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T25

Xfinity Voice and DOCSIS® 3.1 Gigabit Cable Modem

  • 72 Topics
  • 158 Replies
72 Topics
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The Many
gleapmanThe Many
asked in T25
T25 Modem self-reboots every 48 hours

I have a 2-year-old Arris T25 modem.  Every two days between 9:30 am and 10:45 am, it reboots without any action by me. It’s been happening for weeks, and always two days between reboots, no more, no less. Is it the modem, or Xfinity?The event log always reads the same:PacketCable EventsMTA TFTP: SuccessfulProvisioning CompleteMTA PROV: Successful!Voice Line State Change, Line Number = 1, Prev State = OOS, New State ISVoice Line State Change, Line Number = 2, Prev State = OOS, New State = IS DOCSIS EventsFour minutes before the rebootLost MDD Timeout;CM-MAC=c0:94:35:XX:XX:XX;CMTS-MAC=**.**.**.**.**.**. *;CM-QOS=1.1;CM-VER=3.1;No Ranging Response received - T3 time-out;CM- MAC=c0:94:35:XX:XX:XX;CMTS-MAC-**.**.**.**.**.**;QOS=1.1;CM-VER=3.1;Lost MDD Timeout; CM-MAC=c0:94:35:XX:XX:XX;CMTS- MAC **.**. **.**.**. **;CM-QOS=1.1;CM-VER=3.1; Just before the rebootMIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM- MAC=c0:94:XX:XX:XX;CMTS-MAC=**.**. **.**.**.**;CM-QOS=1.1;CM-VER=3.1; When

111
plemans
Juggernaut
B
The Many
BellyBildonThe Many
asked in T25
What wired router has the best compatibility to the T25?

I’m using EERO mesh wifi which works GREAT. We have Comcast/Xfinity for internet and voice. We want a router to tie into the T25 for our devices.

143
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Wi-Fi Warriors
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The Many
sjgalloThe Many
asked in T25
T25 constantly drops internet connection

Downstream power and snr look good but upstream is bad: I used to get all 5 upstream channels but about a month ago this is when I started having drops:Power is below spec.Is this a cable company issue or is the unit failing to output enough signal for the upstream?

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Wi-Fi Warriors
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Jlouis32The Many
asked in T25
SVG2482ac as wireless router to connect with T25

Can the svg2482ac be used as a wireless router with a t25 modem?

132
plemans
Juggernaut
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The Many
emsodoThe Many
asked in T25
T25 can't check or update firmware

I have a T25 modem and XFinity as my cable provider. Apparently I am not getting the internet speeds available because the firmware on my modem is not up to date. There is no information about the firmware version on the surfboard app that is connected to the device, and I'm also not able to log into the modem settings using the IP address and any browser. I just get an error message saying that that IP address cannot be accessed. Of course my warranty on the modem just ran out last month, and I do not want to pay $40 to access the surfboard customer service. Has anyone had this issue where they cannot locate the firmware version let alone log in to their account to update it?I am aware of the disputes between weather it is Xfinity or Arris that has the capacity to update the firmware. I was just on a very long phone call with Xfinity and they are insisting that it is nothing on their end to update the firmware. I have unplugged the modem several times to force a reset, but without bei

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A
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AzwaynickThe Many
asked in T25
How to remove a refurbished modem from the original account on T25

I bought a refurbished T25 but I can't add it to my ISP because it is still registered on someone else's account. Any ideas?

925
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Rockstar!
L
The Many
LimbmydogThe Many
asked in T25
wifi not working

I just bought a new router Wi-Fi combo and it’s not working. I don’t see any green lights like it says

192
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Wi-Fi Warriors
A
The Many
AsjrizThe Many
asked in T25
Activate T25 without the label and with Xfinity blocking logon until I provide the MAC number

I recently purchased a used Arris T25, I later learned that there is no label, I know I can get the device information like serial number and Mac number if I can log onto the device, it appears to be connecting fine when I attach it to Xfinity coaxial cable, but Xfinity blocks use of the device until activation which requires Mac number.Is there any other way to get the information on this device?

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The Many
D
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DivasdenThe Many
asked in T25
no service

T25 will not show up so I have no service. Xfinity says it's working but I can't find it to connect anything to it

331
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Wi-Fi Warriors
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The Many
tuemseThe Many
asked in T25
T25 phone connection is not working

I connected my T25 to Comcast finally and it’s working very well except that I do not have phone service yet. Do I need a separate connection with Comcast or how do I get the phone to work? 

