SB8200

I’ve had an Ooma Telo VOIP router for making phone calls for over a decade.  Recently my Ooma Telo started acting up, requiring frequent reboots to get my phone system to work. In response I ordered a new Ooma Telo but was unable to get it to work with my Arris 8200. After three hours of phone calls to the technical support folks at Ooma, I was sent the following instructions:“Please also check and make sure that the firewall on your modem and/or router have been disabled. Ooma uses the following application ports for outbound data and voice traffic:UDP and TCP So you need to make sure those service ports are open on your internet connection”Has anyone else encountered this difficulty? My first thought was that the new Ooma Telo might be defective.

I have an SB8200 used to Link to COX.The modem keeps dropping out and has to reconnect.  Called Cox, they think the modem is bad (the associate didn’t seem to have a full handle on the situation).  Question is the Event logs show the following when it drops out:Do these events indicate a problem with COX or the Modem?Thanks,  15/11/2024 10:33:11 3 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC={edit:personal information};CMTS-MAC={edit:personal information};CM-QOS=1.1;CM-VER=3.1;

After moving to a new location (moved to an older house as opposed to being in an apartment), SB8200 can’t establish a downstream connection. Getting errors very similar (almost exact same status message) to the ones in the following post:I also am getting multiple instances of “UCD invalid or channel unusable” and “No ranging response received.” Modem has worked for 2 years and has only started failing after the move. Checked and the warranty has expired in March of this year. Any suggestions on how to fix this issue? Thanks!

Before I go into detail, I want to proactively thank  this community for the help you can provide us.  Thanks!!  Our Wi-Fi account is no longer available on our house system. Our WiFi provider did several tests/checks and said their signal to us was good. They referred us to Arris because we bought an Arris SB8200 modem and router which has worked fine so far. It sounds like we need help setting up a new account through your modem. I have no idea how to do that. 

I have bought a new modem SB8200 and router Tp Link Archer AXE75 for few months.On Saturday October 26, 2024, my wifi stopped connecting to Internet. I followed this site instructions https://www.tp-link.com/us/support/faq/1556/. I removed the power cable and coaxial cable from SB8200 modem, then waited for 1 minutes. I turned on the SB8200 modem and waited to for it to startup. After it booted up, I plugged in the coaxial cable and my wifi stopped giving “connected without internet” and everything was fine. But this happened on Sunday the next day, I redid the steps on I took on Saturday. And today, on Monday, I just unplugged the power cable from SB8200 modem and the wifi started working. I think my router is working fine because I don't have to restart it. But I really don't know which of the two, modem or

My modem is under warranty and is no longer reliable. How do I get a replacement? Patricia N 

Just want to confirm if the unit I got has busted ethernet ports. The front indicator lights on my modem and my ISP show connection is fine. However the lights by the ethernet ports don't seem to go on except when the device is first turning on. My router is showing no connection to the modem and tried the same with laptop with different cables and got the same thing. I assume the lights on the back by the ports should go on if the ethernet port(s) are working. Is that correct? Also I'm only using one port at a time.

Hi,I am having an issue with the modem where all lights are solid blue but the modem is not working.There is obviously no internet. However, even when I plug in ethernet to my computer, it does not even get detected as connected. I know its not the ethernet cable or computer because I plugged the same computer with the same cable into another modem and it detected it fine.  I tried restarted it (plugging it out, leaving it 10 mins and replugging it) and it immediately goes to the solid lights, no blinks or anything else. I tried pressing in the reset button for 4-5 seconds, nothing. Then again I restarted and I tried holding reset button for 10 seconds, nothing. Then I  again restarted and tried holding reset button for 30 seconds nothing. It’s as if its stuck. Like I said it doesn’t even get detected as plugged in into my computer so I cannot even use command prompt to diagnose it. The issue seems similar to 

Upgraded SB6190 to SB8200v3 at professional office. Office has static IP from Optimum. 8200 is registered with Optimum. 8200 will not connect. Keeps going thru the boot process. Put the 6190 back in service, which is not registered at this point, and it connected within 2 minutes. Recently did same upgrade at my residence, 6190 to 8200v2. Called Optimum, registered the 8200v2 and online within a few minutes. 

Purchased a new modem and mesh router today but can’t log in to the sb8200 to get the settings.  Continually get a time out error.  Internet is working fine when connected to ethernet

Cox has a limited list of certified cable modems available to purchase. They recommend an SB8200, although in the feature list, it states that digital voice is not supported.I have a grand stream IP PBX system and wanted to see if this system will actually work with the 8200.Do I simply setup my internal router connected to the 8200 and setup a NAT from my fixed public IP address to the IP PBX system through my router? Or does this configuration not work with the 8200?Still trying to decide whether to purchase the 8200 for my configuration. Thanks

Hello. I ended up replacing my apparently defective, several years old, SB8200 modem with a new SB8200. I have Xfinity cable internet and am paying for 500 Mbps speed. The past few weeks my speed had dropped to around 40 Mbps or dropped off completely. An Xfinity technician came out and checked my outside cable and measured the signal coming into the. It measured at around 1,700 Mbps and only about 40 Mbps coming out of the old SB8200. While the old SB8200 was working, the download light was always blue, indicating that it was operating in DOCSIS 3.1 mode. I have installed the new SB8200 and am measuring download speeds of around 550 Mbps. However, the download light on the modem is staying green, indicating DOCSIS 3.0 mode. Is there something wrong with the new modem that is keeping it in DOCSIS 3.0 mode? Or did Xfinity set up the connection incorrectly with the new SB8200?Thanks for any feedback.

