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I am Using SB8200 with Xfinity.
1000Mbps d/l and 100 Mbps u/l plan

my speeds are slow

downstream is in 3.1 mode upstream is in 3.0 mode. There are four upstream bonded channels. The power values are 37 and 38 dBmV.

down stream bonded channels have SNR in the ranges of 45.3 to 46 dB. The QAM256 power values are between 2.9 DBMV and 3.4 DBMV and the last one is 4.3 DBMV

is this correct?

I am Using TP-Link ax1800 router and am getting 300Mbps on its wired ports.

wireless point gives 430Mbps.

Pls comment.

also, why is the upstream in 3.0 mode and not 3.1

 

Since you are experiencing with slow speed internet issues in SB8200 and you already shared the cable signal levels.

For the upstream channels, power level should be greater than 45dbmv.

Since it’s not in range, I request you to contact your ISP to adjust the cable signals in range to fix this issue.

Please check the link for your reference given below:

http://arris.force.com/consumers/articles/General_FAQs/SB8200-Cable-Signal-Levels

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