Skip to main content

Modems

DOCSIS 3.0 and 3.1 cable modems

1503 Topics
J
The Many
jmcrottyThe Many
asked in SB8200
Still Cannot Login to SB-8200 Modem...

This modem has been working well for me.  I want to login to the modem AND I CANNOT ACCOMPLISH THIS.  My tech skill level is high.  I have spent hours doing Google searches on how to do the login, including using different combinations for usernames and passwords, including using the last 8 digits of the serial number for the password, and attaching my laptop directly to the modem, AND NOTHING HAS WORKED.  Arris needs to address this issue, as I found many frustrated people posting online about having the same problem with this modem.  Thanks.

3453
N
Rockstar!
B
The Many
BobhThe Many
asked in S33 | S34
Can't access 192.168.100.1 S33

Got Xfinity to activate and working but can’t log in to admin portal

8581
N
Rockstar!
B
The Many
BertoThe Many
asked in S33 | S34
S33

Just hooked up my S33 and had it activated through Xfinity. I connect to my WiFi router and works great. However,  when I unplug from router and hook my modem directly to my laptop, it says unidentified network and it will not connect to the internet. Any suggestions?

2031
N
Rockstar!
J
The Many
jsmoradaThe Many
asked in SB8200
New SB8200 and Xfinity

I just bought a new SB8200 to replace my DOCSIS 3.0 Modem and I don’t think what the status window is showing me is what I should be seeing. The downstream bonded channels are all QAM256, while the upstream channels are SC-QAM. On the front of the modem, the second light from the top is blue and the third is green.I was on the phone with Xfinity for almost an hour since they had trouble connecting to and they were finally able to provision it. When I asked them about what I was seeing on the status screen they told me it’s that way since it’s a customer-supplied modem, I don’t buy that answer.Channel ID Lock Status Modulation Frequency Power SNR/MER Corrected Uncorrectables 29 Locked QAM256 579000000 Hz -4.6 dBmV 40.6 dB 0 0 13 Locked QAM256 477000000 Hz -5.4 dBmV 39.8 dB 0 0 14 Locked QAM256 483000000 Hz -5.1 dBmV 40.0 dB 0 0 15 Locked QAM256 489000000 Hz -4.9 dBmV 40.1 dB 0 0 16 Locked QAM256 495000000 H

6515
M
The Many
F
The Many
FourthwindThe Many
asked in S33 | S34
S33 slow speeds with xfinity.

Both Arris and Xfinity pointing fingers at each other.  Paying for 1.2 gig and getting between 200 and 400 on ethernet.  Was getting 900plus on xfinity modem.  Attached are logs if someone can help me.(edit: CM-MAC information removed)31/12/1969 17:02:19 3 SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1; 31/12/1969 17:02:22 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=***.***.***.***;CM-QOS=1.1;CM-VER=3.1; 18/3/2023 07:09:40 3 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=***.***.***.***;CM-QOS=1.1;CM-VER=3.1; 18/3/2023 07:09:49 3 No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=***.***.***.***;CM-QOS=1.1;CM-VER=3.1; 31/12/1969 17:00:15 3 CMSTATUS:US_Diplexer_Mode_Change:Init, 5-42MHz. 31/12/1969 17:00:20 3 SYNC Timing Synchronization failure

6841
S
Wi-Fi Warriors
D
The Many
DaniGThe Many
asked in S33 | S34
How to open ports so T-Mobile Cell Spot can communicate

My T-Mobile Cell Spot (a mini home tower so I get strong signal throughout my home) worked for 2 years without problems. We had to change the primary person name on account and they made us return cell spot and get a new one because according to the FTC it has to be registered in that exact person’s name. Waited to install new cell spot until Arris S33 and EERO mesh pro were installed so it was all new. Everything was working for 7 days and then cell spot went out. Made several attempt to reboot and talk to T-mobile tier 2 tech support. They say that I need to open the following 3 ports so T-mobile cell spot can connect to the internet:UDP 500UDP 4500UDP 123Everything else works great but my cell spot and I fluctuate from 1-2 signal bars. I need it to be back at full 4 throughout my home. It isn’t spectrum nor EERO and T-mobile is saying it is the modem. Unfortunately, I can’t find anywhere that has the ability to change any port settings 

4322
D
The Many
E
The Many
emiwavThe Many
asked in SB6183 | SB6190
sb6183 not working

i’ve been trying to set up my modem to no avail  i had this modem and a tplink router set up at my previous address, using xfinity i’m trying to install it now, but the globe button won’t turn on and connect to the internet. i called xfinity and they said it all looks good on their end. i’ve unplugged and reset a few times, but still nothing. 

