SB8200 - Configuration Issues - Xfinity/Comcast

As you can see much different signals and download/upload speeds all tested within 30 minutes of each other and yet comcast/xfinity doesn't want to play ball.

Arris response to me below - 

Thank you for your response, we are very sorry about the situation you are going through with signal being unappropriated for your modem. We know how frustrating this is for you and since Xfinity is not wheeling to assist you, we encourage you to call your internet provider again, once you will have them on the line you can make a request to create a conference with ARRIS technical support. We will be more than happy to provide the necessary information to let them provision the service as needed.

Please contact ARRIS Technical Support Center at 1-877-466-8646. We are open 7 days a week 7am - 12am CST.

Your case number is: 1911-16119

For information on ARRIS products, we invite you to visit our website at: http://www.arris.com

Thank you,

ARRIS Technical Support Center

This was the snap shot I sent to Arris of the SB8200 in the ticket response above - 

Thank you for contacting ARRIS Technical Support Center. I will be happy to assist you.

We have encountered that the possible reason of the issue you're experiencing with your internet performance, is due to the lack of power in the Upstream signal. The acceptable range is within 45 dBmV and 51 dBmV, and as you can see, they are all below the minimum.

Please contact the service operator in order to re-provision the service and adjust the signal to the acceptable. Once done, your internet's performance should go back to normal.

If you need immediate assistance or information on ARRIS products, please contact ARRIS Technical Support Center at 1-877-466-8646. We are open 7 days a week 7am - 12am CST.

For information on ARRIS products, we invite you to visit our website at: http://www.arris.com

Thank you,

ARRIS Technical Support Center.

I signed up for the 1Gb service before and I had 3 engineers out to my house and even with a new line to my house from the pole, testing my modem, their modem, I received the same results.  This is not a Modem issue persay, it is a hardware configuration issue with the signals being sent to the modem - It is possible it could be an issue with the Node itself where you are getting your Internet from if you are on an overloaded Node you may never see the speeds regardless of hardware YOU buy. 

I've spent a month or so trying to get someone on the phone who understands the problem...

Here is my DOCSIS 3.0 modem on the 600Mbps service - My tests are within a month of each other last test I completed was 4/25/2020 and had the same results I had today...  the DOCSIS Arris SB8200 significantly lower and signals different as well - I was told by Arris - per my email above in this that the signals Comcast/Xfinity are providing to the modem are too weak to obtain "good connection/download/upload speeds." 

I've also Found that other speed test sites are more accurate at times of load - Comcast Xfinity site always shows less so I test it at several different places:

speedtest.net

speedtest.xinifity.com

fast.com

Try uploading your pics via a link, they are not coming in. My DOCSIS 3.0 modem worked fine as well with the Extreme Pro service (600mbs).  Arris provided a similar response to what you posted.

Let's hope someone can help us out.

I am  having the same issues as well. A tech came out to my home and cleaned up some splitter issues; however, it did not fix much. He advised to wait a week or two for the modem to be provisioned correctly, which did not make much sense to me.

It seems like a lot of folks are having issues with their Arris SB8200 modem and the 1GB offering. My DOCSIS 3.0 router/modem combo clocked around 600mbs on the Extreme Pro; now with the Arris SB8200 my comp clocks 400 on a good day with 1GB. 

I have an Arris SB8200 modem, a Netgear Nighthawk X6S router and a 10/100/1000 ethernet card. My PC is hardwired via Cat5e directly to router. I've run my PC directly to the modem and also have trouble.

https://drive.google.com/file/d/1r-YC0DVHYMaGovIfT5irgwjJlRouBsex/view?usp=sharing

https://drive.google.com/file/d/1A3wARHLrIwHauu95s80iPOmZYCBUPo7F/view?usp=sharing

https://drive.google.com/file/d/19x-R8faFgZ-iux-OH7V3dOTTu9Yj_8Pf/view?usp=sharing

https://drive.google.com/file/d/1zrBh2C6zBB_3MSZ5irrl-EQTaVLmlfn7/view?usp=sharing

https://drive.google.com/file/d/1W0dyACeIh9bcnkllxtTA5C3m7XDb3eyd/view?usp=sharing

https://drive.google.com/file/d/12NRcqgmg2aiFbzviudFGq6Nu2UADlo1x/view?usp=sharing

Thanks for your time.

I've found when posting photo's they take a day or two to show up on the site...  😄

I too saw way too many issues with Comcast and SB8200. Techs came by my house, we checked power levels. Should have worked. After a month of constant issues and disconnects, I finally went back to my SB6183 and no more issues (nor rated BW).  Has comcast done ANYTHING to own up to this issue and fix it in a year? I dont think so.... Meanwhile, I bought an SB8200 that I cant use reliably