S33 | S34

Modem not maintaining connection and overheating as well warranty is still in effect.

Hello, I have an S33 modem with Spectrum internet. The spectrum tech installed the modem and it has been hooked up to a wireless router and working fine with all wi-fi connections. After the install I connected the modem directly to a network switch and the wireless router still works fine. However I have connected an NVR home security system to the switch that requires direct ethernet and it wont connect. I called the security camera support and they are telling me that the direct line is IPV6 and it needs to be IPV4 to work. I am also experiencing no internet connection my wired Samsung smart tvs. Is there an easy fix?

Years ago, when I set up my S33, I turned the LED off. Now I want it back on. I was mistaken that a hard reset would do that. I'm kind of surprised that it didn't.I downloaded and installed the web manager. No joy there because the app can't find the modem (?!?).So... What's the trick?

I'm an Xfinity internet customer experiencing an issue with my modem's upload speed. While my download speeds are good (around 450 Mbps), the upload speed is erratic, ranging from 0.1 to 1 Gbps within a short time frame.A technician visited my house and checked the coax connections and modem performance. Although they didn't find any obvious issues, they suspected a possible hardware failure within the modem. They temporarily installed a different cable modem, and the upload speed stabilized significantly.The modem I'm currently using is an Arris model purchased in February 2021. Given the technician's suspicion and the temporary fix, I'm considering replacing the modem. However, I'm unsure if this is a common issue with Arris modems or if 3 years is the typical lifespan for such devices.I'd appreciate any advice on whether to replace the modem and what brand/model to consider

Can i use S 33 modem with a 300 mps internet plan now. Possible upgrade to 1 gb plan in future..   

Hello - I recently purchased an S33 and have it configured as follows: Spectrum -- S33 -- SFP+ -- Unifi Dream Machine Pro WAN port The SFP+ is a 1-2.5-5-10G model from Ubiqiti. This configuration works just fine when I plug into the 1G port of the S33.  However, when I plug it into the 2.5G port, I get….nothing...no LEDs light up on the Unifi port at all.  The LEDs on the back of the S22 are solid green and amber.  I have tried multiple cables (currently using 0.5m of class 6E), rebooting both the modem and the router, etc., but nothing seems to work.   One other thing that might be relevant is that when it was originally provisioned it was done on the 1G port.  I called Spectrum, and they said that provisioning one port or the other wasn’t something that they did anyway. So, the question is:  how do I “enable” the 2.5G port? Thanks for your help!!

I posted in here a few months ago about some trouble I was having with my S33. Xfinity ended up coming out and replacing the line from the box to my house and everything has been great until a couple days ago.The random reboots are back. I spent about 3 hours on the phone/chat with Xfinity and they are telling me nothing is wrong on their end and that I needed to contact Arris. I have no splitters or anything else in the way. The Xfinity guy ran the new cable into the basement. We put a brand new coupling on the end, and a brand new cable running to the modem. That is the only coax I use in the entire house. The line from the street goes directly to the modem.I am not sure what is causing these new random reboots, but I suspect I just have a bad modem and need to get a replacement. Its pretty easy to find S33 random reboot topics on the internet, but not a whole lot of fixes.Hopefully someone on here can steer me in the right direction.Thanks

I have been getting 80-120 Mbps on a 1200 Mbps Xfinity service. Yesterday I was told my old Arris is no longer supported, so I replaced with a new Arris S33. My home is 2 stories and ~3500 square feet. My modem and router are upstairs in a bedroom centrally located. I have a Deco M5 Mesh network with 3 stations - one in the bedroom upstairs near the router and two downstairs to reach the rest of the house. With the replaced router, I get 350Mbps in the bedroom and directly below it when testing speed on my iPhone 15 and brand new HP laptop.  I am unable to get my laptop to recognize the Ethernet network when I plug directly into the Arris modem, but it works fine when I plug into the connected Deco router. When I move into the bonus room over the garage, the speed drops by 65% to around 120Mbps. There is an electrical fuse panel below the bonus room and past that panel is where the speed seems to drop significantly. I have run all of the power setting tests that I found in a moderat

SERVICE PROVIDER = COX, 2GB SUPER FAST SERVICECABLE MODEM = ARRIS S33, connecting to the router using the 2.5 Gbps portROUTER = NIGHTHAWK XR700 In order to get the use out of 2.5Gbps service from COX, I have to use the 10 Gbps SPF+ port on my router, else I will still be bottlenecked by the 1Gbps port. I purchased an SPF + transceiver (2 different ones) that both say they are compatible with my Nighthawk/Netgear. When I try to connect this together, I keep getting an error indicating that I cannot get connected to my ISP aka Cox. Put the cable back into the 1Gbps port on the Nighthawk and all is well.  So I have a few hypothesis:Arris S33 will not work with an SPF+ transceiver Cox will not work with an SPF+ transceiver Both transceivers are defective though I do get clear link light activity from both the Arris and the Nighthawk using the

S33 v2The modem has been activated and is connected.However, I am unable to login using the default user and password.What is my next step?