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eyez4yu2The Many
asked in T25
Slow speed internet connection on T25

My T25 is supposed to accommodate up to 800 MBPS. Xfinity assures that they’re providing 1000 MBPS, but I get  only 400 MBPS. Please advise.

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Wi-Fi Warriors
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The Many
sub720The Many
asked in T25
t25 cable modem power supply plug does not fit

i recent bought a Arris T25 cable modem pn 613587-003-00. The included power supply Ktec Ks051867 plug does not fit into the cable modem power input. I tried looking on the Arris support website for the model number of the ac adapter but could not find it. The ac adapter is 12V 2.5a so should work. Any help would be much appreciated.

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Wi-Fi Warriors
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issaquahThe Many
asked in T25
Two phone number on one port - T25

Comcast provided me with two phone numbers. On my previous Arris modem they could configure the modem so both phone numbers were accessed thru one jack on the modem. Comcast claims this is not true on the T25. Must I use both jacks on the modem in order to have both phone numbers?

261
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Wi-Fi Warriors
S
The Many
stchurch61The Many
asked in T25
Dead T-25

I purchased a T-25 at Best Buy on June 5, 2024 and successfully activated for Internet and phone service with my provider. Today I returned home and all of the lights were off on the modem and I didn't have Internet or phone service. I tried resetting use the button on back but nothing. Can you provide any other troubleshooting advice or instructions for repair/replace? Thanks

413
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Wi-Fi Warriors
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GamedoreThe Many
asked in T25
Password reset on T25

I received a used t25 modem from a realtor friend of mine. I do not have have access to the password, and I don't see it anywhere on the modem. Is there a way to reset it without having the old password? Thanks. 

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Wi-Fi Warriors
J
The Many
JohnnyuThe Many
asked in T25
what router to purchase that is compatible with the T25 modem

what router to purchase that is compatible with the T25 modem

371
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Wi-Fi Warriors
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ttripoltThe Many
asked in T25
Unable to Login GUI portal on T25 problem

I am unable lo log into the T25 Surfboard modem with 192.168.0.1 What am I missing? Please help!

631
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Wi-Fi Warriors
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The Many
RtarbellThe Many
asked in T25
Issue on Xfinity Stream with T25

I recently purchased and activated a new T25 modem with voice. Having a problem with the Xfinity Stream service. Xfinity stream works fine for a few days before becoming non-functioning on all devices. After many failed attempts to restore stream service, I've found that going through the modem activation prosess restores Xfinity Stream. Any suggestions on what to do to avoid repeating the activation procedure? Modem works fine otherwise.

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Wi-Fi Warriors
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The Many
seattlerustThe Many
asked in T25
Connecting Voice Modem to other phones - T25

I recently moved from my long time home to an apartment. I was receiving xfinity phone service through a voice modem and had numerous phone jacks in the house, all of which worked through the single modem’s connection. In my new apartment, I have a number of phone jacks but can’t find a way to make them work with my new Arris T25 Modem. Only the phone attached to either of the two outlets on the modem will be connected. I tried connecting the modem to one of the jacks, then nothing worked. Any thoughts?Thanks,SR

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Wi-Fi Warriors
D
The Many
Dtaz71The Many
asked in T25
Unable to register - T25

I tried to register my T25,  was told the serial # doesn't match model. Never had this happen before. Any help appreciated. 

311
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Wi-Fi Warriors
S
The Many
sullivanmmsmThe Many
asked in T25
Wi-Fi name and password setup of T25

I am unable to see my newly setup T25 modem to change the network name and password on the xfinity app

1721
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Wi-Fi Warriors
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The Many
StatmanThe Many
asked in T25
SSID for 2.4 GHz for T25

I know I am supposed to find the SSID and WiFi Key on the white label on the bottom of the Arris Model T25, but it is not there. Now what? 

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Wi-Fi Warriors
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The Many
taylac5The Many
asked in T25
Router Name and Password for T25

My Arris T25 is activated and is connected to the wifi but I do not know the network name or password. Please help

1971
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Wi-Fi Warriors
D
The Many
dgf333The Many
asked in T25
T25 A/C adapter

Will the SB8200 AC adapter work with the T25 modem?

384
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Wi-Fi Warriors
A
The Many
agtpack12The Many
asked in T25
can’t connect to T25

I connected my new modem, cable is working but I can’t connect the internet and phone 

2353
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Wi-Fi Warriors
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