Modems

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.

Let me start by saying that I have purchased a new SB8200, had a tech replace the coax in the wall and he also provided me with a new cable. My modem signal levels, and I forget the exact values he specifically mentioned, are in the dead center of the allowed ranges. “Perfect” is how he described them (for what that's worth) because they could fluctuate and still be within the desired range.I did not have any issues with packet loss until I purchased 3.1 modems. I also own a g36 and experience the same phenomenon of 1-4% packet loss out at rather constant rate. I do not game with a router and I unplugged directly into the modem itself. I have tried different ethernet cords. I have also used the hidden troubleshoot menu on my series x and completely factory reset it… twice.I recently read a thread that someone else with a 3.1 modem was experiencing packet loss out as well. My very loose “theory" is that AQM, active Queue Management, is dropping packets in order to ensur

Hello,  I work from home using ethernet directly into the modem (hard wired) and have been having several intermittent connectivity issues.  System stall, and the modem losses internet connection.My work tech support says it's my provider. My internet provider says it's my modem.  What is the life of a modem? I think mine is about 4 years old.   And, what are the signs /symptoms that indicate my modem is going bad? 

Hi, I have bought my modem since August 2023 as a replacement to the modem provided by my ISP. SB8200 never managed to work, and it show the following symptoms : 1. The green light of downstream keep flashing green 2. Startup ProcedureAcquire Downstream Channel : 0 Hz : In ProgressConnectivity State : In Progress : Not SynchronizedBoot State : In Progress : UnknownConfiguration File : In Progress        Security : Failed : BPI+DOCSIS Network Access Enabled : Denied 3. Downstream Bonded ChannelsChannel ID : 0Lock Status : Not LockedModulation : OtherFrequency : 0 HzPower : if the cable is disconnected, it's around -51.6d BmV. When it's connected, the value changed randomly, have values around 0 and sometimes become even positive.SNR/MER : 0.0 dBCorrected : 0Uncorrectables : 0 4. Event logAll the time i have this error"SYNC Timing Syn

Only green power light. Factory reset does nothing. No flashing lights. No reboot. Nothing. Plugged in for several minutes. New modem. Lights were working. Did a factory reset. Now nothing but "I'm plugged in".

My internet is not working. Xfinity tried to help reboot but not successful. They said the problem may be the modem and I need to contact them but there is no phone number anywhere?? 

I have talked to Cox Tech support twice, they did everything on their end to setup the SB8200.They sent rests to the modem 5 separate times and I unplugged it everytime, the modem does not respond. All the lights go green and only one eventually turns solid blue….absolutley nothing else happens after at least 1.5 hourse on the phone with Cox Tech support.I need this unit replaced.

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

We as a company have been using the CM820B Cable modem. (240 volt internal PSU)We now want to purchase 100 * CM3200B Devices. 12 volt  external PSU.Cannot find specs for the DC power connector.We need  a “Brick” type PSU 12 volt @ 2 Amp - 2.1 * 5. 5 mm connector does not fit (5.5 to big)Measured supplied PSU  connector @ 1.1 * 5.1mm.Anyone know a “brick” PSU that will work or can confirm the actual size of the connector on the CM3200B 

How to change the Management IP.  192.168.100.1 conflicts with the network subnet.

Cannot access modem with the password I created 

I’ve followed the instructions to factory reset the modem several times but the event log doesn’t clear. Is there anything I can do?

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

Can’t connect xBox

I cant find a clear answer on versions for SB8200.  Other questions have been asked but no clear answer.  Need v3 as preferred for Spectrum.  And am I correct that there is no way to contact Arris support unless you pay for the support tier?  Thanks !

Only green power light. Factory reset does nothing. No flashing lights. No reboot. Nothing. Plugged in for several minutes. New modem. Lights were working. Did a factory reset. Now nothing but "I'm plugged in".

I have Xfinity and my normal speeds are about 700mb.  However, every few days my speed slows down to 3mb and I have to boot the SB8200 to get the speeds back up.  All front lights always stay green even if there is a provider issue.???  Today no internet with all lights green, reboot the Aris and internet is back.???

Does Arris have a phone number to contact their support?

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!! 

I’m not able to connect my new SB8200 to my laptop to activate it. The top light is green, the 2nd one is blue and the other 2 stay green (it should be white - blue - blue -white). I’ve restarted it multiple times and also used the reset button but nothing changes. I can reconnect my old SB6190 using the exact same connections and it works fine. Any suggestions?

I just purchased the Arris Surfboard SB8200 modem.  Comcast has already registered and configured on their end.  I have two ports on the modem, I have one port direct connected to my wife’s work computer that has an IP address.  The other port is to my router for WiFi which is not getting an IP address for it.  I was informed to call ARRIS to configure the new modem. I’m waiting on hold for a support rep now.  Figure I can get some answers/help from the community.

Hi, I’m having trouble connecting a Simplisafe base station to my Wi-Fi and they said it might be due to being on the wrong bandwidth. I checked with Xfinity and they couldn’t help me since it’s not their equipment. The other things SS said was that their equipment wouldn’t work if we are using VPN. I explained to them that I have several devices from different manufacturers all connected to the Internet...no problem.Would bandwidth and VPN be a problem?

My SB8200 does get Internet and is working but my Google nest router doesn't seem to get anything from it so I can't learn in my nest router 

If I install new sb8200 cable modem, who changes the login password to modem when done?does the cable company do that or do i changed it from default?