2272
E
The Many
J
The Many
Jgcekc7355The Many
asked in SB6183 | SB6190
Arris sb6183 need primary DNS

How do I find the Primary DNS

721
plemans
Juggernaut
pspiersy
The Many
pspiersyThe Many
asked in Modem - General
Which password?

When the tech helped me set up my Arris 824A modem and WiFi yesterday, we changed the default, preshared Key (password).I am positive it was changed. I wrote it down. I tried to log in today because the network and guest network appeared in my network list but, the latter, will not connect. Neither the preshared default , nor me new password will work. Suggestions?

421
pspiersy
The Many
C
The Many
CasaverdeThe Many
asked in Modem - General
how yo vhange name and password on modem to something easier

Does anyone know how to change the modem network name  name and pass word for my air b and b so guest can recognize the name when they connect to Wi-Fi. changjng admin name only seems to change it for log ins to my account any help would be appreciated 

1481
plemans
Juggernaut
R
The Many
Rh37The Many
asked in SB6183 | SB6190
sb6183 not connecting properly

The internet thru my sb6183 would not come back on after being knocked out by a snowstorm. I’m trying to trouble shoot. After a factory start the status for upstream power is below spec. 35.7 dBmV-39.7 dBmV versus the +51 dBmV to 45 dBmV that it’s supposed to be. Is that enough to make it not function?

2442
R
The Many
S
The Many
scottma61The Many
asked in S33 | S34
S33 IPv4?

Please forgive my ignorance of networking for this question.  I plan to connect the S33 to my EdgeRouter-4 and will use Xfinity as the ISP.  When I first attempted this (which I am certain I did not do correctly), the modem had an IPv6 address assigned to it.  My EdgeRouter-4 is currently setup to only work with IPv4.  If I activate the modem (correctly, this time) is it capable of receiving an IPv4 address from Xfinity, or do I need to adjust something in my router setup to accommodate an IPv6 address from Xfinity? Thanks.

951
S
The Many
N
The Many
nettefendThe Many
asked in Modem - General
connecting to PS5

When trying to connect PS5 to surfboard wifi, it says connection too weak .  Modem is one room away. Help.

881
plemans
Juggernaut
R
The Many
RobertaThe Many
posted in Modem - General
Beware of Emails from Comcast

I recently received an e-mail from Comcast telling me that my Arris modem was no longer compatible with their speed increase (?), and that I needed to upgrade. I bought my modem directly from Arris. I was about to shop for another modem through Comcast (that they conveniently provided a link for), when I noticed that the modem that Comcast claimed I had was different from the one I actually have. I called Comcast and they finally admitted that they sent me the wrong info. They concluded by saying my modem was “somehow still compatible” I called Arris to verify and they gave me the correct info.If anyone who has Comcast gets this e-mail, make sure they are referring to your modem, and check with Arris directly before buying another modem!

481
plemans
Juggernaut
B
The Many
bdrownThe Many
asked in SB8200
Hardwire Mac to Modem

Currently connected via wireless to Arris Surfboard SB8200. I want to connect directly to modem via network cable but when I do that I get the message: Status-Connected; Ethernet has a self assigned IP address and will not be able to connect to the internet. Is there a setting I can change in the Modem to allow connectivity ?

1403
plemans
Juggernaut
mdcleary76
The Certified
mdcleary76The Certified
asked in SB8200
Slow download speed with Aris Surfboard SB8200 & TP-Link Deco X55

A little background first - my COX account is for 500 Mbps, and with theGateway speed tests on the COX website were somewhat greater than 500 Mbps.  However, we experienced daily issues with the WiFi, having to reboot theGateway at least once almost every day.  Our laptops and other deviceswould lose connection fairly frequently.So, I recently replaced my COX Panoramic Gateway with an Arris SB8200cable modem connecting to a TP-Link Deco X55 (AX3000) mesh system (3 nodes).  The setup was easy and our devices don't seem to have any issues connecting.However, download speed tests are now showing 80 Mbps (upload ~10 Mbps).  A wired test with my laptop connected directly to a Deco node showed onlya slightly higher download speed of 85 Mbps.According to COX my modem was provisioned properly and it all looks good on their end.So I sent a detailed report to TP-Link support, including allinformation they requested (various speed tests, network topology, firmware version, etc.).  They responded

