S33 | S34

I have Spectrum Internet and get excellent and reliable speeds with my Arris S33 modem. For the last few months in Zoom meetings my screen freezes (everyone except me) and I have no audio. In a minute or so it comes back and I get a Zoom error message “Your Internet connection is unstable.” During these freezes I have tested my connection with Speedtest and with other browser windows. The problem is only in Zoom. I have used Zoom on my MacBook Pro and my Dell XPS 15 laptops and get the same behavior.The Zoom help is no help. Spectrum insists there is no problem and they can’t help because I am not using their modem. The S33 has current firmware. (And I have rebooted the modem, the Amplifi router, and all other pieces of equipment in my cabinet multiple times). Can anyone help? Thanks.Edit: I found an forum article instructing a user of another modem to check cable signal levels. I could not found the docs for the S33 but Bing AI tells me:Downstream Power Level: -15 dBmV to +15 dBmV for

My S33 is making an awful high pitched noise and the LED is going between Amber and white. I am guessing, from reading other posts, that my modem is a brick. I cannot even find a place for chat tech support or to begin a warranty claim. 

Modem staying connected to internet but won’t stop constant high pitch squealing sound. Been a few days now. 

S33 solid blue following a xfinity outage and won’t change after a button reset 

This is something I’ve noticed recently, but during a zoom, video stream or even playing video games there is a bit of a blip that reconnects 10-15 seconds later.This is paired with an Asus Orbi RBR850.Something very interesting to note… every 10 minutes (exact), the led light on the modem switches from green to blue and vice versa. Looking at the user guide the modem is switching docsis mode? Why is that? I’ve reached out to Xfinity for assistance,  but I’ve already attempted to rest both appliances with no avail. Any help would be greatly appreciated… Thank you.

I bought my Arris S33 modem July 4 2022 through Amazon for over $300.00less than two years have gone by (07/04/2022 - 01/26/2024) and my warranty with Arris is already expired according to their website. I have been experiencing a lot of problems staying connected to the internet even though I usually get nice speeds when I am connected.  I went to my ISP, Optimum, and the front counter associate checked out my modem and let me know it was causing the intermittent issues due to 4 bad channels out of the 32 channels it has.  He then explained to me that the modem most likely does not have anyway of just turning off the 4 bad channels.  So, my question is can I fix my modem such as turning off the 4 bad channels it has, or can I still return my modem to Arris to have them fix and/or replace it even though it’s no longer under warranty? Thanks for any help in advance.

Bought this modem thinking it would bring my download speeds close to the 2000 Mbps rated comcast Xfinity speed I subscribe to, but I am only able to get around 718 Mbps down and 5.8 up. After several attempts at trying to play with settings, OS, and multiple computers, I called in for support through Comcast. They tried their best with their magical keyboard skills, to no avail. Finally, a service technician was sent to determine the issue. After doing many more tests to coax cable, modem, router, cat5e & 6 cables, technician determined that the issue was at the modem.He was able to show me on his device that the speeds coming in all the way to the modem were in fact 2247 Mbps down and 386 up. Unfortunately, there was no resolution, and the return window on Amazon has expired.If anyone has found a way of increasing speeds, please share. Thx.

I recently installed S33 to take advantage of Comcast 2G+ package. After a few hours with various teirs of comcast tech support, it was concluded that the S33 can’t be configured to work at the expected speeds.I have been a satisfied owner of the SurfBoard T25 and hoped the S33 would deliver the same satisfaction but sadly, this is not the case. Upload speeds of 5Mbps just does not do it. The findings were that a “Boot file” Comcast use to activate the CM reports itself as “INVALID”.Arris - please work this issue out with Comcast or stop advertizing the S33 as Comcast compatible so other customers are not misled.Thanks. 

Surfboard central wont open 

My S33 modem is working fine but makes a lot of noise - a constant fluttering/chirping/skipping sound. I’ve had it for about a year but recently moved it close to my desk where it’s driving me crazy. Is this normal? Are there other routers on the market that are quiet? I use Xfinity. Thanks.

Will no longer connect to internet after an Xfinity outage. Infinity can’t see it. 

Hi I’m trying to connect to the wifi but it keeps telling me to make sure I’m on the home wifi network when my internet is plugged into the arris modem 

Purchased modem in July of 2023.Modem would stop working about once every other month, and i would unplug for a couple of minutes, plug back in and it would work fine. Did it again on Monday and now i only get solid white light. Will not reset. Please advise.

My S33 is still under warranty, and Arris has already provided me with a shipping label to replace the device due to an issue. However, I'm concerned about whether the replacement will be new or refurbished. I'm a bit wary of receiving a refurbished device because it could potentially have modified firmware or undisclosed issues that Arris hasn't detected. It would be frustrating to receive a replacement only for it to break down after a year or so.

