@David-TP I am not sure what ISPs model number means. My ISP is Vodafone but DSL owner/maintainer is CETIN. DSL is unstable mainly in the evening. Probably because of hight DSL line load. I tried...

I switched from old dsl modem to DECO X50-dsl. I never had problems with my dsl connection. But with this modem connection lags a deco shows high packet loss. I think that the problem is in bad SNR...