I am wondering if it does support the eero 6+ mesh wifi set because I have not been able to find any answers online.

Logging into 192.168.100.1 does not give me an option to configure the DNS.

My Xfinity plan allows up to 100 Mbps upload. I can only achieve 23Mbps. Xfinity says nothing is wrong on their end. I told them my upload signal level is 43dBmV and that falls too low. I have asked them to increase, but I get a run around. They want me to lease one if their modem. I am not doing it. Is there a special number at Xfinity one can call to speak to people who understand me?

How do I reset my wifi password ?

I previously posted on here because I had issues with my sbg8300 as I was getting under 1% packet loss and latency issues.  I assumed maybe it was the modem since it has a puma chipset and I read about those having issues with packet processing.  Recently got a S33 and it was working great for 2 weeks, then I noticed 1% packet loss in games again, and I ran some tests and realized it was the exact same issue as before. I went to my modem admin page and checked out the power levels and such and noticed that the Upstream does not fall within the range Arris said is acceptable (45-51 dBmv I believe) (my previous SBG8300 also was not in the range).  This makes me think since I got a new modem, maybe xfinity is not delivering the proper power levels.  I was thinking maybe a reverse attenuator could increase it, but I am not sure if I need it or if this is an issue.  Main question: Does the power level falling a few dBmv below the acceptable range cause high l

S33 dropping connection, very hot.  I have had it hooked up for 4 days and I get a dropped connection and buffering all the time. I went from 40mbps DSL to 300mbps cable and I feel like I had better internet with the DSL. Modem is running around 160 degrees internally, consistent logs show sync failure SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[removed personal information];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 31/12/1969 17:00:16 3 CMSTATUS:US_Diplexer_Mode_Change:Init, 5-42MHz. 31/12/1969 17:01:44 3 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=[removed personal information];CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 31/12/1969 17:00:16 3 CMSTATUS:US_Diplexer_Mode_Chang

Just set up everything.  I have the s33 and max AX6600. How do I secure my network with name and password? Also, I have 2 routers. One is connected to the modem with ether cable. The second one is just plugged in upstairs.  Is the second one even connected or do I need that connected to an ether cable? How does the second one actually connect? 

My Xfinity Internet speed has upload speed of 200 Mbps, but I can get only 40Mbps. Their technician came and found his test tool could get 235 Mbps. He thinks something wrong with my S33 modem.Can the S33’s firmware be updated? If yes, how do I do that? Thanks. David

As shown in an earlier post, when using Chrome, the Event Log is unavailable. A mod had posted that using a different browser or Incognito mode might help, and that indicated that Arris was aware of the problem. The mod asked for feedback, but the post was closed to comments.Kind of difficult to give feedback if you shut off commenting, isn’t it?I was using Chrome to access, got the same results as the original poster. I switched to MS Edge, and after okaying, gained access, and noted that the Event Log indeed was visible in Edge.The Event Log had been accessible recently, so this problem has only began lately. It would be appropriate for Arris to formally acknowledge it, and take steps to rectify it. Not, ignore it.It is tiresome to, again and again, take “work-arounds” for devices and products sold for hundreds of dollars. Do better.

I just switched to this new Arris Modem and can’t get my Samsung TV to be recognized For Internet access. It’s connected to the network, but not the Internet.

I messaged Xfinity and I get the same issue.. nothing's wrong with Internet.. ok then why am I getting only 400mbps.. I pay for 1.2 and I'm not even getting 500.. for all that I should just pay for what I am getting.. anyone no how to help me fix my problem 

Sequence Diagram of my network: ISP → S33 (previously SBG6580) → Google Nest Wifi → wlan local network                                                                                |→ eth0 Raspberry Pi w/ PiHole + PiVPN (port 51820)Background:I currently run a Raspberry Pi with PiVPN on my Spectrum internet. As of last week I purchased a new Surfboard S33 modem and it seemed to have blocked port 51820 OR has done something to conflict with the port management settings I’ve made within my Google Nest Wifi (Connected through 2.5 Gbs port). I’m aware that modems do not have firewalls and the router is what provides this but the only constant for my port being closed has been this modem / the re-activation of my modem with Spectrum. I’ve even reached out 2-3 times to ask if they had anything in place that would block the port when it was re-activated.

Why is there no phone number to call????

I just got it today. Talked to rcn registered the Mac it's still just blinking green 

Hi, we just got the Modem S33 with Mesh. We did a walkthrough with Xfinity to activate our Modem. They stated on their end that, it is showing we have service. We have a solid blue light, but when try to connect our devices it say connected but with no Internet. Please Help!!