Modems

I recently returned my xfinity modem/router and purchased a new one.  My IT Guy at work suggested the upgrade to speed up my service.I have the SB8200 modem and TP-Link - AX1800 WiFi 6 Router.I hooked everything up, but the wifi seems to be slower than before.  I don’t know if something isn’t configured correctly? I’m no expert at all so any help would be appreciated.  Here are the screenshots I thought might help.  [edit: removed image with personal information]

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 just bought this refurbished modem and was not provided the password. There is no password information on the bottom, which is super annoying. I just tried to factory reset and it still didn’t work. I am beyond frustrated and angry that I cannot find a phone number to contact Arris for help after Xfinity couldn’t help anymore. How do I get this damn thing to work?! Please help!!!

Hi,  I just upgraded from an SB6120 to the SB8200. All seems well, except I cannot reach the configuration/status page at 192.168.100.1 (It returns “This site can’t be reached” after a timeout) . I can reach my router at 192.168.1.1 in the new configuration (modems swapped),  and access to 192.168.100.1 worked fine before to the older SB6120 when connecting through my router. But the SB8200 refuses to connect, even when I go the extra mile by directly connecting it to my computer and power-cycle the modem. (Which is obviously a terrible workaround, but I tried it)With direct connection from computer to modem, I can use the internet after I reboot the modem, so the computer and modem are talking. But still I cannot reach 192.168.100.1 to look at the Dashboard/etc in the modem :-( Is there anything that my internet provider might have done during setup to lock me out (I didn’t try it before swapping the modem with the IP). Is that possible?  And why did the old SB6120 co

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

Product description says you can use app. Will the SB8200 work on the arris surfboard manager app?

Where can you find the firmware ? I am at   AB01.01.009.51_080720_183.0A.NSH and I know there has been a newer firmware out there. Can my ISP update the firmware on my owned modem? Can you SSH into it to upload it?

Hello I've checked multiple times with my ISP, Optimum, who have confirmed they are providing between 900-1.3gb down on multiple occasions I connect to an Archer AX21 (DOCSIS 3.1) with a cat5e and it gets 300mb down.Ive tried connecting to the modem (SB8200) with a DIFFERENT cat5e and get 400mb down. I use the first cat5e and still get 400mb down. I'm getting 40-50% of my ISP provided speed through the modem when directly connected . I also ran through support with Archer and they don't have any obvious solutions from their end since all the speed drop occurs before their product

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

I’m trying to set up my surfboard Model: SB8200 and it’s asking for SSID and password provided on device label and I don’t see this info on the label. Please help. I’m getting very frustrated. There was no QR code either. 

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? 

Why isn’t my modem operating in docsis 3.1 mode when my ISP says it’s supposed to be?

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

I went to Xfinity and after a lot of troubleshooting they said that my surfboard docsis 3.0 cable modem (SB6190) came up as flagged for the reason for why my internet was slow and everything was good on their side. What could be happening with the modem? 

I have purchased a brand new SURFBoard SB8200. But lately i have been having several interruptions on my connectivity, where it seems the modem reboots itself. This is causing me a lot of issues I am running my own business, and multiple occasions this reboot, interrupted my zoom session (this is not professionals), it does not reflect well on my Company. Please advise why this is becoming an issue.

My ISP sparklight is unable to push an update to my modem. I am only receiving docsis 3.0 and should be receiving 3.1. I am also unable to use the web interface by typing in 192.168.100.1

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.

Xfinity cannot connect w my surfboard modem. Says it already registered to another customer and I should return it to Arris. Suggestions?

Hi,Purchased this device in March of 2023 and It recently failed.  We unplugged, tried different power strips and outlets, etc etc etc.  Finally our ISP Xfinity came to investigate and confirmed that the device was not functional.  We are looking for a replacement or refund.  Please Help!Thanks so muchHilary

I am using an external Linear power supply for my surfboard, 8200 modem. Is the diameter of the pin in the power inlet 2.1 or 2.5? Thank you

How do I speak with a Arris Surfboard technical person for help

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.

New sb8200  the lower blue light turned green after 3 weeks use.  Provider wifi has a good signal. I checked.   The eero extenders are on as a few devices have signal and are working!  I have unplugged the modem and pushed in the reset button several times to no avail.   Down stairs tv on signal, upstairs tv has signal. What gives? 

Trying to log into an active modem by using the browser.  Used the default password (last 8 s/n) and then it immediately prompts me to change the password; I’m good with that.  But when I enter the new password (example Abc#1234) is continues to prompt me to enter a valid password.  According to the displayed syntax it is correct.  I’ve tried multiple variations and when I leave something out the correct error message displays (such as numeric required, etc.).  I’m stuck in an infinite loop; every time I use a valid password I continue to get the popup “192.168.100.1 says Please enter a valid New Password.”  Modem is running fine so I don’t want to reset the modem.  Any suggestions for a solution?