filters, comparison with Savp120
We installed and tested the DSL link with and without filters and with a splitter the Enerdom SAVP120, the signal improvement (SNR) is remarkable (about 18%)
The data are similar on VDSL and ADSL, one being the evolution of the other, ADSL being less fast (up to 25MB) suffers less from disturbances than VDSL, but the installation of the splitter, compatible with both types of line, still ensures maximum performance and line stability
Fastweb VDSL Attenuation SNR and Line Quality.
On the first modem/router connection, we recorded an SNR(signal-to-noise ratio) of 6.2 dB with attenuation 20.7 dB in download and upload SNR 12 dB and attenuation 18.5 dB
ADSL/VDSL Filters and Splitters.
To improve signal quality, given VDSL2's sensitivity to noise, it is best to use filters under telephones or a VDSL2 splitter such as theEnerdom SAVP120 (which we highly recommend) by splitting the data frequency from the telephony frequency
They are hard to find at stores, we have never come across them, you can however buy them online for 16€ + shipping:
Edit 9/11/20, Enerdom's domain is no longer reachable, they are however available on Amazon
This data is visible for those who have the ADB Broadband modem/router at:http://?if=1&backto=settings/phyif
or in the detailed DSL interface statistics (depends on the brand of modem)
Screenshot VDSL line statistics
Classic ADSL filters on VDSL
During our test we tried with classic (poor quality) filters to improve the signal but with poor results, the improvements were in our test almost imperceptible
VDSL splitters
We evaluated various splitters and the choice fell on the Enerdom SAVP120, which is the evolution of the famous ADSL splitter, HR SAP001 or CLSP-008M, for VDSL2, but also works on ADSL2
Enerdom SAVP120 VDSL Splitter Installation.
Installation is simple, for those who will plug it into a wall box just strip the pairs slightly and insert them into the left push terminals keeping in mind that the first 2 positions are dedicated to the incoming line
Those using RJ11 telephone plugs will be able to conveniently use the sockets on the right
Detailed installation enerdom ADSL/VDSL splitter
Installation results enerdom SAVP120
Special thanks to the guys at HWUpgrade, the valuable information
Conclusions
The result was beyond expectations, several customers of our services adopted the splitter and solved most of the internet line drops, greatly improved signal and speed
Update
Enerdom no longer seems to be active, for those looking for a VDSL2 filter there seems to be Chinese Corelogic products, such as the Clsi-027m2CPE for now however we have not been able to get in touch with the manufacturer
