Confusion regarding Streamyx SNR and Attenuation,

Greetings all, went into my office today where I have just had internet installed and ran this from the router


Line Rate - Upstream (Kbps): 512
Line Rate - Downstream (Kbps): 2048
SNR Margin - Upstream (0.1 dB): 300
SNR Margin - Downstream (0.1 dB): 303
Attenuation - Upstream (0.1 dB): 20
Attenuation - Downstream (0.1 dB): 185

I did read the following post
Explaination

But am still a little confused as the downstream seems crazy high etc.

Any advice and stuff would be appreciated.

Thank you.