I bought the arris sb8200 a while ago, is a docsis 3.1, I also had been using astound internet “previous called RCN” for a while, I really need the 800mbps but my download speed won’t pass the 340 on wifi and 380 wired, my tplink router also can reach the 1gb and I am using the 5ghz channel, Astound support told me that they are not able to trobleshout the modem because is not one of the modem. I reset, hard reset etc and nothing , I am not sure if there is a firmware update and how to do it. Thanks again

Hello - I have an SB8200 running on Cox. We keep getting booted from the internet for short periods of time (10-30 seconds) at random times of the day. Cox has tested everything on their end and says there is no issue they can see. This is a privately owned modem, so they are unwilling to troubleshoot any further.  I pulled the SNR data and have attached the Downstream Bonded and Upstream Bonded readouts: The upstream numbers don’t seem to fall in the range specified in the “Cable Signal Levels” document https://arris.my.

SB8200v2 cable connector/nipple is smaller than the old Arris Modem it replaced. therefore, my cable is too large and will not screw on the new 8200. is there an adapter for the cable? is this a new standard? do I have a foreign version of the SB8200? please help.

Tried hardwired from modem to laptop/browser Url to 192.168.0.1 but no internet connection 

Can anybody help me out how to update my modem

I have a several years old Surfboard SB8200 modem attached to Xfinity internet cable and using a Netgear Orbi RPR50 mesh network. All has been working fine during this time with download speeds of around 550 Mbps. Just recently (past 2 weeks) the wifi has been stopping completely for several minutes, then will start up again for a few minutes. This cycle has been happening now constantly. A speed test of the Orbi using their phone app is showing about 40 Mbps download speed, when the internet is working. The Orbi is updated to the latest firmware version. Testing of the internet done by Xfiinity’s automated system shows no issues with their signal. An Xfinity technician came out today and ran tests of the cable coming into my house. Speed test shows the cable is sending out about 1700 Mbps download. When the technician unhooked the Orbi and tested the download speed coming out of the SB8200, it showed a download speed of only 70 Mbps. The technician is suggesting that the SB8200 is

Hello all, I bought this modem to replace my ISP’s modem and thought this would be a great upgrade. From the beginning the Modem worked perfectly, it gave me no issues with the initial setup and It would function in the same exact state it had been setup with as. Unfortunately 5 days ago the modem would show all green lights lit up and stay lit but my Wi-Fi would show no internet. Knowing this I used an ethernet cable plugged straight to my pc in order to circumvent the possibility of my router being the problem. The problem still persisted.The past few days the only way I have been able to connect to the internet was by resetting my modem and router countless times until they would miraculously work. I have contacted my ISP about the issue and have went through two hard resets of the modem in order to try to fix the issue with the help of the ISP to set the correct signal strength. In fact I have went through every possible discussion on this forum to find a solution to my p

I just connected my modem, activated with spectrum and have full connection to internet on my desktop that is connected via Ethernet. My google WiFi is not getting internet connection and neither is my apple tv ( connected via ethernet). is there a setting for the modem to give internet connection to devices? 

I recently purchased a SB8200 from Target.  I’m unable to log into the web UI at 192.168.100.1.  I initially signed in and set a password, but then couldn’t sign in after setting the password.  I’ve tried resetting to factory defaults, but still can’t sign in. (It says incorrect password.)  I called support and they said the unit is out of warranty, that I’d have to pay $40 for support.  They advised that I email my receipt to support, which I did weeks ago with no response.  Any recommendations on how to resolve these two issues? I’m assuming I’ll be told to factory reset which I’ve tried multiple times, but still can’t sign in using the default: admin/password

Need to change it 3.0 to 3.1 

I have a version 1 sb8200 and I just bought a v3 to see if potentially my 4 to 5 year old modem was starting to fail. When hooking up the new modem it never got any downstream signal or showed more than 1 down or upstream channel at a time in the access page.The isp (optimum) had said they had everything provisioned on their end for the new modem, but it seemingly would never act like it was getting signal to pass internet through. I should mention, when plugging the v1 modem back in it instantly had internet again without it being re-provisioned. I’m wondering if there’s some way to tell that the modem is faulty before returning it if it so happens that my old modem isn’t failing.

need help to set it up

I have a new Invizbox VPN router that I have connected to my Arris  SB8200 modem, and I cannot get an internet connection.  I have a Nest router also connected to the modem via the second port , and it has a strong internet connection.  Is the Arris SB8200 incompatible with the Invizbox vpn router? Or is it possible for the Nest router to block the vpn router in some way?  The two routers are not in line with each other, and I would eventually like to have the Nest router run through the Invizbox router, but for now all I am trying to do is get a simple internet connection on the Invizbox router straight from the modem. Any thoughts?