Re: [閒聊] 數據機到機房的最大物理頻寬數值分享
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 3.253 Mbps 54.492 Mbps
Actual Net Data Rate: 3.200 Mbps 54.397 Mbps
Trellis Coding: ON ON
SNR Margin: 30.2 dB 21.8 dB
Actual Delay: 7 ms 7 ms
Transmit Power: 11.4 dBm 13.7 dBm
Receive Power: 5.7 dBm 8.6 dBm
Actual INP: 26.0 symbols 26.0 symbols
Total Attenuation: 0.9 dB 5.1 dB
Attainable Net Data Rate: 0.518 Mbps 109.696 Mbps
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我看大家都說Attainable Net Data Rate代表線路可供裝的最大速率,
可是我進我的數據機看數據如上,我去SPEEDTEST測速,
下載最大可到52Mbps,上傳可到2.92 Mbps,
我是用HINET的50M/3M,光化箱離我家不到100M。
不過數據我覺得很怪的是上傳的SNR有30算不錯,
Total Attenuation也只有1 dB不到,那為什麼Attainable Net Data Rate
上傳卻連1 Mbps都不到。
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