I was considering the S33 for my GB Xfinity connection.While checking out the S33 on the Arris website I noticed the S34. It looks like it might be based on the S33 but firmware optimized for faster uploads. The description page states “ Next Generation Upload Speed Optimized” where the description page for the S33 does not.If I click “Buy Online Now” on the S34 page I get redirected to a page suggesting I add an S33 to my cart.Is the S34 an available product? If not, when will it be available?Thx in advance.

I just installed and set up an Arris Surfboard S33. We are running Windows 10 on our PCs. When I go to the Surfboard Management console at 192.168.100.1 and enter “admin” and “password:” as instructed by the user manual, I get an error message that the username and password are not correct. This happens with all browsers. Can anyone provide any guidance, assistance or correct instructions? Thank you.

S33 & Xfinity gigabyte plan Past few days  I have been experiencing frequent outages. Usually a reboot of the modem and routers resolves it but the past few times the speeds are not coming back to what they should be. I took a look out the downstream channels and saw a lot of corrections and uncorrectable(s). This screen shot was taken with a modem uptime of about 20 minutes.   Spoke with Xfinity rep and basically said everything is good on their end and to contact manufacturer.  If anyone could provide any suggestions I am all ears. 

Like most I’m on Xfinity with my own S33 modem. I updated my service to an 800Mbps/100Mbps plan and haven’t been able to get anywhere higher than 11.8Mbps uploads on the Xfinity speedtest site. A tech came out and ran a new line today and we removed a splitter that was no longer needed and he said the signal levels were much improved. The only thing I’ve seen improve so far is the number of correctable and uncorrectable errors on channel 1 have gone away with the new line. Otherwise, the power levels on the upstream connection actually seem to have dropped (maybe that’s ok) from 47.5 dBmV to 43.0 dBmV. I’m still not getting any higher than the 11.8Mbps even though I’d expect to at least hit 20Mbps if they still haven’t opened up support to 100Mbps to the S33.Here are the levels from the modem status page after the new line was installed (and splitter removed). Does anything stand out as a problem? Xfinity support replied that they’re showing downstream SNR is at 44.5 and your upstream

I bought a new, factory sealed S33v2 but Xfinity (Comcast) was unable to provision it as the MAC address was already in use. How can that be?

Nov 2023 installed ARIS S-33 modem. Data usage went from an average of 350Gb/month to 1323Gb/month for Nov & Dec 2023 and Jan 2024.No changes in data intensive activity, no gamers. Only change is went to Hulu Streaming TV and dropped Xfinity Cable TV.Any ideas why this would happen?

What version do I have? The info page shows "NA". How do I perform an update? 

So I had a S33 for a few months, then it stopped working. Arris sent a replacement. The new one won’t connect at all. I worked with Xfinity for over an hour trying to get it connected and they told me there was a Docsis error on the modem. So I’m using a rented Xfinity modem now and it works perfectly.I called Arris about just sending theirs back for a refund but I was told that was impossible since it was a replacement. They want to go through troubleshooting before they’ll even offer any recourse.I am done with Arris I think. After going through two bad modems I just want a refund. Will they offer a refund if I go through troubleshooting with them and it still doesn’t work or will they just send an endless stream of replacements until my warranty runs out?

Tried to activate an Arris S 33 with Xfinity, Xfinity said that my old 6190 modem is too slow for my internet speed, and I needed to upgrade.  My modem won’t activate, I have tried many times using the app, the light flashes green, and after 11 minutes the app says it couldn’t find the modem.  I hooked up a computer to the modem and on the status page is says security failed, and Docsis network access enabled, Status Denied.  Today, Xfinity came out to check my lines, I had a weak signal, they replaced lines and connectors and when the tech was done, I had a great connection.  He tried many times to activate the modem and couldn’t.  He finally called his tech people.  The tech lady tried to activate the modem on her side and said that it showed active, but wasn’t connected.  She said that she couldn’t see an IP address for this modem, and because of that, couldn’t activate the modem.  She told me to contact Arris and see if anyone has had this problem and how to fix this problem.  This

I posted on here a while back about my S33v2 randomly rebooting several times a day. I have been chatting with some Xfinity agents on Reddit and they lead me to an interesting discovery. While the S33 is on the list of recommended devices, the S33v2 is merely listed as compatible and not recommended. According to the internet, the v2 was released in mid-2021. Despite a different chipset and firmware, there is little difference between the two. Why has Xfinity not certified the v2 version in the last 2.5 years when it is clearly the newer product and probably the only one you can actually buy for the last 2.5 years?My issue is clearly something to do with this modem as I had been using Xfinity’s XB8-T modem for the last month and had zero issues.Is there anything I can do about this except just keep using the XB8-T and eating the $15 bucks a month?If they havent certified the S33v2 in 2.5 years, is there a decent chance they will ever do it?Thanks

Hi , I just returned my Xfinity Arris modem and got a SurfBoard S33. I have LinkSys mesh routers in both the cases that work OKI have noticed early morning the Wifi connection does not work and Internet starts to works about 5 mins after connecting.  Can you pls suggest an fix for this ? Is there any upgrade that needs to be done as I bought this SurfBoard from Amazon ?? Thanks in advance