4311
S
Wi-Fi Warriors
G
The Many
GunnerThe Many
asked in S33 | S34
S33 login issue

I have the S33 and Archer Gx90 router, when I type the default IP. 192.168.100.1.  It times out so I cannot log into the modem to check status... If I unhook the router its works fine..... I just dont want the annoying process.    Thanks

11302
G
The Many
L
The Many
LV Jody
asked in SB8200
SB8200 Ethernet 2 Activation with separate ISP

Just installed SB8200 and activated port 1 through Cox.  Setup was smooth.  I also have Verizon Home 5G (Cox is unreliable) running with no conflict.  I know how to set pass thru for the 5G modem but need to know how to add the IP address to port 2 on the cable modem.  Cox refused to help.

892
plemans
Juggernaut
M
The Many
Moe071The Many
asked in S33 | S34
S33v2

I purchased the S33, how can I tell if it's the v2 model?

2842
M
The Many
R
The Many
rhythmslamThe Many
asked in SB8200
is there a Sb8200 firmware update for Cox internet

I am currently getting several dropouts the past few days. I contacted Cox customer service and they stated that Arris has a firmware update for the Sb8200. I went to the site and found nothing. Can anyone please help me with this. Thanks in advanceMax

40711
S
Wi-Fi Warriors
B
The Many
bainrbThe Many
asked in SB8200
ARRIS Surfboard SB8200 with Mikrotik router

My ISP is Comcast/xfinity. I am using ARRIS Surfboard SB8200 DOCSIS 3.1  bridge mode. I have a  MikroTik RB2011UiAS-RM Routerboard Rackmount 5xLAN 5xGbit LAN 1xSFP connected to ARRIS Surfboard SB8200 DOCSIS 3.1.  Here is my issue the ARRIS Surfboard SB8200 is a Gig-e port. The RB2011UiAS will not connect to RB2011UiAS as a 1 Gig port. if I hard set the RB2011UiAS to 100 meg both units will connect, but dhcp will not work or pass traffic. Any suggestions.  

1721
plemans
Juggernaut
R
The Many
robtoddThe Many
asked in SB8200
Google WIFI with SB8200

I cannot seem to get Google WIFI setup with the Arris SB8200

7911
plemans
Juggernaut
C
The Many
ChicagoDaveThe Many
asked in SB8200
Is it correct that Mediacom is responsible for firmware updates to my SB8200 ?

Looks like the firmware on my SB8200 was malfunctioning (long story, but trust me on this). Mediacom tech support told me to request Arris to update my firmware.According to what I’ve read in this Community, it seems like Mediacom should push any/all firmware updates to my SB8200.Related info: hardware reset in my SB8200 cleared up my issues.  So the firmware probably was trashed.Going forward, I would appreciate some informed input from y’all before I start getting after Mediacom.Thank you, Dave

4302
plemans
Juggernaut
D
The Many
dscThe Many
asked in SB8200
SB8200 my connection is dropping intermittently over past 3 days

Rebooted laptop, modem, and router -- drops still happening and garbling webex audio.Xfinity mobile app is not showing any indication of outages.Fast.com and speedtest.net always eventually revert to normal speed at round 85 Mbps, but still drops happening.On the SB8200 status screen, comparing expected values onhttps://arris.my.salesforce-sites.com/consumers/articles/General_FAQs/SB8200-Cable-Signal-Levelsto what I see, the one that stands out is upstream bonded channel power is at 37 or 38 for me:whereas the doc says acceptable is 45 - 51. So, what do you think?  Is this a real problem?  could be THE problem?  No idea what this power level was 4 days ago when webex was fine.

5495
plemans
Juggernaut
E
The Many
emccThe Many
asked in Modem - General
Extended Warranty

Hi everyone! I’m considering upgrading my modem/router with an Arris product. I was wondering if it was possible to purchase an extended warranty so I can be covered in case of an issue beyond the first year. If so, how much does it cost?

301
S
Wi-Fi Warriors
Terms & ConditionsCookie settings