linzhihong
2009-06-29, 11:12 AM
今天升級了 seednet 10M/2M 光纖,中華電信派人來安裝 vdsl zyxel
p-870HA ,但發現了一個奇怪的事,可供裝上傳竟然可達 232.922 Mbps,
但下載只有 41.532 Mbps ,這是怎麼回事???
============================================================================
VDSL Training Status: Showtime
VDSL Profile: PROF_17A
Traffic Type: PTM
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 7.682 Mbps 15.919 Mbps
Actual Net Data Rate: 2.047 Mbps 10.048 Mbps
SNR Margin: 30.2 dB 27.2 dB
Actual Delay: 7 ms 7 ms
Transmit Power: 9.3 dBm 7.8 dBm
Receive Power: -20.3 dBm -5.7 dBm
Actual INP: 26 symbols 26 symbols
Total Attenuation: 24.6 dB 13.6 dB
Attainable Net Data Rate: 232.922 Mbps 41.532 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
SNR Margin(dB): N/A 30.2dB N/A N/A 27.2dB 27.4dB N/A
Signal Attenuation(dB): N/A 24.6dB N/A N/A 13.5dB 39.5dB N/A
Line Attenuation(dB): 6 .5dB 30.0dB 47.8dB N/A 13.5dB 39.5dB 53.7dB
Transmit Power(dBm): N/A 4 .3dBm 122.8dBm N/A 7 .7dBm-7 .9dBm N/A
============================================================================
p-870HA ,但發現了一個奇怪的事,可供裝上傳竟然可達 232.922 Mbps,
但下載只有 41.532 Mbps ,這是怎麼回事???
============================================================================
VDSL Training Status: Showtime
VDSL Profile: PROF_17A
Traffic Type: PTM
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 7.682 Mbps 15.919 Mbps
Actual Net Data Rate: 2.047 Mbps 10.048 Mbps
SNR Margin: 30.2 dB 27.2 dB
Actual Delay: 7 ms 7 ms
Transmit Power: 9.3 dBm 7.8 dBm
Receive Power: -20.3 dBm -5.7 dBm
Actual INP: 26 symbols 26 symbols
Total Attenuation: 24.6 dB 13.6 dB
Attainable Net Data Rate: 232.922 Mbps 41.532 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
SNR Margin(dB): N/A 30.2dB N/A N/A 27.2dB 27.4dB N/A
Signal Attenuation(dB): N/A 24.6dB N/A N/A 13.5dB 39.5dB N/A
Line Attenuation(dB): 6 .5dB 30.0dB 47.8dB N/A 13.5dB 39.5dB 53.7dB
Transmit Power(dBm): N/A 4 .3dBm 122.8dBm N/A 7 .7dBm-7 .9dBm N/A
============================================================================